./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.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_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/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_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/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_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/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 c8425a5d05ac446a6871721d80167c62d0d4f36c759d59becfd4b9bf0feba487 ............................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/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_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/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 c8425a5d05ac446a6871721d80167c62d0d4f36c759d59becfd4b9bf0feba487 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:33:16,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:33:16,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:33:16,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:33:16,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:33:16,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:33:16,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:33:16,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:33:16,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:33:16,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:33:16,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:33:16,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:33:16,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:33:16,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:33:16,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:33:16,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:33:16,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:33:16,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:33:16,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:33:16,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:33:16,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:33:16,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:33:16,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:33:16,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:33:16,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:33:16,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:33:16,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:33:16,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:33:16,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:33:16,568 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:33:16,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:33:16,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:33:16,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:33:16,574 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:33:16,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:33:16,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:33:16,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:33:16,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:33:16,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:33:16,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:33:16,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:33:16,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:33:16,634 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:33:16,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:33:16,636 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:33:16,636 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:33:16,636 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:33:16,637 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:33:16,637 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:33:16,637 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:33:16,637 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:33:16,637 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:33:16,639 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:33:16,639 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:33:16,639 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:33:16,640 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:33:16,640 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:33:16,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:33:16,641 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:33:16,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:33:16,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:33:16,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:33:16,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:33:16,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:33:16,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:33:16,643 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:33:16,643 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:33:16,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:33:16,644 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:33:16,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:33:16,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:33:16,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:33:16,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:33:16,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:33:16,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:33:16,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:33:16,648 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:33:16,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:33:16,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:33:16,649 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:33:16,649 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:33:16,649 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_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8425a5d05ac446a6871721d80167c62d0d4f36c759d59becfd4b9bf0feba487 [2021-10-29 05:33:16,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:33:17,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:33:17,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:33:17,030 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:33:17,031 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:33:17,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2021-10-29 05:33:17,115 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/data/2a91051db/67f986bb03534b6bb4deddd1bc0c9379/FLAGa8183df43 [2021-10-29 05:33:17,689 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:33:17,689 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2021-10-29 05:33:17,707 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/data/2a91051db/67f986bb03534b6bb4deddd1bc0c9379/FLAGa8183df43 [2021-10-29 05:33:18,013 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/data/2a91051db/67f986bb03534b6bb4deddd1bc0c9379 [2021-10-29 05:33:18,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:33:18,018 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:33:18,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:33:18,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:33:18,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:33:18,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:33:18" (1/1) ... [2021-10-29 05:33:18,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fff8631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:18, skipping insertion in model container [2021-10-29 05:33:18,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:33:18" (1/1) ... [2021-10-29 05:33:18,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:33:18,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:33:18,239 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_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c[709,722] [2021-10-29 05:33:18,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:33:18,282 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:33:18,296 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_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c[709,722] [2021-10-29 05:33:18,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:33:18,325 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:33:18,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:18 WrapperNode [2021-10-29 05:33:18,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:33:18,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:33:18,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:33:18,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:33:18,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:18" (1/1) ... [2021-10-29 05:33:18,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:18" (1/1) ... [2021-10-29 05:33:18,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:33:18,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:33:18,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:33:18,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:33:18,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:18" (1/1) ... [2021-10-29 