./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8 --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 05bc981af08af727cc8a5fe70f318cd57004d0de .............................................................................................................................................................................................................................................................................................................................. 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_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8 --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 05bc981af08af727cc8a5fe70f318cd57004d0de ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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-4e77c04 [2021-10-13 07:58:54,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:58:54,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:58:54,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:58:54,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:58:54,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:58:54,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:58:54,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:58:54,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:58:54,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:58:54,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:58:54,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:58:54,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:58:54,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:58:54,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:58:54,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:58:54,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:58:54,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:58:54,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:58:54,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:58:54,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:58:54,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:58:54,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:58:54,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:58:54,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:58:54,827 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:58:54,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:58:54,829 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:58:54,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:58:54,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:58:54,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:58:54,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:58:54,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:58:54,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:58:54,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:58:54,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:58:54,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:58:54,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:58:54,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:58:54,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:58:54,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:58:54,842 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:58:54,869 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:58:54,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:58:54,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:58:54,871 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:58:54,872 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:58:54,872 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:58:54,872 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:58:54,873 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:58:54,873 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:58:54,874 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:58:54,874 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:58:54,874 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:58:54,875 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:58:54,879 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:58:54,880 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:58:54,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:58:54,881 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:58:54,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:58:54,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:58:54,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:58:54,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:58:54,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:58:54,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:58:54,885 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:58:54,885 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:58:54,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:58:54,885 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:58:54,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:58:54,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:58:54,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:58:54,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:58:54,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:58:54,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:58:54,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:58:54,890 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:58:54,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:58:54,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:58:54,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:58:54,892 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:58:54,892 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_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05bc981af08af727cc8a5fe70f318cd57004d0de [2021-10-13 07:58:55,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:58:55,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:58:55,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:58:55,317 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:58:55,318 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:58:55,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound5.c [2021-10-13 07:58:55,409 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/data/af9923956/32a025ac59fc4c049414d79a64ca7dcc/FLAG2fc2ff900 [2021-10-13 07:58:56,032 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:58:56,037 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound5.c [2021-10-13 07:58:56,049 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/data/af9923956/32a025ac59fc4c049414d79a64ca7dcc/FLAG2fc2ff900 [2021-10-13 07:58:56,348 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/data/af9923956/32a025ac59fc4c049414d79a64ca7dcc [2021-10-13 07:58:56,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:58:56,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:58:56,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:58:56,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:58:56,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:58:56,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:58:56" (1/1) ... [2021-10-13 07:58:56,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8553684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:56, skipping insertion in model container [2021-10-13 07:58:56,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:58:56" (1/1) ... [2021-10-13 07:58:56,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:58:56,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:58:56,588 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_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound5.c[709,722] [2021-10-13 07:58:56,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:58:56,643 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:58:56,654 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_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound5.c[709,722] [2021-10-13 07:58:56,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:58:56,682 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:58:56,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:56 WrapperNode [2021-10-13 07:58:56,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:58:56,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:58:56,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:58:56,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:58:56,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:56" (1/1) ... [2021-10-13 07:58:56,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:56" (1/1) ... [2021-10-13 07:58:56,749 