./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/filter2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs --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 e42e84729022b725ebcfce66d0ece68757a1a9b385230356b4d45a24fc6b4ef2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:56:32,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:56:32,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:56:33,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:56:33,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:56:33,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:56:33,031 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:56:33,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:56:33,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:56:33,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:56:33,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:56:33,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:56:33,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:56:33,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:56:33,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:56:33,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:56:33,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:56:33,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:56:33,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:56:33,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:56:33,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:56:33,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:56:33,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:56:33,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:56:33,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:56:33,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:56:33,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:56:33,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:56:33,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:56:33,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:56:33,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:56:33,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:56:33,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:56:33,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:56:33,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:56:33,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:56:33,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:56:33,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:56:33,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:56:33,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:56:33,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:56:33,095 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:56:33,147 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:56:33,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:56:33,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:56:33,149 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:56:33,149 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:56:33,150 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:56:33,150 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:56:33,150 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:56:33,151 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:56:33,151 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:56:33,151 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:56:33,151 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:56:33,152 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:56:33,152 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:56:33,152 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:56:33,155 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:56:33,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:56:33,157 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:56:33,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:56:33,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:56:33,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:56:33,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:56:33,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:56:33,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:56:33,159 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:56:33,159 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:56:33,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:56:33,160 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:56:33,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:56:33,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:56:33,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:56:33,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:56:33,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:56:33,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:56:33,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:56:33,165 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:56:33,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:56:33,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:56:33,166 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:56:33,166 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:56:33,166 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_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e42e84729022b725ebcfce66d0ece68757a1a9b385230356b4d45a24fc6b4ef2 [2021-11-19 14:56:33,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:56:33,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:56:33,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:56:33,510 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:56:33,511 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:56:33,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/float-benchs/filter2.c [2021-11-19 14:56:33,625 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/data/2c74e30da/e22042fd0f49437a83d059fbcca229d3/FLAG507116f4f [2021-11-19 14:56:34,165 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:56:34,166 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/sv-benchmarks/c/float-benchs/filter2.c [2021-11-19 14:56:34,174 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/data/2c74e30da/e22042fd0f49437a83d059fbcca229d3/FLAG507116f4f [2021-11-19 14:56:34,536 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/data/2c74e30da/e22042fd0f49437a83d059fbcca229d3 [2021-11-19 14:56:34,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:56:34,541 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:56:34,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:56:34,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:56:34,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:56:34,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:56:34" (1/1) ... [2021-11-19 14:56:34,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fa87c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:34, skipping insertion in model container [2021-11-19 14:56:34,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:56:34" (1/1) ... [2021-11-19 14:56:34,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:56:34,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:56:34,766 WARN L230 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_8ea2bf77-fad1-4afd-a440-2ac42930c526/sv-benchmarks/c/float-benchs/filter2.c[652,665] [2021-11-19 14:56:34,795 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:56:34,806 