05:33:18,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:18" (1/1) ... [2021-10-29 05:33:18,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:18" (1/1) ... [2021-10-29 05:33:18,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:18" (1/1) ... [2021-10-29 05:33:18,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:18" (1/1) ... [2021-10-29 05:33:18,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:18" (1/1) ... [2021-10-29 05:33:18,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:18" (1/1) ... [2021-10-29 05:33:18,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:33:18,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:33:18,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:33:18,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:33:18,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:18" (1/1) ... [2021-10-29 05:33:18,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:33:18,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:33:18,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:33:18,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:33:18,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:33:18,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:33:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:33:18,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:33:18,834 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:33:18,834 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-29 05:33:18,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:33:18 BoogieIcfgContainer [2021-10-29 05:33:18,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:33:18,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:33:18,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:33:18,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:33:18,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:33:18" (1/3) ... [2021-10-29 05:33:18,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec9a67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:33:18, skipping insertion in model container [2021-10-29 05:33:18,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:18" (2/3) ... [2021-10-29 05:33:18,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec9a67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:33:18, skipping insertion in model container [2021-10-29 05:33:18,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:33:18" (3/3) ... [2021-10-29 05:33:18,863 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound20.c [2021-10-29 05:33:18,869 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:33:18,886 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-29 05:33:18,952 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:33:18,959 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 05:33:18,960 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-29 05:33:18,999 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 28 states have internal predecessors, (37), 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 05:33:19,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:33:19,004 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:33:19,004 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:33:19,005 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-29 05:33:19,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:33:19,026 INFO L85 PathProgramCache]: Analyzing trace with hash 114241630, now seen corresponding path program 1 times [2021-10-29 05:33:19,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:33:19,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822641595] [2021-10-29 05:33:19,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:33:19,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:33:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:33:19,182 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 05:33:19,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:33:19,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822641595] [2021-10-29 05:33:19,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822641595] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:33:19,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:33:19,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:33:19,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535099611] [2021-10-29 05:33:19,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:33:19,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:33:19,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:33:19,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:33:19,210 INFO L87 Difference]: Start difference. First operand has 29 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 28 states have internal predecessors, (37), 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 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 05:33:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:33:19,227 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2021-10-29 05:33:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:33:19,229 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-10-29 05:33:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:33:19,238 INFO L225 Difference]: With dead ends: 57 [2021-10-29 05:33:19,238 INFO L226 Difference]: Without dead ends: 27 [2021-10-29 05:33:19,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:33:19,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-29 05:33:19,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-29 05:33:19,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 26 states have internal predecessors, (28), 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 05:33:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-29 05:33:19,276 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 5 [2021-10-29 05:33:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:33:19,277 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-29 05:33:19,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 05:33:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-29 05:33:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:33:19,279 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:33:19,279 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:33:19,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:33:19,280 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-29 05:33:19,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:33:19,281 INFO L85 PathProgramCache]: Analyzing trace with hash 112890113, now seen corresponding path program 1 times [2021-10-29 05:33:19,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:33:19,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236243272] [2021-10-29 05:33:19,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:33:19,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:33:19,301 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:33:19,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854855479] [2021-10-29 05:33:19,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:33:19,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:33:19,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:33:19,305 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:33:19,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 05:33:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:33:19,386 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:33:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:33:19,449 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:33:19,451 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:33:19,452 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:33:19,455 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:33:19,455 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:33:19,456 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:33:19,456 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:33:19,456 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:33:19,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:33:19,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:33:19,685 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-10-29 05:33:19,687 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:33:19,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:33:19 BoogieIcfgContainer [2021-10-29 05:33:19,709 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:33:19,710 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:33:19,710 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:33:19,710 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:33:19,711 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:33:18" (3/4) ... [2021-10-29 05:33:19,714 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-29 05:33:19,715 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:33:19,717 INFO L168 Benchmark]: Toolchain (without parser) took 1697.68 ms. Allocated memory is still 109.1 MB. Free memory was 70.8 MB in the beginning and 43.2 MB in the end (delta: 27.6 MB). Peak memory consumption was 24.7 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:19,717 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 109.1 MB. Free memory is still 87.