./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/filter_iir.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter_iir.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH --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 8140822ac5d36d3dbe917657ea1276e86420f348faa7d4310d2cd40fc22f39e9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:51:31,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:51:31,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:51:31,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:51:31,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:51:31,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:51:31,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:51:31,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:51:31,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:51:31,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:51:31,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:51:31,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:51:31,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:51:31,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:51:31,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:51:31,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:51:31,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:51:31,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:51:31,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:51:31,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:51:31,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:51:31,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:51:31,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:51:31,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:51:31,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:51:31,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:51:31,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:51:31,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:51:31,959 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:51:31,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:51:31,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:51:31,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:51:31,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:51:31,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:51:31,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:51:31,965 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:51:31,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:51:31,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:51:31,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:51:31,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:51:31,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:51:31,970 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:51:32,009 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:51:32,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:51:32,019 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:51:32,021 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:51:32,021 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:51:32,021 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:51:32,021 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:51:32,021 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:51:32,022 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:51:32,022 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:51:32,026 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:51:32,026 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:51:32,026 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:51:32,027 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:51:32,027 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:51:32,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:51:32,028 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:51:32,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:51:32,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:51:32,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:51:32,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:51:32,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:51:32,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:51:32,029 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:51:32,029 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:51:32,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:51:32,030 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:51:32,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:51:32,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:51:32,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:51:32,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:51:32,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:51:32,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:51:32,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:51:32,031 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:51:32,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:51:32,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:51:32,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:51:32,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:51:32,032 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_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8140822ac5d36d3dbe917657ea1276e86420f348faa7d4310d2cd40fc22f39e9 [2021-11-03 03:51:32,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:51:32,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:51:32,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:51:32,372 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:51:32,373 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:51:32,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/float-benchs/filter_iir.c [2021-11-03 03:51:32,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/data/f81e9fe2e/936c233834ab4b8eab8b9118a6891a9b/FLAG777f77067 [2021-11-03 03:51:32,899 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:51:32,900 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/sv-benchmarks/c/float-benchs/filter_iir.c [2021-11-03 03:51:32,907 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/data/f81e9fe2e/936c233834ab4b8eab8b9118a6891a9b/FLAG777f77067 [2021-11-03 03:51:33,284 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/data/f81e9fe2e/936c233834ab4b8eab8b9118a6891a9b [2021-11-03 03:51:33,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:51:33,288 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:51:33,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:51:33,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:51:33,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:51:33,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:51:33" (1/1) ... [2021-11-03 03:51:33,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3acf050f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:33, skipping insertion in model container [2021-11-03 03:51:33,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:51:33" (1/1) ... [2021-11-03 03:51:33,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:51:33,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:51:33,488 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_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2021-11-03 03:51:33,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:51:33,551 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:51:33,573 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_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2021-11-03 03:51:33,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:51:33,636 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:51:33,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:33 WrapperNode [2021-11-03 03:51:33,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:51:33,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:51:33,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:51:33,640 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:51:33,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:33" (1/1) ... [2021-11-03 03:51:33,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:33" (1/1) ... [2021-11-03 