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:56:34,833 WARN L230 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_8ea2bf77-fad1-4afd-a440-2ac42930c526/sv-benchmarks/c/float-benchs/filter2.c[652,665] [2021-11-19 14:56:34,846 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:56:34,872 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:56:34,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:34 WrapperNode [2021-11-19 14:56:34,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:56:34,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:56:34,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:56:34,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:56:34,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:34" (1/1) ... [2021-11-19 14:56:34,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:34" (1/1) ... [2021-11-19 14:56:34,925 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2021-11-19 14:56:34,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:56:34,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:56:34,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:56:34,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:56:34,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:34" (1/1) ... [2021-11-19 14:56:34,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:34" (1/1) ... [2021-11-19 14:56:34,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:34" (1/1) ... [2021-11-19 14:56:34,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:34" (1/1) ... [2021-11-19 14:56:34,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:34" (1/1) ... [2021-11-19 14:56:34,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:34" (1/1) ... [2021-11-19 14:56:34,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:34" (1/1) ... [2021-11-19 14:56:34,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:56:34,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:56:34,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:56:34,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:56:34,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:34" (1/1) ... [2021-11-19 14:56:34,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:56:34,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:56:34,991 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:56:34,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:56:35,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:56:35,039 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 14:56:35,039 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 14:56:35,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:56:35,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:56:35,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:56:35,104 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:56:35,106 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:56:35,254 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:56:35,301 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:56:35,302 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:56:35,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:56:35 BoogieIcfgContainer [2021-11-19 14:56:35,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:56:35,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:56:35,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:56:35,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:56:35,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:56:34" (1/3) ... [2021-11-19 14:56:35,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123a106c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:56:35, skipping insertion in model container [2021-11-19 14:56:35,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:34" (2/3) ... [2021-11-19 14:56:35,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123a106c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:56:35, skipping insertion in model container [2021-11-19 14:56:35,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:56:35" (3/3) ... [2021-11-19 14:56:35,315 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2.c [2021-11-19 14:56:35,335 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:56:35,335 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:56:35,438 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:56:35,447 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 [2021-11-19 14:56:35,448 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:56:35,467 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 14:56:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 14:56:35,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:56:35,481 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:56:35,482 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:56:35,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:56:35,494 INFO L85 PathProgramCache]: Analyzing trace with hash -251003801, now seen corresponding path program 1 times [2021-11-19 14:56:35,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:56:35,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071884078] [2021-11-19 14:56:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:56:35,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:56:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:56:35,695 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 14:56:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:56:35,790 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-19 14:56:35,793 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 14:56:35,795 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 14:56:35,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:56:35,809 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-19 14:56:35,812 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 14:56:35,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 02:56:35 BoogieIcfgContainer [2021-11-19 14:56:35,851 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 14:56:35,856 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 14:56:35,856 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 14:56:35,856 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 14:56:35,857 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:56:35" (3/4) ... [2021-11-19 14:56:35,864 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-19 14:56:35,865 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 14:56:35,867 INFO L158 Benchmark]: Toolchain (without parser) took 1325.04ms. Allocated memory is still 98.6MB. Free memory was 62.5MB in the beginning and 46.2MB in the end (delta: 16.2MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2021-11-19 14:56:35,868 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 98.6MB. Free memory was 68.3MB in the beginning and 68.3MB in the end (delta: 25.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:56:35,869 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.63ms. Allocated memory is still 98.6MB. Free memory was 62.3MB in the beginning and 73.0MB in the end (delta: -10.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:56:35,870 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.66ms. Allocated memory is still 98.6MB. Free memory was 73.0MB in the beginning and 71.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:56:35,871 INFO L158 Benchmark]: Boogie Preprocessor took 26.26ms. Allocated memory is still 98.6MB. Free memory was 71.3MB in the beginning and 70.4MB in the end (delta: 910.