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:33:19,718 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.57 ms. Allocated memory is still 109.1 MB. Free memory was 70.6 MB in the beginning and 83.0 MB in the end (delta: -12.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:19,719 INFO L168 Benchmark]: Boogie Procedure Inliner took 80.14 ms. Allocated memory is still 109.1 MB. Free memory was 83.0 MB in the beginning and 81.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:19,720 INFO L168 Benchmark]: Boogie Preprocessor took 56.99 ms. Allocated memory is still 109.1 MB. Free memory was 81.4 MB in the beginning and 80.5 MB in the end (delta: 994.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:33:19,720 INFO L168 Benchmark]: RCFGBuilder took 370.81 ms. Allocated memory is still 109.1 MB. Free memory was 80.5 MB in the beginning and 68.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:19,721 INFO L168 Benchmark]: TraceAbstraction took 869.74 ms. Allocated memory is still 109.1 MB. Free memory was 68.4 MB in the beginning and 43.2 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:19,722 INFO L168 Benchmark]: Witness Printer took 4.91 ms. Allocated memory is still 109.1 MB. Free memory is still 43.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:33:19,736 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 109.1 MB. Free memory is still 87.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 306.57 ms. Allocated memory is still 109.1 MB. Free memory was 70.6 MB in the beginning and 83.0 MB in the end (delta: -12.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 80.14 ms. Allocated memory is still 109.1 MB. Free memory was 83.0 MB in the beginning and 81.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.99 ms. Allocated memory is still 109.1 MB. Free memory was 81.4 MB in the beginning and 80.5 MB in the end (delta: 994.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 370.81 ms. Allocated memory is still 109.1 MB. Free memory was 80.5 MB in the beginning and 68.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 869.74 ms. Allocated memory is still 109.1 MB. Free memory was 68.4 MB in the beginning and 43.2 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Witness Printer took 4.91 ms. Allocated memory is still 109.1 MB. Free memory is still 43.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * 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 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<20 [L17] COND TRUE !(cond) VAL [counter=1] [L19] reach_error() VAL [counter=1] - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, InterpolantAutomatonStates: 2, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 4 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces [2021-10-29 05:33:19,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:33:22,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:33:22,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:33:22,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:33:22,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:33:22,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:33:22,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:33:22,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:33:22,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:33:22,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:33:22,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:33:22,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:33:22,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:33:22,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:33:22,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:33:22,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:33:22,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:33:22,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:33:22,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:33:22,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:33:22,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:33:22,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:33:22,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:33:22,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:33:22,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:33:22,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:33:22,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:33:22,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:33:22,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:33:22,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:33:22,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:33:22,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:33:22,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:33:22,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:33:22,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:33:22,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:33:22,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:33:22,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:33:22,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:33:22,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:33:22,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:33:22,693 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-29 05:33:22,756 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:33:22,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:33:22,758 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:33:22,759 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:33:22,759 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:33:22,759 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:33:22,759 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:33:22,760 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:33:22,760 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:33:22,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:33:22,763 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:33:22,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:33:22,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:33:22,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:33:22,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:33:22,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:33:22,765 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:33:22,765 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-29 05:33:22,765 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-29 05:33:22,765 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:33:22,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:33:22,766 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:33:22,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:33:22,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:33:22,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 05:33:22,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:33:22,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:33:22,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:33:22,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:33:22,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:33:22,768 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-29 05:33:22,768 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-29 05:33:22,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:33:22,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:33:22,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:33:22,770 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8425a5d05ac446a6871721d80167c62d0d4f36c759d59becfd4b9bf0feba487 [2021-10-29 05:33:23,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:33:23,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:33:23,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:33:23,186 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:33:23,187 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:33:23,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2021-10-29 05:33:23,272 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/data/cf79530f9/7d7e6be1308c4ebaaeb0f7bacc2084cd/FLAG04ba678d2 [2021-10-29 05:33:23,849 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:33:23,850 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2021-10-29 05:33:23,864 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/data/cf79530f9/7d7e6be1308c4ebaaeb0f7bacc2084cd/FLAG04ba678d2 [2021-10-29 05:33:24,197 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/data/cf79530f9/7d7e6be1308c4ebaaeb0f7bacc2084cd [2021-10-29 