03:51:33,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:51:33,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:51:33,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:51:33,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:51:33,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:33" (1/1) ... [2021-11-03 03:51:33,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:33" (1/1) ... [2021-11-03 03:51:33,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:33" (1/1) ... [2021-11-03 03:51:33,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:33" (1/1) ... [2021-11-03 03:51:33,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:33" (1/1) ... [2021-11-03 03:51:33,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:33" (1/1) ... [2021-11-03 03:51:33,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:33" (1/1) ... [2021-11-03 03:51:33,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:51:33,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:51:33,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:51:33,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:51:33,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:33" (1/1) ... [2021-11-03 03:51:33,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:51:33,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:51:33,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:51:33,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:51:33,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 03:51:33,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:51:33,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-03 03:51:33,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-03 03:51:33,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:51:33,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:51:33,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2021-11-03 03:51:34,554 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:51:34,554 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-03 03:51:34,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:34 BoogieIcfgContainer [2021-11-03 03:51:34,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:51:34,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:51:34,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:51:34,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:51:34,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:51:33" (1/3) ... [2021-11-03 03:51:34,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ea3775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:34, skipping insertion in model container [2021-11-03 03:51:34,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:33" (2/3) ... [2021-11-03 03:51:34,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ea3775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:34, skipping insertion in model container [2021-11-03 03:51:34,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:34" (3/3) ... [2021-11-03 03:51:34,565 INFO L111 eAbstractionObserver]: Analyzing ICFG filter_iir.c [2021-11-03 03:51:34,570 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:51:34,570 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 03:51:34,642 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:51:34,648 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 03:51:34,648 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 03:51:34,663 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:34,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-03 03:51:34,668 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:34,680 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-03 03:51:34,681 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:51:34,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:34,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2597808, now seen corresponding path program 1 times [2021-11-03 03:51:34,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:51:34,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117656204] [2021-11-03 03:51:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:34,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:51:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 03:51:34,926 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-03 03:51:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 03:51:35,211 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-03 03:51:35,213 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-03 03:51:35,214 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 03:51:35,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 03:51:35,221 INFO L731 BasicCegarLoop]: Path program histogram: [1] [2021-11-03 03:51:35,224 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 03:51:35,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:51:35 BoogieIcfgContainer [2021-11-03 03:51:35,283 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 03:51:35,290 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 03:51:35,291 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 03:51:35,291 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 03:51:35,292 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:34" (3/4) ... [2021-11-03 03:51:35,295 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-03 03:51:35,296 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 03:51:35,299 INFO L168 Benchmark]: Toolchain (without parser) took 2009.30 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 52.0 MB in the beginning and 59.8 MB in the end (delta: -7.7 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. [2021-11-03 03:51:35,300 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory is still 68.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:51:35,302 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.29 ms. Allocated memory is still 94.4 MB. Free memory was 51.8 MB in the beginning and 67.3 MB in the end (delta: -15.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-03 03:51:35,303 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.70 ms. Allocated memory is still 94.4 MB. Free memory was 67.3 MB in the beginning and 65.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 03:51:35,305 INFO L168 Benchmark]: Boogie Preprocessor took 55.76 ms. Allocated memory is still 94.4 MB. Free memory was 65.2 MB in the beginning and 63.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 03:51:35,306 INFO L168 Benchmark]: RCFGBuilder took 797.50 ms. Allocated memory is still 94.4 MB. Free memory was 63.5 MB in the beginning and 35.9 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-11-03 03:51:35,314 INFO L168 Benchmark]: TraceAbstraction took 724.42 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 35.4 MB in the beginning and 60.4 MB in the end (delta: -24.9 MB). Peak memory consumption was 2.5 MB. Max. memory is 16.1 GB. [2021-11-03 03:51:35,314 INFO L168 Benchmark]: Witness Printer took 6.46 ms. Allocated memory is still 119.5 MB. Free memory was 60.4 MB in the beginning and 59.8 MB in the end (delta: 604.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:51:35,323 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory is still 68.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 347.29 ms. Allocated memory is still 94.4 MB. Free memory was 51.8 MB in the beginning and 67.3 MB in the end (delta: -15.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.70 ms. Allocated memory is still 94.4 MB. Free memory was 67.3 MB in the beginning and 65.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.76 ms. Allocated memory is still 94.4 MB. Free memory was 65.2 MB in the beginning and 63.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 797.50 ms. Allocated memory is still 94.4 MB. Free memory was 63.5 MB in the beginning and 35.9 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 724.42 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 35.4 MB in the beginning and 60.4 MB in the end (delta: -24.9 MB). Peak memory consumption was 2.5 MB. Max. memory is 16.1 GB. * Witness Printer took 6.46 ms. Allocated memory is still 119.5 MB. Free memory was 60.4 MB in the beginning and 59.8 MB in the end (delta: 604.