./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bAnd5.i --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_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/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_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/bAnd5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/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_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/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 a13961418fec0d16c53db1d204e2c00858b0a3a5 ........................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/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_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/bAnd5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/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_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/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 a13961418fec0d16c53db1d204e2c00858b0a3a5 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:36:26,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:36:26,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:36:26,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:36:26,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:36:26,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:36:26,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:36:26,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:36:26,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:36:26,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:36:26,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:36:26,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:36:26,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:36:26,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:36:26,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:36:26,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:36:26,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:36:26,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:36:26,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:36:26,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:36:26,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:36:26,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:36:26,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:36:26,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:36:26,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:36:26,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:36:26,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:36:26,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:36:26,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:36:26,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:36:26,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:36:26,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:36:26,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:36:26,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:36:26,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:36:26,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:36:26,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:36:26,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:36:26,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:36:26,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:36:26,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:36:26,861 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:36:26,901 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:36:26,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:36:26,904 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:36:26,904 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:36:26,905 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:36:26,905 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:36:26,906 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:36:26,906 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:36:26,912 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:36:26,912 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:36:26,913 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:36:26,914 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:36:26,914 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:36:26,914 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:36:26,915 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:36:26,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:36:26,916 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:36:26,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:36:26,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:36:26,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:36:26,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:36:26,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:36:26,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:36:26,918 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:36:26,918 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:36:26,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:36:26,919 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:36:26,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:36:26,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:36:26,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:36:26,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:36:26,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:36:26,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:36:26,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:36:26,923 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:36:26,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:36:26,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:36:26,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:36:26,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:36:26,924 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_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a13961418fec0d16c53db1d204e2c00858b0a3a5 [2021-10-13 07:36:27,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:36:27,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:36:27,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:36:27,270 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:36:27,274 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:36:27,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-crafted/bAnd5.i [2021-10-13 07:36:27,355 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/data/1676723ba/f0eb28c10e2646e6a78b0118afe4ae29/FLAG053146b81 [2021-10-13 07:36:27,834 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:36:27,834 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/sv-benchmarks/c/array-crafted/bAnd5.i [2021-10-13 07:36:27,840 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/data/1676723ba/f0eb28c10e2646e6a78b0118afe4ae29/FLAG053146b81 [2021-10-13 07:36:28,233 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/data/1676723ba/f0eb28c10e2646e6a78b0118afe4ae29 [2021-10-13 07:36:28,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:36:28,239 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:36:28,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:36:28,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:36:28,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:36:28,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:36:28" (1/1) ... [2021-10-13 07:36:28,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d1b924d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:28, skipping insertion in model container [2021-10-13 07:36:28,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:36:28" (1/1) ... [2021-10-13 07:36:28,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:36:28,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:36:28,449 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_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-10-13 07:36:28,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:36:28,459 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:36:28,480 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_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-10-13 07:36:28,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:36:28,494 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:36:28,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:28 WrapperNode [2021-10-13 07:36:28,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:36:28,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:36:28,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:36:28,496 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:36:28,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:28" (1/1) ... [2021-10-13 07:36:28,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:28" (1/1) ... [2021-10-13 07:36:28,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:36:28,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:36:28,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:36:28,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:36:28,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:28" (1/1) ... [2021-10-13 07:36:28,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:28" (1/1) ... [2021-10-13 07:36:28,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:28" (1/1) ... [2021-10-13 07:36:28,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:28" (1/1) ... [2021-10-13 