05:33:24,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:33:24,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:33:24,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:33:24,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:33:24,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:33:24,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:33:24" (1/1) ... [2021-10-29 05:33:24,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@380febbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:24, skipping insertion in model container [2021-10-29 05:33:24,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:33:24" (1/1) ... [2021-10-29 05:33:24,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:33:24,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:33:24,401 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_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c[709,722] [2021-10-29 05:33:24,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:33:24,461 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:33:24,484 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_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c[709,722] [2021-10-29 05:33:24,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:33:24,555 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:33:24,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:24 WrapperNode [2021-10-29 05:33:24,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:33:24,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:33:24,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:33:24,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:33:24,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:24" (1/1) ... [2021-10-29 05:33:24,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:24" (1/1) ... [2021-10-29 05:33:24,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:33:24,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:33:24,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:33:24,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:33:24,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:24" (1/1) ... [2021-10-29 05:33:24,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:24" (1/1) ... [2021-10-29 05:33:24,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:24" (1/1) ... [2021-10-29 05:33:24,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:24" (1/1) ... [2021-10-29 05:33:24,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:24" (1/1) ... [2021-10-29 05:33:24,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:24" (1/1) ... [2021-10-29 05:33:24,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:24" (1/1) ... [2021-10-29 05:33:24,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:33:24,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:33:24,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:33:24,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:33:24,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:24" (1/1) ... [2021-10-29 05:33:24,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:33:24,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:33:24,716 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:33:24,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:33:24,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-29 05:33:24,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:33:24,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:33:24,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:33:36,085 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:33:36,087 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-29 05:33:36,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:33:36 BoogieIcfgContainer [2021-10-29 05:33:36,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:33:36,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:33:36,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:33:36,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:33:36,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:33:24" (1/3) ... [2021-10-29 05:33:36,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13bbc828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:33:36, skipping insertion in model container [2021-10-29 05:33:36,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:24" (2/3) ... [2021-10-29 05:33:36,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13bbc828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:33:36, skipping insertion in model container [2021-10-29 05:33:36,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:33:36" (3/3) ... [2021-10-29 05:33:36,101 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound20.c [2021-10-29 05:33:36,108 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:33:36,109 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-29 05:33:36,160 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:33:36,168 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 05:33:36,169 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-29 05:33:36,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 25 states have (on average 1.6) internal successors, (40), 31 states have internal predecessors, (40), 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 05:33:36,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-29 05:33:36,193 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:33:36,194 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-29 05:33:36,195 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-29 05:33:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:33:36,202 INFO L85 PathProgramCache]: Analyzing trace with hash 890922791, now seen corresponding path program 1 times [2021-10-29 05:33:36,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:33:36,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031367801] [2021-10-29 05:33:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:33:36,218 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:33:36,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:33:36,224 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:33:36,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-29 05:33:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:33:36,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-29 05:33:36,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:33:36,480 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 05:33:36,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:33:36,523 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 05:33:36,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:33:36,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031367801] [2021-10-29 05:33:36,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031367801] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:33:36,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:33:36,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 05:33:36,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616874185] [2021-10-29 05:33:36,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:33:36,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:33:36,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:33:36,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:33:36,551 INFO L87 Difference]: Start difference. First operand has 32 states, 25 states have (on average 1.6) internal successors, (40), 31 states have internal predecessors, (40), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 05:33:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:33:36,569 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2021-10-29 05:33:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:33:36,571 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 05:33:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:33:36,579 INFO L225 Difference]: With dead ends: 62 [2021-10-29 05:33:36,580 INFO L226 Difference]: Without dead ends: 28 [2021-10-29 05:33:36,582 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:33:36,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-29 05:33:36,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-29 05:33:36,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 27 states have internal predecessors, (29), 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 05:33:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-29 05:33:36,616 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2021-10-29 05:33:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:33:36,617 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-29 05:33:36,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 05:33:36,617 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-29 05:33:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-29 05:33:36,618 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:33:36,618 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-29 05:33:36,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:33:36,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:33:36,834 