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:58:56,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:58:56,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:58:56,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:58:56,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:56" (1/1) ... [2021-10-13 07:58:56,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:56" (1/1) ... [2021-10-13 07:58:56,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:56" (1/1) ... [2021-10-13 07:58:56,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:56" (1/1) ... [2021-10-13 07:58:56,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:56" (1/1) ... [2021-10-13 07:58:56,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:56" (1/1) ... [2021-10-13 07:58:56,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:56" (1/1) ... [2021-10-13 07:58:56,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:58:56,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:58:56,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:58:56,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:58:56,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:56" (1/1) ... [2021-10-13 07:58:56,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:58:56,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:58:56,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:58:56,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:58:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:58:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:58:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:58:56,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:58:57,183 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:58:57,184 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-13 07:58:57,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:58:57 BoogieIcfgContainer [2021-10-13 07:58:57,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:58:57,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:58:57,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:58:57,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:58:57,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:58:56" (1/3) ... [2021-10-13 07:58:57,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b1f6d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:58:57, skipping insertion in model container [2021-10-13 07:58:57,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:58:56" (2/3) ... [2021-10-13 07:58:57,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b1f6d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:58:57, skipping insertion in model container [2021-10-13 07:58:57,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:58:57" (3/3) ... [2021-10-13 07:58:57,196 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound5.c [2021-10-13 07:58:57,203 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:58:57,203 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-13 07:58:57,258 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:58:57,266 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, mConcurrency=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 [2021-10-13 07:58:57,266 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-13 07:58:57,284 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) [2021-10-13 07:58:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:58:57,289 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:58:57,290 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:58:57,291 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)] === [2021-10-13 07:58:57,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:58:57,300 INFO L82 PathProgramCache]: Analyzing trace with hash 114241630, now seen corresponding path program 1 times [2021-10-13 07:58:57,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:58:57,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790067541] [2021-10-13 07:58:57,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:58:57,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:58:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:58:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:58:57,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:58:57,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790067541] [2021-10-13 07:58:57,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790067541] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:58:57,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:58:57,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:58:57,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186639786] [2021-10-13 07:58:57,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:58:57,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:58:57,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:58:57,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:58:57,539 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) [2021-10-13 07:58:57,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:58:57,556 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2021-10-13 07:58:57,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:58:57,558 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 [2021-10-13 07:58:57,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:58:57,568 INFO L225 Difference]: With dead ends: 57 [2021-10-13 07:58:57,568 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 07:58:57,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:58:57,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 07:58:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-13 07:58:57,615 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) [2021-10-13 07:58:57,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-13 07:58:57,620 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 5 [2021-10-13 07:58:57,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:58:57,620 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-13 07:58:57,621 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) [2021-10-13 07:58:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-13 07:58:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:58:57,622 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:58:57,623 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:58:57,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:58:57,624 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)] === [2021-10-13 07:58:57,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:58:57,631 INFO L82 PathProgramCache]: Analyzing trace with hash 112890113, now seen corresponding path program 1 times [2021-10-13 07:58:57,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:58:57,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43873089] [2021-10-13 07:58:57,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:58:57,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:58:57,668 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:58:57,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732456384] [2021-10-13 07:58:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:58:57,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:58:57,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:58:57,671 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:58:57,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:58:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:58:57,754 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:58:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:58:57,794 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-13 07:58:57,794 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:58:57,796 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:58:57,798 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:58:57,799 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:58:57,833 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:58:57,833 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:58:57,834 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:58:57,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:58:58,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:58:58,053 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:58:58,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:58:58 BoogieIcfgContainer [2021-10-13 07:58:58,081 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:58:58,082 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:58:58,082 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:58:58,082 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:58:58,083 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:58:57" (3/4) ... [2021-10-13 07:58:58,087 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:58:58,087 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:58:58,089 INFO L168 Benchmark]: Toolchain (without parser) took 1734.76 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 57.1 MB in the beginning and 94.0 MB in the end (delta: -36.