07:36:28,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:28" (1/1) ... [2021-10-13 07:36:28,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:28" (1/1) ... [2021-10-13 07:36:28,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:28" (1/1) ... [2021-10-13 07:36:28,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:36:28,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:36:28,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:36:28,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:36:28,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:28" (1/1) ... [2021-10-13 07:36:28,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:36:28,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:36:28,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:36:28,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:36:28,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:36:28,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:36:28,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:36:28,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:36:28,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:36:28,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:36:28,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:36:29,004 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:36:29,004 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 07:36:29,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:36:29 BoogieIcfgContainer [2021-10-13 07:36:29,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:36:29,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:36:29,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:36:29,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:36:29,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:36:28" (1/3) ... [2021-10-13 07:36:29,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36760cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:36:29, skipping insertion in model container [2021-10-13 07:36:29,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:28" (2/3) ... [2021-10-13 07:36:29,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36760cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:36:29, skipping insertion in model container [2021-10-13 07:36:29,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:36:29" (3/3) ... [2021-10-13 07:36:29,014 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2021-10-13 07:36:29,019 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:36:29,019 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:36:29,078 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:36:29,091 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 07:36:29,092 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:36:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 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 07:36:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:36:29,119 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:29,120 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:29,120 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:29,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:29,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1392646538, now seen corresponding path program 1 times [2021-10-13 07:36:29,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:36:29,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568410053] [2021-10-13 07:36:29,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:29,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:36:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:29,404 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 07:36:29,405 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:36:29,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568410053] [2021-10-13 07:36:29,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568410053] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:36:29,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:36:29,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:36:29,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790613214] [2021-10-13 07:36:29,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:36:29,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:36:29,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:36:29,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:36:29,435 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 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 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:36:29,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:29,491 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2021-10-13 07:36:29,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:36:29,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 07:36:29,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:29,503 INFO L225 Difference]: With dead ends: 24 [2021-10-13 07:36:29,504 INFO L226 Difference]: Without dead ends: 11 [2021-10-13 07:36:29,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:36:29,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-13 07:36:29,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-13 07:36:29,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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 07:36:29,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2021-10-13 07:36:29,537 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 9 [2021-10-13 07:36:29,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:29,538 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2021-10-13 07:36:29,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:36:29,539 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2021-10-13 07:36:29,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:36:29,540 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:29,540 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:29,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:36:29,541 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:29,544 INFO L82 PathProgramCache]: Analyzing trace with hash -13332003, now seen corresponding path program 1 times [2021-10-13 07:36:29,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:36:29,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018897685] [2021-10-13 07:36:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:29,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:36:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:29,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:36:29,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:36:29,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018897685] [2021-10-13 07:36:29,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018897685] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:36:29,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:36:29,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:36:29,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902765981] [2021-10-13 07:36:29,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:36:29,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:36:29,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:36:29,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:36:29,688 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 07:36:29,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:29,746 INFO L93 Difference]: Finished difference Result 20 states and 29 transitions. [2021-10-13 07:36:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:36:29,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-10-13 07:36:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:29,749 INFO L225 Difference]: With dead ends: 20 [2021-10-13 07:36:29,749 INFO L226 Difference]: Without dead ends: 14 [2021-10-13 07:36:29,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:36:29,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-13 07:36:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-13 07:36:29,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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 07:36:29,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2021-10-13 07:36:29,759 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 10 [2021-10-13 07:36:29,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:29,760 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2021-10-13 07:36:29,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 07:36:29,761 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2021-10-13 07:36:29,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:36:29,762 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:29,762 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:29,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:36:29,765 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:29,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1561250112, now seen corresponding path program 1 times [2021-10-13 07:36:29,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:36:29,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641001123] [2021-10-13 07:36:29,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:29,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:36:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:36:29,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:36:29,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641001123] [2021-10-13 