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-29 05:33:36,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:33:36,841 INFO L85 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-29 05:33:36,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:33:36,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042468724] [2021-10-29 05:33:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:33:36,844 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:33:36,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:33:36,845 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:33:36,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-29 05:33:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:33:36,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 05:33:36,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:33:37,427 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 05:33:37,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:33:44,373 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 05:33:44,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:33:44,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042468724] [2021-10-29 05:33:44,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042468724] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:33:44,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:33:44,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-29 05:33:44,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61044750] [2021-10-29 05:33:44,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 05:33:44,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:33:44,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 05:33:44,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:33:44,379 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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 05:34:04,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:34:04,614 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-10-29 05:34:04,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:34:04,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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 6 [2021-10-29 05:34:04,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:34:04,617 INFO L225 Difference]: With dead ends: 39 [2021-10-29 05:34:04,617 INFO L226 Difference]: Without dead ends: 35 [2021-10-29 05:34:04,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-29 05:34:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-29 05:34:04,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-10-29 05:34:04,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 32 states have internal predecessors, (35), 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 05:34:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-10-29 05:34:04,626 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 6 [2021-10-29 05:34:04,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:34:04,627 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-10-29 05:34:04,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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 05:34:04,627 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-10-29 05:34:04,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 05:34:04,628 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:34:04,628 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:34:04,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:34:04,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:34:04,829 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-29 05:34:04,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:34:04,830 INFO L85 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2021-10-29 05:34:04,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:34:04,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613293169] [2021-10-29 05:34:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:34:04,831 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:34:04,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:34:04,837 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:34:04,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-29 05:34:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:34:06,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 05:34:06,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:34:08,942 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 05:34:08,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:34:17,186 WARN L860 $PredicateComparison]: unable to prove that (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0))) is different from true [2021-10-29 05:34:38,815 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 05:34:38,816 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:34:38,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613293169] [2021-10-29 05:34:38,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613293169] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:34:38,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:34:38,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-10-29 05:34:38,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971061577] [2021-10-29 05:34:38,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 05:34:38,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:34:38,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 05:34:38,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=31, Unknown=1, NotChecked=10, Total=56 [2021-10-29 05:34:38,820 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 05:34:55,182 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~r~0 (_ bv1 32)) (= c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~x~0) (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0))) (= c_currentRoundingMode roundNearestTiesToEven) (forall ((v_ULTIMATE.start_main_~a~0_11 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (let ((.cse1 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)) v_ULTIMATE.start_main_~a~0_11))) (fp.sub c_currentRoundingMode .cse1 .cse1))) (_ bv0 32)))) is different from true [2021-10-29 05:34:57,731 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~r~0 (_ bv1 32)) (= c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~x~0) (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-10-29 05:35:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:35:56,340 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-10-29 05:35:56,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 05:35:56,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 05:35:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:35:56,342 INFO L225 Difference]: With dead ends: 36 [2021-10-29 05:35:56,342 INFO L226 Difference]: Without dead ends: 33 [2021-10-29 05:35:56,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=26, Invalid=55, Unknown=3, NotChecked=48, Total=132 [2021-10-29 05:35:56,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-29 05:35:56,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-10-29 05:35:56,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 30 states have internal predecessors, (33), 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 05:35:56,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-10-29 05:35:56,352 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 8 [2021-10-29 05:35:56,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:35:56,353 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-10-29 05:35:56,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 05:35:56,353 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-10-29 05:35:56,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-29 05:35:56,354 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:35:56,354 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:35:56,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:35:56,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:35:56,575 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-29 05:35:56,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:35:56,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1248817364, now seen corresponding path program 1 times [2021-10-29 05:35:56,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:35:56,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664936863] [2021-10-29 05:35:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:35:56,577 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:35:56,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:35:56,579 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:35:56,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-29 05:35:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:35:57,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:35:57,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:35:57,208 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 05:35:57,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:35:57,392 