./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/filter2_reinit.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter2_reinit.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7 --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 77348271d6b3efbe553fb980482d4643f648de35ae877e068f35f88b7419ce44 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:15:05,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:15:05,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:15:05,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:15:05,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:15:05,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:15:05,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:15:05,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:15:05,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:15:05,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:15:05,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:15:05,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:15:05,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:15:05,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:15:05,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:15:05,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:15:05,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:15:05,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:15:05,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:15:05,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:15:05,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:15:05,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:15:05,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:15:05,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:15:05,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:15:05,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:15:05,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:15:05,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:15:05,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:15:05,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:15:05,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:15:05,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:15:05,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:15:05,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:15:05,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:15:05,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:15:05,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:15:05,255 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:15:05,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:15:05,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:15:05,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:15:05,258 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:15:05,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:15:05,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:15:05,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:15:05,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:15:05,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:15:05,310 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:15:05,311 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:15:05,311 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:15:05,311 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:15:05,312 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:15:05,313 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:15:05,313 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:15:05,314 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:15:05,314 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:15:05,314 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:15:05,315 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:15:05,315 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:15:05,315 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:15:05,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:15:05,316 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:15:05,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:15:05,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:15:05,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:15:05,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:15:05,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:15:05,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:15:05,320 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:15:05,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:15:05,321 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:15:05,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:15:05,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:15:05,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:15:05,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:15:05,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:15:05,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:15:05,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:15:05,324 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:15:05,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:15:05,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:15:05,325 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:15:05,325 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:15:05,325 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_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77348271d6b3efbe553fb980482d4643f648de35ae877e068f35f88b7419ce44 [2021-11-25 18:15:05,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:15:05,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:15:05,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:15:05,670 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:15:05,670 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:15:05,672 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-benchs/filter2_reinit.c [2021-11-25 18:15:05,747 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/data/71c45c005/7feed857176947cfbe0065c6271c3b81/FLAG2c35814f8 [2021-11-25 18:15:06,224 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:15:06,224 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/sv-benchmarks/c/float-benchs/filter2_reinit.c [2021-11-25 18:15:06,237 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/data/71c45c005/7feed857176947cfbe0065c6271c3b81/FLAG2c35814f8 [2021-11-25 18:15:06,637 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/data/71c45c005/7feed857176947cfbe0065c6271c3b81 [2021-11-25 18:15:06,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:15:06,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:15:06,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:15:06,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:15:06,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:15:06,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:15:06" (1/1) ... [2021-11-25 18:15:06,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e84f807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:06, skipping insertion in model container [2021-11-25 18:15:06,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:15:06" (1/1) ... [2021-11-25 18:15:06,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:15:06,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:15:06,804 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_3e651142-2c16-43d8-84df-6d1aa92b96ed/sv-benchmarks/c/float-benchs/filter2_reinit.c[700,713] [2021-11-25 18:15:06,826 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:15:06,848 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:15:06,865 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_3e651142-2c16-43d8-84df-6d1aa92b96ed/sv-benchmarks/c/float-benchs/filter2_reinit.c[700,713] [2021-11-25 18:15:06,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:15:06,891 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:15:06,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:06 WrapperNode [2021-11-25 18:15:06,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:15:06,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:15:06,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:15:06,893 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:15:06,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:06" (1/1) ... [2021-11-25 