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:56:35,872 INFO L158 Benchmark]: RCFGBuilder took 351.29ms. Allocated memory is still 98.6MB. Free memory was 70.4MB in the beginning and 60.5MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:56:35,872 INFO L158 Benchmark]: TraceAbstraction took 545.08ms. Allocated memory is still 98.6MB. Free memory was 59.9MB in the beginning and 46.6MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 14:56:35,873 INFO L158 Benchmark]: Witness Printer took 9.51ms. Allocated memory is still 98.6MB. Free memory was 46.6MB in the beginning and 46.2MB in the end (delta: 369.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:56:35,878 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 98.6MB. Free memory was 68.3MB in the beginning and 68.3MB in the end (delta: 25.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.63ms. Allocated memory is still 98.6MB. Free memory was 62.3MB in the beginning and 73.0MB in the end (delta: -10.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.66ms. Allocated memory is still 98.6MB. Free memory was 73.0MB in the beginning and 71.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.26ms. Allocated memory is still 98.6MB. Free memory was 71.3MB in the beginning and 70.4MB in the end (delta: 910.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 351.29ms. Allocated memory is still 98.6MB. Free memory was 70.4MB in the beginning and 60.5MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 545.08ms. Allocated memory is still 98.6MB. Free memory was 59.9MB in the beginning and 46.6MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 9.51ms. Allocated memory is still 98.6MB. Free memory was 46.6MB in the beginning and 46.2MB in the end (delta: 369.5kB). There was no memory consumed. Max. memory is 16.1GB. * 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: 17]: 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 44, overapproximation of to_real at line 30, overapproximation of someBinaryArithmeticDOUBLEoperation at line 42. Possible FailurePath: [L22] double E, E0, E1, S0, S1, S; [L23] int i; [L25] E = __VERIFIER_nondet_double() [L26] E0 = __VERIFIER_nondet_double() [L27] CALL assume_abort_if_not(E >= 0. && E <= 1.) VAL [\old(cond)=1] [L15] COND FALSE !(!cond) [L27] RET assume_abort_if_not(E >= 0. && E <= 1.) [L28] CALL assume_abort_if_not(E0 >= 0. && E0 <= 1.) VAL [\old(cond)=1] [L15] COND FALSE !(!cond) [L28] RET assume_abort_if_not(E0 >= 0. && E0 <= 1.) [L30] S0 = 0 [L31] S = 0 [L33] i = 0 VAL [i=0] [L33] COND TRUE i <= 1000000 [L34] E1 = E0 [L35] E0 = E [L37] E = __VERIFIER_nondet_double() [L38] CALL assume_abort_if_not(E >= 0. && E <= 1.) VAL [\old(cond)=1] [L15] COND FALSE !(!cond) [L38] RET assume_abort_if_not(E >= 0. && E <= 1.) VAL [E=49, E=51, E=50, i=0] [L40] S1 = S0 [L41] S0 = S [L42] S = 0.7*E - E0*1.3 + E1*1.1 + S0*1.4 - S1*0.7 [L44] CALL __VERIFIER_assert(S >= -4. && S <= 4.) [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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, 15 NumberOfCodeBlocks, 15 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 [2021-11-19 14:56:35,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs --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 e42e84729022b725ebcfce66d0ece68757a1a9b385230356b4d45a24fc6b4ef2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:56:38,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:56:38,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:56:38,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:56:38,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:56:38,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:56:38,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:56:38,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:56:38,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:56:38,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:56:38,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:56:38,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:56:38,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:56:38,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:56:38,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:56:38,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:56:38,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:56:38,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:56:38,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:56:38,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:56:38,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:56:38,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:56:38,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:56:38,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:56:38,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:56:38,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:56:38,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:56:38,898 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:56:38,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:56:38,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:56:38,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:56:38,902 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:56:38,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:56:38,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:56:38,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:56:38,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:56:38,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:56:38,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:56:38,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:56:38,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:56:38,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:56:38,919 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:56:38,972 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:56:38,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:56:38,974 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:56:38,974 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:56:38,975 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:56:38,975 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:56:38,975 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:56:38,976 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:56:38,976 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:56:38,976 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:56:38,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:56:38,979 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:56:38,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:56:38,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:56:38,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:56:38,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:56:38,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:56:38,981 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:56:38,981 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:56:38,982 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:56:38,982 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:56:38,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:56:38,982 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:56:38,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:56:38,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:56:38,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:56:38,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:56:38,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:56:38,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:56:38,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:56:38,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:56:38,985 