./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI --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 69b832f739d4cb406c75348d752f2b481146132b .................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:23:12,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:23:12,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:23:12,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:23:12,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:23:12,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:23:12,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:23:12,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:23:12,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:23:12,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:23:12,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:23:12,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:23:12,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:23:12,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:23:12,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:23:12,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:23:12,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:23:12,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:23:13,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:23:13,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:23:13,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:23:13,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:23:13,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:23:13,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:23:13,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:23:13,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:23:13,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:23:13,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:23:13,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:23:13,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:23:13,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:23:13,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:23:13,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:23:13,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:23:13,035 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:23:13,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:23:13,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:23:13,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:23:13,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:23:13,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:23:13,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:23:13,042 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:23:13,087 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:23:13,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:23:13,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:23:13,090 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:23:13,090 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:23:13,090 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:23:13,090 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:23:13,091 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:23:13,097 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:23:13,097 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:23:13,098 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:23:13,099 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:23:13,099 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:23:13,099 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:23:13,099 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:23:13,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:23:13,100 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:23:13,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:23:13,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:23:13,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:23:13,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:23:13,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:23:13,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:23:13,102 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:23:13,102 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:23:13,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:23:13,103 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:23:13,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:23:13,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:23:13,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:23:13,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:13,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:23:13,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:23:13,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:23:13,106 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:23:13,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:23:13,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:23:13,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:23:13,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:23:13,107 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_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69b832f739d4cb406c75348d752f2b481146132b [2021-10-11 02:23:13,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:23:13,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:23:13,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:23:13,491 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:23:13,492 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:23:13,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2021-10-11 02:23:13,579 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI/data/afe149a64/3547642aa7ab4a3983926b6b3cdbc034/FLAGbe3c87633 [2021-10-11 02:23:14,056 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:23:14,057 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2021-10-11 02:23:14,070 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI/data/afe149a64/3547642aa7ab4a3983926b6b3cdbc034/FLAGbe3c87633 [2021-10-11 02:23:14,412 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI/data/afe149a64/3547642aa7ab4a3983926b6b3cdbc034 [2021-10-11 02:23:14,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:23:14,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:23:14,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:14,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:23:14,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:23:14,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:14" (1/1) ... [2021-10-11 02:23:14,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e2d6e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:14, skipping insertion in model container [2021-10-11 02:23:14,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:14" (1/1) ... [2021-10-11 02:23:14,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:23:14,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:23:14,662 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c[524,537] [2021-10-11 02:23:14,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:14,689 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:23:14,700 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c[524,537] [2021-10-11 02:23:14,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:14,723 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:23:14,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:14 WrapperNode [2021-10-11 02:23:14,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:14,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:14,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:23:14,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:23:14,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:14" (1/1) ... [2021-10-11 02:23:14,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:14" (1/1) ... [2021-10-11 02:23:14,782 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:14,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:23:14,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:23:14,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:23:14,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:14" (1/1) ... [2021-10-11 02:23:14,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:14" (1/1) ... [2021-10-11 02:23:14,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:14" (1/1) ... [2021-10-11 02:23:14,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:14" (1/1) ... [2021-10-11 02:23:14,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:14" (1/1) ... [2021-10-11 02:23:14,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:14" (1/1) ... [2021-10-11 02:23:14,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:14" (1/1) ... [2021-10-11 02:23:14,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:23:14,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:23:14,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:23:14,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:23:14,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:14" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:14,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:23:14,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:23:14,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:23:14,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:23:15,498 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:23:15,499 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-11 02:23:15,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:15 BoogieIcfgContainer [2021-10-11 