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 05:35:57,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:35:57,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664936863] [2021-10-29 05:35:57,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664936863] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:35:57,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:35:57,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-29 05:35:57,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620592741] [2021-10-29 05:35:57,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:35:57,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:35:57,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:35:57,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:35:57,395 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 05:36:00,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:36:00,227 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-10-29 05:36:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:36:00,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 9 [2021-10-29 05:36:00,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:36:00,229 INFO L225 Difference]: With dead ends: 64 [2021-10-29 05:36:00,230 INFO L226 Difference]: Without dead ends: 50 [2021-10-29 05:36:00,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:36:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-29 05:36:00,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2021-10-29 05:36:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 35 states have internal predecessors, (39), 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 05:36:00,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-10-29 05:36:00,242 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 9 [2021-10-29 05:36:00,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:36:00,243 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-10-29 05:36:00,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 05:36:00,243 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-10-29 05:36:00,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 05:36:00,244 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:36:00,244 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:36:00,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-29 05:36:00,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:36:00,469 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-29 05:36:00,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:36:00,469 INFO L85 PathProgramCache]: Analyzing trace with hash 852768432, now seen corresponding path program 1 times [2021-10-29 05:36:00,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:36:00,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712666439] [2021-10-29 05:36:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:36:00,470 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:36:00,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:36:00,471 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:36:00,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-29 05:36:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:36:02,194 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:36:04,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:36:04,713 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-29 05:36:04,713 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:36:04,714 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:36:04,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:36:04,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:36:04,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:36:04,718 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:36:04,718 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:36:04,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-29 05:36:04,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:36:04,922 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-10-29 05:36:04,925 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:36:04,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:36:04 BoogieIcfgContainer [2021-10-29 05:36:04,952 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:36:04,953 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:36:04,953 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:36:04,954 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:36:04,954 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:33:36" (3/4) ... [2021-10-29 05:36:04,957 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 05:36:05,022 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:36:05,023 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:36:05,025 INFO L168 Benchmark]: Toolchain (without parser) took 160821.80 ms. Allocated memory was 58.7 MB in the beginning and 83.9 MB in the end (delta: 25.2 MB). Free memory was 36.6 MB in the beginning and 47.6 MB in the end (delta: -11.0 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:05,025 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 58.7 MB. Free memory is still 39.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:36:05,026 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.05 ms. Allocated memory was 58.7 MB in the beginning and 83.9 MB in the end (delta: 25.2 MB). Free memory was 36.4 MB in the beginning and 66.9 MB in the end (delta: -30.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:05,027 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.72 ms. Allocated memory is still 83.9 MB. Free memory was 66.9 MB in the beginning and 65.1 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:36:05,027 INFO L168 Benchmark]: Boogie Preprocessor took 44.03 ms. Allocated memory is still 83.9 MB. Free memory was 65.1 MB in the beginning and 63.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:36:05,028 INFO L168 Benchmark]: RCFGBuilder took 11420.97 ms. Allocated memory is still 83.9 MB. Free memory was 63.6 MB in the beginning and 52.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:05,029 INFO L168 Benchmark]: TraceAbstraction took 148860.50 ms. Allocated memory is still 83.9 MB. Free memory was 51.8 MB in the beginning and 49.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:05,030 INFO L168 Benchmark]: Witness Printer took 69.86 ms. Allocated memory is still 83.9 MB. Free memory was 49.1 MB in the beginning and 47.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:36:05,050 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 58.7 MB. Free memory is still 39.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 353.05 ms. Allocated memory was 58.7 MB in the beginning and 83.9 MB in the end (delta: 25.2 MB). Free memory was 36.4 MB in the beginning and 66.9 MB in the end (delta: -30.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 65.72 ms. Allocated memory is still 83.9 MB. Free memory was 66.9 MB in the beginning and 65.1 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.03 ms. Allocated memory is still 83.9 MB. Free memory was 65.1 MB in the beginning and 63.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 11420.97 ms. Allocated memory is still 83.9 MB. Free memory was 63.6 MB in the beginning and 52.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 148860.50 ms. Allocated memory is still 83.9 MB. Free memory was 51.8 MB in the beginning and 49.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.1 MB. Max. memory is 16.1 GB. * Witness Printer took 69.86 ms. Allocated memory is still 83.9 MB. Free memory was 49.1 MB in the beginning and 47.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * 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 - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<20 [L17] COND FALSE !(!(cond)) VAL [counter=1] [L17] COND FALSE !(!(cond)) VAL [counter=1] [L17] COND TRUE !(cond) VAL [counter=1] [L19] reach_error() VAL [counter=1] - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 148.7s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 100.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 104 SDtfs, 68 SDslu, 171 SDs, 0 SdLazy, 107 SolverSat, 21 SolverUnsat, 28 SolverUnknown, 0 SolverNotchecked, 82.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 34.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, InterpolantAutomatonStates: 21, 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, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 40.4s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 50 ConstructedInterpolants, 1 QuantifiedInterpolants, 320 SizeOfPredicates, 10 NumberOfNonLiveVariables, 140 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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 incorrect! [2021-10-29 05:36:05,302 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-29 05:36:05,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad720b1e-6c05-4fd3-a284-5cfbb61c7e58/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...