07:36:29,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641001123] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:36:29,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:36:29,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:36:29,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441638567] [2021-10-13 07:36:29,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:36:29,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:36:29,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:36:29,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:36:29,904 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 07:36:29,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:29,963 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2021-10-13 07:36:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:36:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 13 [2021-10-13 07:36:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:29,964 INFO L225 Difference]: With dead ends: 20 [2021-10-13 07:36:29,964 INFO L226 Difference]: Without dead ends: 15 [2021-10-13 07:36:29,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:36:29,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-13 07:36:29,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-13 07:36:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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 07:36:29,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-10-13 07:36:29,969 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 13 [2021-10-13 07:36:29,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:29,969 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-10-13 07:36:29,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 07:36:29,970 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-10-13 07:36:29,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:36:29,970 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:29,970 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:29,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:36:29,971 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:29,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:29,971 INFO L82 PathProgramCache]: Analyzing trace with hash 592403004, now seen corresponding path program 1 times [2021-10-13 07:36:29,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:36:29,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565551411] [2021-10-13 07:36:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:29,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:36:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:36:30,043 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:36:30,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565551411] [2021-10-13 07:36:30,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565551411] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:36:30,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762757086] [2021-10-13 07:36:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:30,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:30,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:36:30,046 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:36:30,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:36:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:30,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:36:30,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:36:30,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:36:30,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762757086] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:30,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1653935648] [2021-10-13 07:36:30,389 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-13 07:36:30,389 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:36:30,393 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:36:30,399 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:36:30,399 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:36:30,433 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:36:30,440 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:36:30,441 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:36:30,442 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 07:36:30,443 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:36:30,443 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:36:30,444 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 07:36:30,447 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-10-13 07:36:30,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:36:30,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-13 07:36:30,495 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:36:30,496 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-13 07:36:30,496 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:36:30,497 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-13 07:36:30,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:36:30,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:36:30,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:36:30,537 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:36:30,540 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-13 07:36:30,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:36:30,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:94, output treesize:95 [2021-10-13 07:36:30,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-13 07:36:30,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:30,760 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_14| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:36:30,764 INFO L168 Benchmark]: Toolchain (without parser) took 2524.02 ms. Allocated memory was 96.5 MB in the beginning and 119.5 MB in the end (delta: 23.1 MB). Free memory was 63.4 MB in the beginning and 77.5 MB in the end (delta: -14.1 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:36:30,764 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 96.5 MB. Free memory is still 48.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:36:30,765 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.35 ms. Allocated memory is still 96.5 MB. Free memory was 63.2 MB in the beginning and 71.8 MB in the end (delta: -8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:36:30,765 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.15 ms. Allocated memory is still 96.5 MB. Free memory was 71.8 MB in the beginning and 69.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:36:30,766 INFO L168 Benchmark]: Boogie Preprocessor took 28.80 ms. Allocated memory is still 96.5 MB. Free memory was 69.7 MB in the beginning and 68.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:36:30,766 INFO L168 Benchmark]: RCFGBuilder took 442.32 ms. Allocated memory is still 96.5 MB. Free memory was 68.4 MB in the beginning and 52.3 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:36:30,767 INFO L168 Benchmark]: TraceAbstraction took 1754.80 ms. Allocated memory was 96.5 MB in the beginning and 119.5 MB in the end (delta: 23.1 MB). Free memory was 51.7 MB in the beginning and 77.5 MB in the end (delta: -25.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:36:30,773 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 96.5 MB. Free memory is still 48.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 254.35 ms. Allocated memory is still 96.5 MB. Free memory was 63.2 MB in the beginning and 71.8 MB in the end (delta: -8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.15 ms. Allocated memory is still 96.5 MB. Free memory was 71.8 MB in the beginning and 69.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.80 ms. Allocated memory is still 96.5 MB. Free memory was 69.7 MB in the beginning and 68.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 442.32 ms. Allocated memory is still 96.5 MB. Free memory was 68.4 MB in the beginning and 52.3 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1754.80 ms. Allocated memory was 96.5 MB in the beginning and 119.5 MB in the end (delta: 23.1 MB). Free memory was 51.7 MB in the beginning and 77.5 MB in the end (delta: -25.