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 50, overapproximation of to_real at line 16, overapproximation of someBinaryArithmeticDOUBLEoperation at line 28. Possible FailurePath: [L16] double A1[3] = { 1, 0.5179422053046, 1.0 }; [L17] double b1[2] = { 1.470767736573, 0.5522073405779 }; [L18] double A2[3] = { 1, 1.633101801841, 1.0 }; [L19] double b2[2] = { 1.742319554830, 0.820939679242 }; [L21] double D1[2], D2[2]; [L22] double P, X; [L43] D1[0] = 0. [L43] D1[1] = 0. [L44] D2[0] = 0. [L44] D2[1] = 0. [L45] P = 0. VAL [A1={11:0}, A2={9:0}, b1={3:0}, b2={7:0}, D1={17:0}, D2={5:0}, P={10:0}, X={15:0}] [L47] COND TRUE 1 [L49] X = __VERIFIER_nondet_double() [L50] EXPR \read(X) [L50] X >= -10. && X <= 10. [L50] EXPR \read(X) [L50] X >= -10. && X <= 10. [L11] COND FALSE !(!cond) [L26] double x1, y1, t1, t2; [L28] EXPR \read(*x) [L28] x1 = 0.0117749388721091 * *x [L30] EXPR b1[0] [L30] EXPR D1[0] [L30] EXPR b1[1] [L30] EXPR D1[1] [L30] t1 = x1 + b1[0]*D1[0] - b1[1]*D1[1] [L31] EXPR A1[0] [L31] EXPR A1[1] [L31] EXPR D1[0] [L31] EXPR A1[2] [L31] EXPR D1[1] [L31] y1 = A1[0]*t1 - A1[1]*D1[0] + A1[2]*D1[1] [L32] EXPR D1[0] [L32] D1[1] = D1[0] [L33] D1[0] = t1 [L35] EXPR b2[0] [L35] EXPR D2[0] [L35] EXPR b2[1] [L35] EXPR D2[1] [L35] t2 = y1 + b2[0]*D2[0] - b2[1]*D2[1] [L36] EXPR A2[0] [L36] EXPR A2[1] [L36] EXPR D2[0] [L36] EXPR A2[2] [L36] EXPR D2[1] [L36] *y = A2[0]*t2 - A2[1]*D2[0] + A2[2]*D2[1] [L37] EXPR D2[0] [L37] D2[1] = D2[0] [L38] D2[0] = t2 [L54] EXPR \read(P) [L54] P >= -1e30 && P <= 1e30 [L54] EXPR \read(P) [L54] P >= -1e30 && P <= 1e30 [L13] COND TRUE !(cond) VAL [A1={11:0}, A2={9:0}, b1={3:0}, b2={7:0}, D1={17:0}, D2={5:0}, P={10:0}, X={15:0}] [L13] reach_error() VAL [A1={11:0}, A2={9:0}, b1={3:0}, b2={7:0}, D1={17:0}, D2={5:0}, P={10:0}, X={15:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-03 03:51:35,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter_iir.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH --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 8140822ac5d36d3dbe917657ea1276e86420f348faa7d4310d2cd40fc22f39e9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:51:37,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:51:37,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:51:38,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:51:38,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:51:38,029 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:51:38,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:51:38,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:51:38,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:51:38,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:51:38,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:51:38,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:51:38,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:51:38,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:51:38,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:51:38,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:51:38,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:51:38,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:51:38,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:51:38,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:51:38,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:51:38,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:51:38,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:51:38,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:51:38,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:51:38,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:51:38,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:51:38,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:51:38,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:51:38,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:51:38,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:51:38,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:51:38,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:51:38,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:51:38,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:51:38,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:51:38,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:51:38,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:51:38,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:51:38,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:51:38,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:51:38,109 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 03:51:38,155 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:51:38,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:51:38,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:51:38,157 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:51:38,157 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:51:38,157 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:51:38,158 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:51:38,158 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:51:38,158 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:51:38,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:51:38,161 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:51:38,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:51:38,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:51:38,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:51:38,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:51:38,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:51:38,162 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:51:38,162 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 03:51:38,162 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 03:51:38,162 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:51:38,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:51:38,163 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:51:38,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:51:38,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:51:38,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 03:51:38,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:51:38,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:51:38,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:51:38,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:51:38,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:51:38,165 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 03:51:38,165 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 03:51:38,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:51:38,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:51:38,166 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:51:38,166 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_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8140822ac5d36d3dbe917657ea1276e86420f348faa7d4310d2cd40fc22f39e9 [2021-11-03 03:51:38,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:51:38,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:51:38,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:51:38,618 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:51:38,619 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:51:38,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/float-benchs/filter_iir.c [2021-11-03 03:51:38,699 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/data/5ffe0652b/d2c126b3452d4291b1d9fe21424a1af3/FLAG4ac612c2f [2021-11-03 03:51:39,249 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:51:39,252 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/sv-benchmarks/c/float-benchs/filter_iir.c [2021-11-03 03:51:39,261 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/data/5ffe0652b/d2c126b3452d4291b1d9fe21424a1af3/FLAG4ac612c2f [2021-11-03 03:51:39,592 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/data/5ffe0652b/d2c126b3452d4291b1d9fe21424a1af3 [2021-11-03 03:51:39,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:51:39,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:51:39,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:51:39,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:51:39,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:51:39,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:51:39" (1/1) ... [2021-11-03 03:51:39,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3339b462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:39, skipping insertion in model container [2021-11-03 