02:23:15,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:23:15,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:23:15,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:23:15,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:23:15,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:23:14" (1/3) ... [2021-10-11 02:23:15,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ef84d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:15, skipping insertion in model container [2021-10-11 02:23:15,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:14" (2/3) ... [2021-10-11 02:23:15,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ef84d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:15, skipping insertion in model container [2021-10-11 02:23:15,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:15" (3/3) ... [2021-10-11 02:23:15,516 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound20.c [2021-10-11 02:23:15,535 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:23:15,539 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-10-11 02:23:15,549 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-11 02:23:15,570 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:23:15,570 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:23:15,570 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:23:15,570 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:23:15,570 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:23:15,570 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:23:15,571 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:23:15,571 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:23:15,584 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-10-11 02:23:15,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:23:15,589 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:15,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:23:15,590 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:15,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:15,597 INFO L82 PathProgramCache]: Analyzing trace with hash 114272414, now seen corresponding path program 1 times [2021-10-11 02:23:15,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:15,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333962577] [2021-10-11 02:23:15,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:15,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333962577] [2021-10-11 02:23:15,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:15,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:23:15,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921623037] [2021-10-11 02:23:15,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:23:15,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:15,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:23:15,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:23:15,782 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2021-10-11 02:23:15,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:15,798 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-10-11 02:23:15,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:23:15,800 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2021-10-11 02:23:15,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:15,821 INFO L225 Difference]: With dead ends: 33 [2021-10-11 02:23:15,824 INFO L226 Difference]: Without dead ends: 15 [2021-10-11 02:23:15,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:23:15,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-11 02:23:15,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-11 02:23:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-11 02:23:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-11 02:23:15,863 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2021-10-11 02:23:15,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:15,864 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-11 02:23:15,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:23:15,864 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-11 02:23:15,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:23:15,865 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:15,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:23:15,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:23:15,866 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:15,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:15,870 INFO L82 PathProgramCache]: Analyzing trace with hash 113105601, now seen corresponding path program 1 times [2021-10-11 02:23:15,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:15,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530912660] [2021-10-11 02:23:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:15,911 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:23:15,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207385992] [2021-10-11 02:23:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:15,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-11 02:23:15,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:16,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:16,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530912660] [2021-10-11 02:23:16,145 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:16,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207385992] [2021-10-11 02:23:16,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:16,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-11 02:23:16,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051586024] [2021-10-11 02:23:16,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:23:16,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:16,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:23:16,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:23:16,153 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2021-10-11 02:23:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:18,365 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-10-11 02:23:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 02:23:18,366 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2021-10-11 02:23:18,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:18,367 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:23:18,368 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 02:23:18,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:23:18,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 02:23:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 22. [2021-10-11 02:23:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:23:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-10-11 02:23:18,376 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 5 [2021-10-11 02:23:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:18,377 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-10-11 02:23:18,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:23:18,377 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-10-11 02:23:18,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:23:18,378 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:18,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:23:18,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 02:23:18,606 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:18,606 INFO L82 PathProgramCache]: Analyzing trace with hash -788721413, now seen corresponding path program 1 times [2021-10-11 02:23:18,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:18,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881532194] [2021-10-11 02:23:18,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:18,620 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:23:18,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770425616] [2021-10-11 02:23:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:18,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:23:18,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:18,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:18,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881532194] [2021-10-11 02:23:18,726 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:18,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770425616] [2021-10-11 02:23:18,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:18,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-11 02:23:18,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056950820] [2021-10-11 02:23:18,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:23:18,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:18,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:23:18,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:23:18,731 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2021-10-11 02:23:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:18,777 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-10-11 02:23:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:23:18,777 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2021-10-11 02:23:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:18,779 INFO L225 Difference]: With dead ends: 38 [2021-10-11 02:23:18,779 INFO L226 Difference]: Without dead ends: 30 [2021-10-11 02:23:18,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:23:18,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-11 02:23:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-10-11 02:23:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:23:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-10-11 02:23:18,794 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 6 [2021-10-11 02:23:18,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:18,794 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-11 02:23:18,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:23:18,794 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-10-11 