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_14| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_14|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:36:30,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/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 07:36:33,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:36:33,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:36:33,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:36:33,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:36:33,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:36:33,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:36:33,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:36:33,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:36:33,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:36:33,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:36:33,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:36:33,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:36:33,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:36:33,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:36:33,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:36:33,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:36:33,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:36:33,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:36:33,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:36:33,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:36:33,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:36:33,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:36:33,301 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:36:33,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:36:33,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:36:33,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:36:33,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:36:33,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:36:33,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:36:33,318 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:36:33,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:36:33,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:36:33,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:36:33,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:36:33,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:36:33,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:36:33,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:36:33,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:36:33,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:36:33,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:36:33,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:36:33,372 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:36:33,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:36:33,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:36:33,373 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:36:33,374 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:36:33,374 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:36:33,374 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:36:33,374 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:36:33,374 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:36:33,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:36:33,375 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:36:33,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:36:33,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:36:33,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:36:33,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:36:33,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:36:33,377 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:36:33,377 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:36:33,377 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:36:33,377 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:36:33,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:36:33,378 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:36:33,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:36:33,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:36:33,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:36:33,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:36:33,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:36:33,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:36:33,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:36:33,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:36:33,380 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:36:33,380 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:36:33,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:36:33,381 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:36:33,381 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:36:33,381 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_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a13961418fec0d16c53db1d204e2c00858b0a3a5 [2021-10-13 07:36:33,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:36:33,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:36:33,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:36:33,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:36:33,744 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:36:33,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-crafted/bAnd5.i [2021-10-13 07:36:33,830 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/data/2035a69e0/1040fb8ed30d4d74869ff67df354e6e4/FLAG12caaed07 [2021-10-13 07:36:34,331 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:36:34,334 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/sv-benchmarks/c/array-crafted/bAnd5.i [2021-10-13 07:36:34,343 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/data/2035a69e0/1040fb8ed30d4d74869ff67df354e6e4/FLAG12caaed07 [2021-10-13 07:36:34,696 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/data/2035a69e0/1040fb8ed30d4d74869ff67df354e6e4 [2021-10-13 07:36:34,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:36:34,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:36:34,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:36:34,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:36:34,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:36:34,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:36:34" (1/1) ... [2021-10-13 07:36:34,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6627d31e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:34, skipping insertion in model container [2021-10-13 07:36:34,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:36:34" (1/1) ... [2021-10-13 07:36:34,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:36:34,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:36:34,919 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_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-10-13 07:36:34,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:36:34,932 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:36:34,955 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_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-10-13 07:36:34,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:36:35,008 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:36:35,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:35 WrapperNode [2021-10-13 07:36:35,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:36:35,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:36:35,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:36:35,014 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:36:35,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:35" (1/1) ... [2021-10-13 07:36:35,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:35" (1/1) ... [2021-10-13 07:36:35,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:36:35,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:36:35,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:36:35,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:36:35,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:35" (1/1) ... [2021-10-13 07:36:35,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:35" (1/1) ... [2021-10-13 07:36:35,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:35" (1/1) ... [2021-10-13 07:36:35,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:35" (1/1) ... [2021-10-13 07:36:35,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:35" (1/1) ... [2021-10-13 07:36:35,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:35" (1/1) ... [2021-10-13 07:36:35,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:35" (1/1) ... [2021-10-13 07:36:35,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:36:35,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:36:35,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:36:35,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:36:35,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:35" (1/1) ... [2021-10-13 07:36:35,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:36:35,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:36:35,137 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:36:35,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:36:35,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:36:35,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:36:35,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:36:35,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:36:35,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:36:35,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:36:35,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:36:35,580 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:36:35,580 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 07:36:35,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:36:35 BoogieIcfgContainer [2021-10-13 07:36:35,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:36:35,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:36:35,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:36:35,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:36:35,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:36:34" (1/3) ... [2021-10-13 07:36:35,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@445c84ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:36:35, skipping insertion in model container [2021-10-13 07:36:35,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:35" (2/3) ... [2021-10-13 07:36:35,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@445c84ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:36:35, skipping