03:51:39,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:51:39" (1/1) ... [2021-11-03 03:51:39,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:51:39,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:51:39,766 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_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2021-11-03 03:51:39,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:51:39,838 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:51:39,873 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_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2021-11-03 03:51:39,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:51:39,945 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:51:39,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:39 WrapperNode [2021-11-03 03:51:39,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:51:39,947 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:51:39,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:51:39,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:51:39,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:39" (1/1) ... [2021-11-03 03:51:39,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:39" (1/1) ... [2021-11-03 03:51:39,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:51:39,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:51:39,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:51:39,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:51:40,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:39" (1/1) ... [2021-11-03 03:51:40,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:39" (1/1) ... [2021-11-03 03:51:40,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:39" (1/1) ... [2021-11-03 03:51:40,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:39" (1/1) ... [2021-11-03 03:51:40,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:39" (1/1) ... [2021-11-03 03:51:40,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:39" (1/1) ... [2021-11-03 03:51:40,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:39" (1/1) ... [2021-11-03 03:51:40,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:51:40,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:51:40,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:51:40,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:51:40,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:39" (1/1) ... [2021-11-03 03:51:40,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:51:40,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:51:40,068 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:51:40,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:51:40,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-11-03 03:51:40,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-11-03 03:51:40,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 03:51:40,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:51:40,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE8 [2021-11-03 03:51:40,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:51:40,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:51:43,403 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:51:43,403 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-03 03:51:43,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:43 BoogieIcfgContainer [2021-11-03 03:51:43,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:51:43,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:51:43,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:51:43,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:51:43,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:51:39" (1/3) ... [2021-11-03 03:51:43,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750c7557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:43, skipping insertion in model container [2021-11-03 03:51:43,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:39" (2/3) ... [2021-11-03 03:51:43,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750c7557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:43, skipping insertion in model container [2021-11-03 03:51:43,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:43" (3/3) ... [2021-11-03 03:51:43,417 INFO L111 eAbstractionObserver]: Analyzing ICFG filter_iir.c [2021-11-03 03:51:43,424 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:51:43,424 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 03:51:43,495 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:51:43,504 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 03:51:43,504 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 03:51:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 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) [2021-11-03 03:51:43,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 03:51:43,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:43,543 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:43,544 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:51:43,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:43,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1398280527, now seen corresponding path program 1 times [2021-11-03 03:51:43,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:43,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206837008] [2021-11-03 03:51:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:43,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:43,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:43,572 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:43,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 03:51:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:47,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 03:51:47,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:47,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:47,291 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:47,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206837008] [2021-11-03 03:51:47,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206837008] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:47,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:47,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:51:47,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798126366] [2021-11-03 03:51:47,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 03:51:47,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:47,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 03:51:47,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:51:47,316 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:47,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:47,331 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-11-03 03:51:47,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 03:51:47,332 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-03 03:51:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:47,340 INFO L225 Difference]: With dead ends: 30 [2021-11-03 03:51:47,341 INFO L226 Difference]: Without dead ends: 14 [2021-11-03 03:51:47,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:51:47,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-03 03:51:47,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-03 03:51:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-03 03:51:47,374 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2021-11-03 03:51:47,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:47,374 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-03 03:51:47,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:47,375 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-03 03:51:47,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 03:51:47,376 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:47,376 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:47,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:47,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:47,591 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:51:47,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:47,592 INFO L85 PathProgramCache]: Analyzing trace with hash 376726835, now seen corresponding path program 1 times [2021-11-03 03:51:47,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:47,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039327149] [2021-11-03 