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:58:58,090 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 98.6 MB. Free memory was 73.3 MB in the beginning and 73.2 MB in the end (delta: 56.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:58:58,091 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.01 ms. Allocated memory is still 98.6 MB. Free memory was 56.9 MB in the beginning and 72.5 MB in the end (delta: -15.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:58:58,092 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.27 ms. Allocated memory is still 98.6 MB. Free memory was 72.5 MB in the beginning and 70.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:58:58,093 INFO L168 Benchmark]: Boogie Preprocessor took 28.84 ms. Allocated memory is still 98.6 MB. Free memory was 70.7 MB in the beginning and 69.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:58:58,104 INFO L168 Benchmark]: RCFGBuilder took 407.55 ms. Allocated memory is still 98.6 MB. Free memory was 69.6 MB in the beginning and 58.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:58:58,105 INFO L168 Benchmark]: TraceAbstraction took 892.18 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 57.8 MB in the beginning and 94.3 MB in the end (delta: -36.5 MB). Peak memory consumption was 27.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:58:58,106 INFO L168 Benchmark]: Witness Printer took 5.36 ms. Allocated memory is still 119.5 MB. Free memory was 94.3 MB in the beginning and 94.0 MB in the end (delta: 306.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:58:58,111 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 98.6 MB. Free memory was 73.3 MB in the beginning and 73.2 MB in the end (delta: 56.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 328.01 ms. Allocated memory is still 98.6 MB. Free memory was 56.9 MB in the beginning and 72.5 MB in the end (delta: -15.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 65.27 ms. Allocated memory is still 98.6 MB. Free memory was 72.5 MB in the beginning and 70.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.84 ms. Allocated memory is still 98.6 MB. Free memory was 70.7 MB in the beginning and 69.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 407.55 ms. Allocated memory is still 98.6 MB. Free memory was 69.6 MB in the beginning and 58.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 892.18 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 57.8 MB in the beginning and 94.3 MB in the end (delta: -36.5 MB). Peak memory consumption was 27.7 MB. Max. memory is 16.1 GB. * Witness Printer took 5.36 ms. Allocated memory is still 119.5 MB. Free memory was 94.3 MB in the beginning and 94.0 MB in the end (delta: 306.1 kB). 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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++<5 [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: 796.4ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 11.0ms, AutomataDifference: 52.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms 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, 0.0ms DumpTime, AutomataMinimizationStatistics: 26.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 15.3ms SsaConstructionTime, 64.1ms SatisfiabilityAnalysisTime, 51.0ms 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 [2021-10-13 07:58:58,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/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-4e77c04 [2021-10-13 07:59:00,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:59:00,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:59:00,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:59:00,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:59:00,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:59:00,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:59:00,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:59:00,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:59:00,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:59:00,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:59:00,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:59:00,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:59:00,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:59:00,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:59:00,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:59:00,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:59:00,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:59:00,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:59:00,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:59:00,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:59:00,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:59:00,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:59:00,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:59:00,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:59:00,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:59:00,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:59:00,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:59:00,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:59:00,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:59:00,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:59:00,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:59:00,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:59:00,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:59:00,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:59:00,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:59:00,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:59:00,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:59:00,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:59:00,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:59:00,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:59:00,996 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:59:01,054 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:59:01,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:59:01,056 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:59:01,056 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:59:01,056 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:59:01,057 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:59:01,057 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:59:01,057 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:59:01,057 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:59:01,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:59:01,060 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:59:01,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:59:01,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:59:01,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:59:01,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:59:01,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:59:01,061 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:59:01,062 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:59:01,062 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:59:01,062 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:59:01,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:59:01,062 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:59:01,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:59:01,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:59:01,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:59:01,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:59:01,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:59:01,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:59:01,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:59:01,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:59:01,064 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:59:01,065 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:59:01,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:59:01,065 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:59:01,065 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:59:01,066 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_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05bc981af08af727cc8a5fe70f318cd57004d0de [2021-10-13 07:59:01,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:59:01,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:59:01,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:59:01,541 