insertion in model container [2021-10-13 07:36:35,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:36:35" (3/3) ... [2021-10-13 07:36:35,590 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2021-10-13 07:36:35,595 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:36:35,595 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:36:35,695 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:36:35,701 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 07:36:35,702 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:36:35,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 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 07:36:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:36:35,722 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:35,722 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:35,723 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:35,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:35,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1563818866, now seen corresponding path program 1 times [2021-10-13 07:36:35,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:36:35,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038290060] [2021-10-13 07:36:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:35,744 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:36:35,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:36:35,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:36:35,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:36:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:35,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:36:35,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:35,952 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 07:36:35,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:36,028 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 07:36:36,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:36:36,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038290060] [2021-10-13 07:36:36,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038290060] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:36:36,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:36:36,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:36:36,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454288261] [2021-10-13 07:36:36,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:36:36,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:36:36,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:36:36,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:36:36,058 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 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 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 07:36:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:36,080 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2021-10-13 07:36:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:36:36,082 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2021-10-13 07:36:36,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:36,090 INFO L225 Difference]: With dead ends: 53 [2021-10-13 07:36:36,090 INFO L226 Difference]: Without dead ends: 24 [2021-10-13 07:36:36,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:36:36,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-13 07:36:36,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-13 07:36:36,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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 07:36:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-10-13 07:36:36,129 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2021-10-13 07:36:36,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:36,130 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-10-13 07:36:36,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 07:36:36,131 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-10-13 07:36:36,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:36:36,133 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:36,133 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:36,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:36,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:36:36,345 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:36,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:36,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2019195128, now seen corresponding path program 1 times [2021-10-13 07:36:36,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:36:36,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289634009] [2021-10-13 07:36:36,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:36,348 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:36:36,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:36:36,349 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:36:36,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:36:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:36,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:36:36,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:36,546 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 07:36:36,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:36,617 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 07:36:36,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:36:36,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289634009] [2021-10-13 07:36:36,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289634009] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:36:36,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:36:36,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:36:36,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822796911] [2021-10-13 07:36:36,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:36:36,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:36:36,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:36:36,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:36:36,621 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 07:36:36,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:36,688 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-10-13 07:36:36,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:36:36,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 18 [2021-10-13 07:36:36,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:36,690 INFO L225 Difference]: With dead ends: 46 [2021-10-13 07:36:36,690 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 07:36:36,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:36:36,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 07:36:36,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-13 07:36:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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 07:36:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-10-13 07:36:36,697 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2021-10-13 07:36:36,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:36,697 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-13 07:36:36,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 07:36:36,698 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-10-13 07:36:36,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 07:36:36,699 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:36,699 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:36,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:36,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:36:36,910 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:36,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:36,911 INFO L82 PathProgramCache]: Analyzing trace with hash -524663612, now seen corresponding path program 1 times [2021-10-13 07:36:36,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:36:36,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615633705] [2021-10-13 07:36:36,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:36,913 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:36:36,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:36:36,914 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:36:36,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:36:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:37,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:36:37,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:37,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:37,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:36:37,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615633705] [2021-10-13 07:36:37,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615633705] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:37,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1366563807] [2021-10-13 07:36:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:37,553 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:36:37,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:36:37,563 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:36:37,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 07:36:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:37,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:36:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:37,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:38,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1366563807] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:38,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121959489] [2021-10-13 