03:51:47,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:47,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:47,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:47,596 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:47,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 03:51:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:50,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 03:51:50,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:51,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:51,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:51,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039327149] [2021-11-03 03:51:51,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039327149] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:51,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:51,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:51:51,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853884613] [2021-11-03 03:51:51,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:51:51,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:51,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:51:51,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:51,468 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:54,702 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-03 03:51:55,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:51:55,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-03 03:51:55,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:55,075 INFO L225 Difference]: With dead ends: 28 [2021-11-03 03:51:55,075 INFO L226 Difference]: Without dead ends: 14 [2021-11-03 03:51:55,076 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:51:55,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-03 03:51:55,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-03 03:51:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2021-11-03 03:51:55,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-03 03:51:55,079 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-11-03 03:51:55,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:55,079 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-03 03:51:55,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:55,080 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-03 03:51:55,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 03:51:55,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:55,081 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:55,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:55,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:55,293 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:51:55,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:55,294 INFO L85 PathProgramCache]: Analyzing trace with hash -303331535, now seen corresponding path program 1 times [2021-11-03 03:51:55,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:55,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190775737] [2021-11-03 03:51:55,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:55,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:55,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:55,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:55,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 03:56:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:57:00,275 WARN L261 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-03 03:57:00,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:57:01,741 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-03 03:57:01,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2286 treesize of output 2204 [2021-11-03 03:57:11,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:11,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,172 INFO L244 Elim1Store]: Index analysis took 210 ms [2021-11-03 03:57:12,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:12,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:12,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:12,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:12,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:12,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:12,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:12,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:12,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:12,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:12,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:12,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:12,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:12,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:12,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:12,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:12,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:15,755 INFO L354 Elim1Store]: treesize reduction 1144, result has 10.6 percent of original size [2021-11-03 03:57:15,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 26 select indices, 26 select index equivalence classes, 25 disjoint index pairs (out of 325 index pairs), introduced 26 new quantified variables, introduced 303 case distinctions, treesize of input 629 treesize of output 576 [2021-11-03 03:57:22,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:22,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,361 INFO L244 Elim1Store]: Index analysis took 1139 ms [2021-11-03 03:57:23,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:23,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:23,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:23,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:23,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:23,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:23,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:23,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:23,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:23,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:23,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:23,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:23,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:23,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:23,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:57:23,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:57:25,237 INFO L354 Elim1Store]: treesize reduction 576, result has 12.3 percent of original size [2021-11-03 03:57:25,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 29 select indices, 29 select index equivalence classes, 33 disjoint index pairs (out of 406 index pairs), introduced 29 new quantified variables, introduced 285 case distinctions, treesize of input 448 treesize of output 535 [2021-11-03 03:57:32,998 WARN L207 SmtUtils]: Spent 5.58 s on a formula simplification that was a NOOP. DAG size: 329 [2021-11-03 03:57:41,624 WARN L207 SmtUtils]: Spent 5.72 s on a formula simplification that was a NOOP. DAG size: 330 [2021-11-03 03:57:50,503 WARN L207 SmtUtils]: Spent 5.68 s on a formula simplification that was a NOOP. DAG size: 331 [2021-11-03 03:57:59,038 WARN L207 SmtUtils]: Spent 5.52 s on a formula simplification that was a NOOP. DAG size: 324 [2021-11-03 03:58:00,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:58:00,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:58:00,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:58:00,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:00:11,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-03 04:00:11,671 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-03 04:00:11,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:00:11,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190775737] [2021-11-03 04:00:11,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-03 04:00:11,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1653946099] [2021-11-03 04:00:11,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:00:11,676 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:00:11,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:00:11,677 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:00:11,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a11e0d9-36c9-40ee-9dff-3dbbb7d65bb0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process