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:59:01,541 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:59:01,542 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound5.c [2021-10-13 07:59:01,630 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/data/e87025994/b669f1b52aac4924ade1a6e13330ae8a/FLAGc50cd58d2 [2021-10-13 07:59:02,346 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:59:02,352 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound5.c [2021-10-13 07:59:02,361 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/data/e87025994/b669f1b52aac4924ade1a6e13330ae8a/FLAGc50cd58d2 [2021-10-13 07:59:02,679 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/data/e87025994/b669f1b52aac4924ade1a6e13330ae8a [2021-10-13 07:59:02,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:59:02,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:59:02,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:59:02,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:59:02,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:59:02,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:59:02" (1/1) ... [2021-10-13 07:59:02,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b77774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:02, skipping insertion in model container [2021-10-13 07:59:02,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:59:02" (1/1) ... [2021-10-13 07:59:02,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:59:02,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:59:02,947 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_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound5.c[709,722] [2021-10-13 07:59:02,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:59:02,993 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:59:03,009 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_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound5.c[709,722] [2021-10-13 07:59:03,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:59:03,106 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:59:03,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:03 WrapperNode [2021-10-13 07:59:03,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:59:03,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:59:03,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:59:03,111 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:59:03,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:03" (1/1) ... [2021-10-13 07:59:03,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:03" (1/1) ... [2021-10-13 07:59:03,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:59:03,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:59:03,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:59:03,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:59:03,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:03" (1/1) ... [2021-10-13 07:59:03,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:03" (1/1) ... [2021-10-13 07:59:03,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:03" (1/1) ... [2021-10-13 07:59:03,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:03" (1/1) ... [2021-10-13 07:59:03,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:03" (1/1) ... [2021-10-13 07:59:03,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:03" (1/1) ... [2021-10-13 07:59:03,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:03" (1/1) ... [2021-10-13 07:59:03,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:59:03,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:59:03,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:59:03,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:59:03,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:03" (1/1) ... [2021-10-13 07:59:03,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:59:03,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:59:03,267 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:59:03,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:59:03,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:59:03,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:59:03,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:59:03,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:59:14,089 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:59:14,089 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-13 07:59:14,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:59:14 BoogieIcfgContainer [2021-10-13 07:59:14,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:59:14,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:59:14,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:59:14,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:59:14,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:59:02" (1/3) ... [2021-10-13 07:59:14,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e881552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:59:14, skipping insertion in model container [2021-10-13 07:59:14,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:03" (2/3) ... [2021-10-13 07:59:14,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e881552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:59:14, skipping insertion in model container [2021-10-13 07:59:14,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:59:14" (3/3) ... [2021-10-13 07:59:14,102 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound5.c [2021-10-13 07:59:14,109 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:59:14,109 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-13 07:59:14,168 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:59:14,176 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, mConcurrency=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 [2021-10-13 07:59:14,176 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-13 07:59:14,192 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) [2021-10-13 07:59:14,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:59:14,200 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:59:14,201 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:59:14,202 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)] === [2021-10-13 07:59:14,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:59:14,219 INFO L82 PathProgramCache]: Analyzing trace with hash 890922791, now seen corresponding path program 1 times [2021-10-13 07:59:14,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:59:14,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584251693] [2021-10-13 07:59:14,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:59:14,245 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:59:14,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:59:14,248 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:59:14,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:59:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:59:14,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:59:14,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:59:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:59:14,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:59:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:59:14,549 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:59:14,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584251693] [2021-10-13 07:59:14,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584251693] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:59:14,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:59:14,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:59:14,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612238281] [2021-10-13 07:59:14,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:59:14,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:59:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:59:14,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:59:14,574 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) [2021-10-13 07:59:14,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:59:14,592 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2021-10-13 07:59:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:59:14,593 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 [2021-10-13 07:59:14,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:59:14,601 INFO L225 Difference]: With dead ends: 62 [2021-10-13 07:59:14,602 INFO L226 Difference]: Without dead ends: 28 [2021-10-13 07:59:14,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:59:14,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-13 