02:23:18,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:23:18,796 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:18,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:18,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:18,999 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:18,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:19,000 INFO L82 PathProgramCache]: Analyzing trace with hash -2015458316, now seen corresponding path program 1 times [2021-10-11 02:23:19,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:19,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379053301] [2021-10-11 02:23:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:19,012 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:23:19,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211538461] [2021-10-11 02:23:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:19,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-11 02:23:19,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:19,272 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:23:19,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:23:19,293 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:23:19,298 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:23:19,301 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:23:19,303 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:23:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:19,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:19,457 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2021-10-11 02:23:19,458 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:23:19,464 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:23:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:19,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379053301] [2021-10-11 02:23:19,476 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:19,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211538461] [2021-10-11 02:23:19,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:19,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-10-11 02:23:19,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720758128] [2021-10-11 02:23:19,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 02:23:19,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:19,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 02:23:19,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:23:19,478 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2021-10-11 02:23:19,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:19,480 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-10-11 02:23:19,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:23:19,480 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 8 [2021-10-11 02:23:19,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:19,481 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:23:19,481 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:23:19,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:23:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:23:19,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:23:19,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:23:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:23:19,482 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2021-10-11 02:23:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:19,483 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:23:19,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 02:23:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:23:19,483 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:23:19,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:19,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:23:19,725 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-11 02:23:19,725 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:23:19,725 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-11 02:23:19,725 INFO L262 CegarLoopResult]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-10-11 02:23:19,725 INFO L258 CegarLoopResult]: At program point L12-2(lines 36 37) the Hoare annotation is: false [2021-10-11 02:23:19,725 INFO L262 CegarLoopResult]: For program point L12-3(lines 12 15) no Hoare annotation was computed. [2021-10-11 02:23:19,726 INFO L258 CegarLoopResult]: At program point L12-5(lines 11 17) the Hoare annotation is: false [2021-10-11 02:23:19,726 INFO L262 CegarLoopResult]: For program point L12-6(lines 12 15) no Hoare annotation was computed. [2021-10-11 02:23:19,726 INFO L265 CegarLoopResult]: At program point L12-8(lines 11 17) the Hoare annotation is: true [2021-10-11 02:23:19,726 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:23:19,726 INFO L262 CegarLoopResult]: For program point L33-1(lines 33 54) no Hoare annotation was computed. [2021-10-11 02:23:19,726 INFO L262 CegarLoopResult]: For program point L33-3(lines 33 54) no Hoare annotation was computed. [2021-10-11 02:23:19,726 INFO L262 CegarLoopResult]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-10-11 02:23:19,726 INFO L258 CegarLoopResult]: At program point L46-2(lines 33 54) the Hoare annotation is: false [2021-10-11 02:23:19,726 INFO L262 CegarLoopResult]: For program point L13-1(lines 13 14) no Hoare annotation was computed. [2021-10-11 02:23:19,727 INFO L262 CegarLoopResult]: For program point L13-2(lines 13 14) no Hoare annotation was computed. [2021-10-11 02:23:19,727 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-11 02:23:19,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:23:19 BoogieIcfgContainer [2021-10-11 02:23:19,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:23:19,736 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:23:19,736 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:23:19,736 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:23:19,736 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:15" (3/4) ... [2021-10-11 02:23:19,739 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:23:19,752 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-11 02:23:19,753 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-11 02:23:19,753 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:23:19,753 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:23:19,823 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c993d229-016d-4197-9880-260e788086b6/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:23:19,827 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:23:19,829 INFO L168 Benchmark]: Toolchain (without parser) took 5412.66 ms. Allocated memory is still 134.2 MB. Free memory was 100.9 MB in the beginning and 107.2 MB in the end (delta: -6.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:19,830 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 79.7 MB. Free memory was 53.9 MB in the beginning and 53.9 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:19,831 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.59 ms. Allocated memory is still 134.2 MB. Free memory was 100.6 MB in the beginning and 111.2 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:19,831 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.46 ms. Allocated memory is still 134.2 MB. Free memory was 111.2 MB in the beginning and 109.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:19,832 INFO L168 Benchmark]: Boogie Preprocessor took 23.77 ms. Allocated memory is still 134.2 MB. Free memory was 109.6 MB in the beginning and 108.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:19,838 INFO L168 Benchmark]: RCFGBuilder took 693.43 ms. Allocated memory is still 134.2 MB. Free memory was 108.4 MB in the beginning and 82.5 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:19,839 INFO L168 Benchmark]: TraceAbstraction took 4232.45 ms. Allocated memory is still 134.2 MB. Free memory was 82.5 MB in the beginning and 110.3 MB in the end (delta: -27.8 MB). Peak memory consumption was 42.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:19,839 INFO L168 Benchmark]: Witness Printer took 91.77 ms. Allocated memory is still 134.2 MB. Free memory was 109.2 MB in the beginning and 107.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:19,841 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 79.7 MB. Free memory was 53.9 MB in the beginning and 53.9 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 294.59 ms. Allocated memory is still 134.2 MB. Free memory was 100.6 MB in the beginning and 111.2 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.46 ms. Allocated memory is still 134.2 MB. Free memory was 111.2 MB in the beginning and 109.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.77 ms. Allocated memory is still 134.2 MB. Free memory was 109.6 MB in the beginning and 108.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 693.43 ms. Allocated memory is still 134.2 MB. Free memory was 108.4 MB in the beginning and 82.5 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4232.45 ms. Allocated memory is still 134.2 MB. Free memory was 82.5 MB in the beginning and 110.3 MB in the end (delta: -27.8 MB). Peak memory consumption was 42.9 MB. Max. memory is 16.1 GB. * Witness Printer took 91.77 ms. Allocated memory is still 134.2 MB. Free memory was 109.2 MB in the beginning and 107.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 44 SDtfs, 48 SDslu, 76 SDs, 0 SdLazy, 42 SolverSat, 16 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 29 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 5 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1344 SizeOfPredicates, 24 NumberOfNonLiveVariables, 192 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...