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:56:38,985 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:56:38,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:56:38,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:56:38,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:56:38,987 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_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e42e84729022b725ebcfce66d0ece68757a1a9b385230356b4d45a24fc6b4ef2 [2021-11-19 14:56:39,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:56:39,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:56:39,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:56:39,523 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:56:39,524 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:56:39,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/float-benchs/filter2.c [2021-11-19 14:56:39,599 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/data/b239c1e17/e2a237630f3046f7aeb61a7b258b555f/FLAG2355183e9 [2021-11-19 14:56:40,171 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:56:40,172 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/sv-benchmarks/c/float-benchs/filter2.c [2021-11-19 14:56:40,180 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/data/b239c1e17/e2a237630f3046f7aeb61a7b258b555f/FLAG2355183e9 [2021-11-19 14:56:40,540 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/data/b239c1e17/e2a237630f3046f7aeb61a7b258b555f [2021-11-19 14:56:40,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:56:40,551 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:56:40,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:56:40,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:56:40,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:56:40,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:56:40" (1/1) ... [2021-11-19 14:56:40,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3166545f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:40, skipping insertion in model container [2021-11-19 14:56:40,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:56:40" (1/1) ... [2021-11-19 14:56:40,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:56:40,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:56:40,753 WARN L230 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_8ea2bf77-fad1-4afd-a440-2ac42930c526/sv-benchmarks/c/float-benchs/filter2.c[652,665] [2021-11-19 14:56:40,774 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:56:40,788 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:56:40,803 WARN L230 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_8ea2bf77-fad1-4afd-a440-2ac42930c526/sv-benchmarks/c/float-benchs/filter2.c[652,665] [2021-11-19 14:56:40,811 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:56:40,843 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:56:40,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:40 WrapperNode [2021-11-19 14:56:40,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:56:40,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:56:40,846 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:56:40,846 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:56:40,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:40" (1/1) ... [2021-11-19 14:56:40,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:40" (1/1) ... [2021-11-19 14:56:40,926 INFO L137 Inliner]: procedures = 15, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2021-11-19 14:56:40,927 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:56:40,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:56:40,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:56:40,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:56:40,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:40" (1/1) ... [2021-11-19 14:56:40,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:40" (1/1) ... [2021-11-19 14:56:40,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:40" (1/1) ... [2021-11-19 14:56:40,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:40" (1/1) ... [2021-11-19 14:56:40,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:40" (1/1) ... [2021-11-19 14:56:40,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:40" (1/1) ... [2021-11-19 14:56:40,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:40" (1/1) ... [2021-11-19 14:56:40,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:56:40,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:56:40,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:56:40,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:56:40,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:40" (1/1) ... [2021-11-19 14:56:41,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:56:41,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:56:41,047 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:56:41,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:56:41,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:56:41,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:56:41,108 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 14:56:41,108 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 14:56:41,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:56:41,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:56:41,204 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:56:41,207 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:56:43,582 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:56:43,590 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:56:43,590 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:56:43,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:56:43 BoogieIcfgContainer [2021-11-19 14:56:43,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:56:43,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:56:43,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:56:43,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:56:43,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:56:40" (1/3) ... [2021-11-19 14:56:43,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23bcb8c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:56:43, skipping insertion in model container [2021-11-19 14:56:43,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:40" (2/3) ... [2021-11-19 14:56:43,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23bcb8c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:56:43, skipping insertion in model container [2021-11-19 14:56:43,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:56:43" (3/3) ... [2021-11-19 14:56:43,603 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2.c [2021-11-19 14:56:43,610 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:56:43,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:56:43,672 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:56:43,694 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 [2021-11-19 14:56:43,695 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:56:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 14:56:43,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 14:56:43,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:56:43,723 