07:59:14,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-13 07:59:14,635 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) [2021-10-13 07:59:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-13 07:59:14,638 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2021-10-13 07:59:14,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:59:14,638 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-13 07:59:14,639 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) [2021-10-13 07:59:14,639 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-13 07:59:14,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:59:14,640 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:59:14,640 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:59:14,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:59:14,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:59:14,859 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)] === [2021-10-13 07:59:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:59:14,860 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-13 07:59:14,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:59:14,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607477517] [2021-10-13 07:59:14,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:59:14,861 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:59:14,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:59:14,863 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:59:14,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:59:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:59:15,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:59:15,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:59:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:59:15,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:59:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:59:25,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:59:25,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607477517] [2021-10-13 07:59:25,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607477517] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:59:25,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:59:25,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-13 07:59:25,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983343148] [2021-10-13 07:59:25,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:59:25,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:59:25,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:59:25,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:59:25,245 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) [2021-10-13 07:59:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:59:47,484 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-10-13 07:59:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:59:47,485 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 [2021-10-13 07:59:47,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:59:47,486 INFO L225 Difference]: With dead ends: 39 [2021-10-13 07:59:47,486 INFO L226 Difference]: Without dead ends: 35 [2021-10-13 07:59:47,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7238.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:59:47,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-13 07:59:47,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-10-13 07:59:47,495 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) [2021-10-13 07:59:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-10-13 07:59:47,497 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 6 [2021-10-13 07:59:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:59:47,497 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-10-13 07:59:47,498 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) [2021-10-13 07:59:47,498 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-10-13 07:59:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:59:47,499 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:59:47,499 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:59:47,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-13 07:59:47,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:59:47,731 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)] === [2021-10-13 07:59:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:59:47,732 INFO L82 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2021-10-13 07:59:47,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:59:47,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469270832] [2021-10-13 07:59:47,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:59:47,734 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:59:47,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:59:47,738 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:59:47,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:59:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:59:48,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:59:48,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:00:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:00:01,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:00:08,941 WARN L838 $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 false [2021-10-13 08:00:10,979 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 [2021-10-13 08:00:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:00:34,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:00:34,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469270832] [2021-10-13 08:00:34,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469270832] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:00:34,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:00:34,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-10-13 08:00:34,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766419146] [2021-10-13 08:00:34,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:00:34,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:00:34,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:00:34,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=29, Unknown=3, NotChecked=10, Total=56 [2021-10-13 08:00:34,459 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) [2021-10-13 08:00:44,670 WARN L207 SmtUtils]: Spent 5.46 s on a formula simplification that was a NOOP. DAG size: 14 [2021-10-13 08:00:50,147 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 [2021-10-13 08:00:52,820 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 [2021-10-13 08:02:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:00,976 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-10-13 08:02:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:02:00,977 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 [2021-10-13 08:02:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:00,978 INFO L225 Difference]: With dead ends: 37 [2021-10-13 08:02:00,978 INFO L226 Difference]: Without dead ends: 34 [2021-10-13 08:02:00,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41282.6ms TimeCoverageRelationStatistics Valid=26, Invalid=53, Unknown=5, NotChecked=48, Total=132 [2021-10-13 08:02:00,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-13 08:02:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-10-13 08:02:00,984 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) [2021-10-13 08:02:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-10-13 08:02:00,985 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 8 [2021-10-13 08:02:00,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:00,986 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-10-13 08:02:00,986 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) [2021-10-13 08:02:00,987 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-10-13 08:02:00,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 08:02:00,987 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:00,987 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:01,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:01,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:02:01,199 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)] === [2021-10-13 08:02:01,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:01,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1248817364, now seen corresponding path program 1 times [2021-10-13 08:02:01,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:01,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040399548] [2021-10-13 08:02:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:01,201 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:01,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:01,205 