07:36:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:38,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:38,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:36:38,014 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:36:38,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:36:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:38,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:36:38,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:36:38,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:36:38,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121959489] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:36:38,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:36:38,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7, 7, 7] total 13 [2021-10-13 07:36:38,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678051781] [2021-10-13 07:36:38,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:36:38,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:36:38,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:36:38,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:36:38,332 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 07:36:38,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:38,468 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2021-10-13 07:36:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:36:38,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 22 [2021-10-13 07:36:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:38,471 INFO L225 Difference]: With dead ends: 49 [2021-10-13 07:36:38,471 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 07:36:38,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:36:38,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 07:36:38,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-10-13 07:36:38,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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 07:36:38,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-10-13 07:36:38,477 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-10-13 07:36:38,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:38,477 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-10-13 07:36:38,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 07:36:38,478 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-10-13 07:36:38,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 07:36:38,478 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:38,478 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:38,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:38,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:38,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 07:36:39,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:36:39,080 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:39,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:39,080 INFO L82 PathProgramCache]: Analyzing trace with hash -187943454, now seen corresponding path program 1 times [2021-10-13 07:36:39,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:36:39,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020514237] [2021-10-13 07:36:39,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:39,081 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:36:39,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:36:39,082 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:36:39,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:36:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:39,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:36:39,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:36:39,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:36:39,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:36:39,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020514237] [2021-10-13 07:36:39,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020514237] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:39,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1448216477] [2021-10-13 07:36:39,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:39,823 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:36:39,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:36:39,824 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:36:39,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 07:36:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:40,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:36:40,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:36:40,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:36:40,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1448216477] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:40,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324317763] [2021-10-13 07:36:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:40,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:40,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:36:40,426 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:36:40,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 07:36:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:40,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:36:40,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 07:36:40,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 07:36:41,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324317763] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:41,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:36:41,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 6] total 17 [2021-10-13 07:36:41,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861813721] [2021-10-13 07:36:41,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 07:36:41,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:36:41,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 07:36:41,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-10-13 07:36:41,064 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 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 07:36:41,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:41,758 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2021-10-13 07:36:41,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 07:36:41,759 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 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 28 [2021-10-13 07:36:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:41,760 INFO L225 Difference]: With dead ends: 107 [2021-10-13 07:36:41,760 INFO L226 Difference]: Without dead ends: 87 [2021-10-13 07:36:41,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 549.0ms TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-10-13 07:36:41,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-13 07:36:41,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2021-10-13 07:36:41,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 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 07:36:41,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-10-13 07:36:41,773 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 28 [2021-10-13 07:36:41,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:41,773 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-10-13 07:36:41,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 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 07:36:41,774 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-10-13 07:36:41,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 07:36:41,775 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:41,775 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:41,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:41,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:42,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:42,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:42,378 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:42,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:42,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1519457344, now seen corresponding path program 1 times [2021-10-13 07:36:42,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:36:42,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648728293] [2021-10-13 07:36:42,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:42,380 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:36:42,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:36:42,381 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:36:42,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:36:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:42,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-13 07:36:42,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:43,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:36:43,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-10-13 07:36:43,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:36:43,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:36:43,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-10-13 07:36:43,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:36:43,825 INFO L354 Elim1Store]: treesize reduction 68, result has 9.3 percent of original size [2021-10-13 