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:56:43,723 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:56:43,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:56:43,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1602622425, now seen corresponding path program 1 times [2021-11-19 14:56:43,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:56:43,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072408815] [2021-11-19 14:56:43,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:56:43,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:56:43,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:56:43,750 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:56:43,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:56:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:56:45,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:56:45,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:56:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 14:56:45,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:56:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 14:56:45,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:56:45,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072408815] [2021-11-19 14:56:45,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072408815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:56:45,999 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:56:46,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:56:46,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855131137] [2021-11-19 14:56:46,004 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:56:46,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:56:46,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:56:46,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:56:46,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:56:46,041 INFO L87 Difference]: Start difference. First operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:56:46,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:56:46,067 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-11-19 14:56:46,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:56:46,080 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-11-19 14:56:46,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:56:46,091 INFO L225 Difference]: With dead ends: 39 [2021-11-19 14:56:46,091 INFO L226 Difference]: Without dead ends: 17 [2021-11-19 14:56:46,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:56:46,107 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:56:46,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:56:46,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-19 14:56:46,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-19 14:56:46,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 14:56:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-19 14:56:46,170 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 22 [2021-11-19 14:56:46,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:56:46,171 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-19 14:56:46,172 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:56:46,173 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-19 14:56:46,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 14:56:46,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:56:46,177 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:56:46,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:56:46,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:56:46,401 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:56:46,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:56:46,403 INFO L85 PathProgramCache]: Analyzing trace with hash 168652453, now seen corresponding path program 1 times [2021-11-19 14:56:46,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:56:46,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309739509] [2021-11-19 14:56:46,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:56:46,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:56:46,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:56:46,406 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:56:46,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea2bf77-fad1-4afd-a440-2ac42930c526/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:56:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:56:52,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 14:56:52,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:08:49,833 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~E0~0#1| (_ FloatingPoint 11 53)) (|ULTIMATE.start_main_~E~0#1| (_ FloatingPoint 11 53)) (|ULTIMATE.start_main_~E1~0#1| (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (and (let ((.cse2 (let ((.cse5 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (.cse4 ((_ to_fp 11 53) roundNearestTiesToEven (/ 7.0 10.0)))) (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main_~E~0#1|) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~E0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 13.0 10.0)))) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~E1~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 11.0 10.0)))) (fp.mul roundNearestTiesToEven .cse5 ((_ to_fp 11 53) roundNearestTiesToEven (/ 7.0 5.0)))) (fp.mul roundNearestTiesToEven .cse5 .cse4)))) (.cse3 ((_ to_fp 11 53) roundNearestTiesToEven 4.0))) (let ((.cse0 (fp.leq .cse2 .cse3)) (.cse1 (fp.geq .cse2 (fp.neg .cse3)))) (or (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv0 32)) (or (not .cse0) (not .cse1))) (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv1 32)) .cse0 .cse1)))) (fp.geq |ULTIMATE.start_main_~E1~0#1| (_ +zero 11 53)) (fp.leq |ULTIMATE.start_main_~E1~0#1| .cse6) (fp.geq |ULTIMATE.start_main_~E0~0#1| (_ +zero 11 53)) (fp.geq |ULTIMATE.start_main_~E~0#1| (_ +zero 11 53)) (fp.leq |ULTIMATE.start_main_~E0~0#1| .cse6) (fp.leq |ULTIMATE.start_main_~E~0#1| .cse6)))) is different from false [2021-11-19 15:08:51,873 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~E0~0#1| (_ FloatingPoint 11 53)) (|ULTIMATE.start_main_~E~0#1| (_ FloatingPoint 11 53)) (|ULTIMATE.start_main_~E1~0#1| (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (and (let ((.cse2 (let ((.cse5 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) (.cse4 ((_ to_fp 11 53) roundNearestTiesToEven (/ 7.0 10.0)))) (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main_~E~0#1|) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~E0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 13.0 10.0)))) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~E1~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 11.0 10.0)))) (fp.mul roundNearestTiesToEven .cse5 ((_ to_fp 11 53) roundNearestTiesToEven (/ 7.0 5.0)))) (fp.mul roundNearestTiesToEven .cse5 .cse4)))) (.cse3 ((_ to_fp 11 53) roundNearestTiesToEven 4.0))) (let ((.cse0 (fp.leq .cse2 .cse3)) (.cse1 (fp.geq .cse2 (fp.neg .cse3)))) (or (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv0 32)) (or (not .cse0) (not .cse1))) (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv1 32)) .cse0 .cse1)))) (fp.geq |ULTIMATE.start_main_~E1~0#1| (_ +zero 11 53)) (fp.leq |ULTIMATE.start_main_~E1~0#1| .cse6) (fp.geq |ULTIMATE.start_main_~E0~0#1| (_ +zero 11 53)) (fp.geq |ULTIMATE.start_main_~E~0#1| (_ +zero 11 53)) (fp.leq |ULTIMATE.start_main_~E0~0#1| .cse6) (fp.leq |ULTIMATE.start_main_~E~0#1| .cse6)))) is different from true