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:01,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 08:02:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:01,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:02:01,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:01,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:02,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:02,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040399548] [2021-10-13 08:02:02,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040399548] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:02:02,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:02:02,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 08:02:02,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336101699] [2021-10-13 08:02:02,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:02:02,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:02,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:02:02,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:02:02,025 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) [2021-10-13 08:02:03,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:03,575 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-10-13 08:02:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:02:03,576 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 [2021-10-13 08:02:03,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:03,577 INFO L225 Difference]: With dead ends: 64 [2021-10-13 08:02:03,578 INFO L226 Difference]: Without dead ends: 50 [2021-10-13 08:02:03,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:02:03,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-13 08:02:03,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2021-10-13 08:02:03,590 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) [2021-10-13 08:02:03,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-10-13 08:02:03,591 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 9 [2021-10-13 08:02:03,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:03,591 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-10-13 08:02:03,591 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) [2021-10-13 08:02:03,591 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-10-13 08:02:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 08:02:03,592 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:03,592 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:03,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:03,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:02:03,792 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)] === [2021-10-13 08:02:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:03,793 INFO L82 PathProgramCache]: Analyzing trace with hash 852768432, now seen corresponding path program 1 times [2021-10-13 08:02:03,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:03,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580711521] [2021-10-13 08:02:03,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:03,794 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:03,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:03,796 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:03,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 08:02:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 08:02:05,526 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 08:02:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 08:02:21,083 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 08:02:21,084 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 08:02:21,085 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:21,087 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:21,088 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:21,088 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:21,089 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:21,089 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:02:21,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-13 08:02:21,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:02:21,296 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:02:21,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:02:21 BoogieIcfgContainer [2021-10-13 08:02:21,326 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:02:21,327 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:02:21,327 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:02:21,327 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:02:21,328 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:59:14" (3/4) ... [2021-10-13 08:02:21,331 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 08:02:21,402 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:02:21,402 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:02:21,405 INFO L168 Benchmark]: Toolchain (without parser) took 198719.93 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 40.4 MB in the beginning and 47.1 MB in the end (delta: -6.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:21,406 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 60.8 MB. Free memory is still 40.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:02:21,407 INFO L168 Benchmark]: CACSL2BoogieTranslator took 421.40 ms. Allocated memory is still 60.8 MB. Free memory was 40.2 MB in the beginning and 43.9 MB in the end (delta: -3.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:21,409 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.79 ms. Allocated memory is still 60.8 MB. Free memory was 43.9 MB in the beginning and 42.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:02:21,410 INFO L168 Benchmark]: Boogie Preprocessor took 42.56 ms. Allocated memory is still 60.8 MB. Free memory was 42.3 MB in the beginning and 40.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:02:21,410 INFO L168 Benchmark]: RCFGBuilder took 10880.56 ms. Allocated memory is still 60.8 MB. Free memory was 40.8 MB in the beginning and 29.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:21,411 INFO L168 Benchmark]: TraceAbstraction took 187232.54 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 29.1 MB in the beginning and 48.6 MB in the end (delta: -19.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:02:21,412 INFO L168 Benchmark]: Witness Printer took 76.67 ms. Allocated memory is still 75.5 MB. Free memory was 48.6 MB in the beginning and 47.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:21,417 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 60.8 MB. Free memory is still 40.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 421.40 ms. Allocated memory is still 60.8 MB. Free memory was 40.2 MB in the beginning and 43.9 MB in the end (delta: -3.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.79 ms. Allocated memory is still 60.8 MB. Free memory was 43.9 MB in the beginning and 42.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.56 ms. Allocated memory is still 60.8 MB. Free memory was 42.3 MB in the beginning and 40.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 10880.56 ms. Allocated memory is still 60.8 MB. Free memory was 40.8 MB in the beginning and 29.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 187232.54 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 29.1 MB in the beginning and 48.6 MB in the end (delta: -19.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 76.67 ms. Allocated memory is still 75.5 MB. Free memory was 48.6 MB in the beginning and 47.1 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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++<5 [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: 187129.1ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 15.0ms, AutomataDifference: 110367.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 113 SDtfs, 48 SDslu, 207 SDs, 0 SdLazy, 79 SolverSat, 15 SolverUnsat, 34 SolverUnknown, 0 SolverNotchecked, 89926.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 48769.1ms Time, 0.0ms 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, 0.0ms DumpTime, AutomataMinimizationStatistics: 45.1ms AutomataMinimizationTime, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 52.6ms SsaConstructionTime, 3351.9ms SatisfiabilityAnalysisTime, 56306.0ms InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 50 ConstructedInterpolants, 2 QuantifiedInterpolants, 341 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! [2021-10-13 08:02:21,647 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-13 08:02:21,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51b14c6d-f9ae-463d-ac2e-8160467bdc8e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...