07:36:43,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-10-13 07:36:43,984 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-10-13 07:36:43,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 34 [2021-10-13 07:36:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:44,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:55,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 111 [2021-10-13 07:36:55,556 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 07:36:55,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 156 [2021-10-13 07:36:55,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-10-13 07:36:55,602 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 07:36:55,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2021-10-13 07:36:56,388 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:36:56,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648728293] [2021-10-13 07:36:56,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-13 07:36:56,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [215150231] [2021-10-13 07:36:56,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:56,390 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:36:56,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:36:56,394 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:36:56,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 07:36:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:56,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-13 07:36:56,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:56,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 07:36:57,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:36:57,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-10-13 07:36:57,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:36:57,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:36:57,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-10-13 07:36:57,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:36:57,632 INFO L354 Elim1Store]: treesize reduction 68, result has 9.3 percent of original size [2021-10-13 07:36:57,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-10-13 07:36:57,694 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-10-13 07:36:57,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 34 [2021-10-13 07:36:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:58,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:07,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 223 [2021-10-13 07:37:07,964 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 07:37:07,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 755 treesize of output 623 [2021-10-13 07:37:09,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-13 07:37:09,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190109411] [2021-10-13 07:37:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:37:09,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:37:09,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:37:09,082 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:37:09,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 07:37:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:37:10,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-13 07:37:10,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:37:10,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:37:10,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-10-13 07:37:11,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:37:11,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:37:11,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-10-13 07:37:11,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:37:11,382 INFO L354 Elim1Store]: treesize reduction 68, result has 9.3 percent of original size [2021-10-13 07:37:11,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-10-13 07:37:11,437 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-10-13 07:37:11,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 34 [2021-10-13 07:37:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:37:11,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:17,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 111 [2021-10-13 07:37:17,274 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 07:37:17,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 156 [2021-10-13 07:37:17,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-10-13 07:37:17,320 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 07:37:17,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2021-10-13 07:37:17,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-13 07:37:17,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:37:17,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 07:37:17,531 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 07:37:17,531 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 07:37:17,538 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:37:17,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:17,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:17,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-10-13 07:37:18,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb518ed5-ba61-4c5e-8438-0deef3d7cdcc/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:37:18,157 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:37:18,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:37:18 BoogieIcfgContainer [2021-10-13 07:37:18,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:37:18,176 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:37:18,176 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:37:18,177 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:37:18,177 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:36:35" (3/4) ... [2021-10-13 07:37:18,180 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:37:18,180 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:37:18,181 INFO L168 Benchmark]: Toolchain (without parser) took 43481.42 ms. Allocated memory was 79.7 MB in the beginning and 102.8 MB in the end (delta: 23.1 MB). Free memory was 45.3 MB in the beginning and 40.2 MB in the end (delta: 5.1 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:18,182 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 79.7 MB. Free memory was 61.7 MB in the beginning and 61.7 MB in the end (delta: 69.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:37:18,183 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.77 ms. Allocated memory is still 79.7 MB. Free memory was 45.1 MB in the beginning and 64.1 MB in the end (delta: -19.0 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:18,183 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.28 ms. Allocated memory is still 79.7 MB. Free memory was 64.1 MB in the beginning and 62.2 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:37:18,183 INFO L168 Benchmark]: Boogie Preprocessor took 38.79 ms. Allocated memory is still 79.7 MB. Free memory was 62.2 MB in the beginning and 60.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:37:18,184 INFO L168 Benchmark]: RCFGBuilder took 489.61 ms. Allocated memory is still 79.7 MB. Free memory was 60.8 MB in the beginning and 48.3 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:18,184 INFO L168 Benchmark]: TraceAbstraction took 42592.06 ms. Allocated memory was 79.7 MB in the beginning and 102.8 MB in the end (delta: 23.1 MB). Free memory was 47.7 MB in the beginning and 40.2 MB in the end (delta: 7.5 MB). Peak memory consumption was 32.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:18,185 INFO L168 Benchmark]: Witness Printer took 4.31 ms. Allocated memory is still 102.8 MB. Free memory is still 40.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:37:18,187 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 79.7 MB. Free memory was 61.7 MB in the beginning and 61.7 MB in the end (delta: 69.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 307.77 ms. Allocated memory is still 79.7 MB. Free memory was 45.1 MB in the beginning and 64.1 MB in the end (delta: -19.0 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.28 ms. Allocated memory is still 79.7 MB. Free memory was 64.1 MB in the beginning and 62.2 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.79 ms. Allocated memory is still 79.7 MB. Free memory was 62.2 MB in the beginning and 60.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 489.61 ms. Allocated memory is still 79.7 MB. Free memory was 60.8 MB in the beginning and 48.3 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 42592.06 ms. Allocated memory was 79.7 MB in the beginning and 102.8 MB in the end (delta: 23.1 MB). Free memory was 47.7 MB in the beginning and 40.2 MB in the end (delta: 7.5 MB). Peak memory consumption was 32.0 MB. Max. memory is 16.1 GB. * Witness Printer took 4.31 ms. Allocated memory is still 102.8 MB. Free memory is still 40.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms 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: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ [L40] COND FALSE !(i < N) [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res & x[i] [L24] i++ [L24] COND FALSE !(i < N) [L27] return res; [L45] ret = bAnd(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res & x[i] [L24] i++ [L24] COND FALSE !(i < N) [L27] return res; [L48] ret2 = bAnd(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; [L50] COND TRUE i