18:15:06,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:06" (1/1) ... [2021-11-25 18:15:06,935 INFO L137 Inliner]: procedures = 15, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2021-11-25 18:15:06,935 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:15:06,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:15:06,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:15:06,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:15:06,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:06" (1/1) ... [2021-11-25 18:15:06,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:06" (1/1) ... [2021-11-25 18:15:06,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:06" (1/1) ... [2021-11-25 18:15:06,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:06" (1/1) ... [2021-11-25 18:15:06,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:06" (1/1) ... [2021-11-25 18:15:06,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:06" (1/1) ... [2021-11-25 18:15:06,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:06" (1/1) ... [2021-11-25 18:15:06,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:15:06,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:15:06,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:15:06,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:15:06,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:06" (1/1) ... [2021-11-25 18:15:06,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:15:06,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:15:07,005 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:15:07,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:15:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:15:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:15:07,053 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:15:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:15:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:15:07,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:15:07,110 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:15:07,111 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:15:07,221 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:15:07,255 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:15:07,255 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:15:07,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:15:07 BoogieIcfgContainer [2021-11-25 18:15:07,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:15:07,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:15:07,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:15:07,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:15:07,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:15:06" (1/3) ... [2021-11-25 18:15:07,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9fb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:15:07, skipping insertion in model container [2021-11-25 18:15:07,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:06" (2/3) ... [2021-11-25 18:15:07,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9fb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:15:07, skipping insertion in model container [2021-11-25 18:15:07,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:15:07" (3/3) ... [2021-11-25 18:15:07,266 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2_reinit.c [2021-11-25 18:15:07,272 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:15:07,272 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:15:07,316 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:15:07,323 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 [2021-11-25 18:15:07,324 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:15:07,340 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) [2021-11-25 18:15:07,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:15:07,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:07,345 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:15:07,346 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:07,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:07,351 INFO L85 PathProgramCache]: Analyzing trace with hash 501115960, now seen corresponding path program 1 times [2021-11-25 18:15:07,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:15:07,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138085971] [2021-11-25 18:15:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:07,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:15:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:15:07,471 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 18:15:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:15:07,521 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 18:15:07,523 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 18:15:07,524 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:15:07,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:15:07,531 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-25 18:15:07,533 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:15:07,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:15:07 BoogieIcfgContainer [2021-11-25 18:15:07,556 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:15:07,557 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:15:07,557 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:15:07,557 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:15:07,558 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:15:07" (3/4) ... [2021-11-25 18:15:07,561 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 18:15:07,561 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:15:07,562 INFO L158 Benchmark]: Toolchain (without parser) took 919.75ms. Allocated memory is still 104.9MB. Free memory was 76.1MB in the beginning and 52.8MB in the end (delta: 23.3MB). Peak memory consumption was 22.1MB. Max. memory is 16.1GB. [2021-11-25 18:15:07,563 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 104.9MB. Free memory is still 59.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:15:07,564 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.77ms. Allocated memory is still 104.9MB. Free memory was 75.8MB in the beginning and 81.0MB in the end (delta: -5.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 18:15:07,564 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.38ms. Allocated memory is still 104.9MB. Free memory was 81.0MB in the beginning and 79.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:15:07,565 INFO L158 Benchmark]: Boogie Preprocessor took 35.90ms. Allocated memory is still 104.9MB. Free memory was 79.3MB in the beginning and 78.3MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:15:07,566 INFO L158 Benchmark]: RCFGBuilder took 284.14ms. Allocated memory is still 104.9MB. Free memory was 78.3MB in the beginning and 67.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 18:15:07,566 INFO L158 Benchmark]: TraceAbstraction took 296.65ms. Allocated memory is still 104.9MB. Free memory was 67.1MB in the beginning and 53.1MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-25 18:15:07,567 INFO L158 Benchmark]: Witness Printer took 4.10ms. Allocated memory is still 104.9MB. Free memory was 53.1MB in the beginning and 52.8MB in the end (delta: 345.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:15:07,570 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 104.9MB. Free memory is still 59.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.77ms. Allocated memory is still 104.9MB. Free memory was 75.8MB in the beginning and 81.0MB in the end (delta: -5.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.38ms. Allocated memory is still 104.9MB. Free memory was 81.0MB in the beginning and 79.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.90ms. Allocated memory is still 104.9MB. Free memory was 79.3MB in the beginning and 78.3MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 284.14ms. Allocated memory is still 104.9MB. Free memory was 78.3MB in the beginning and 67.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 296.65ms. Allocated memory is still 104.9MB. Free memory was 67.1MB in the beginning and 53.1MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 4.10ms. Allocated memory is still 104.9MB. Free memory was 53.1MB in the beginning and 52.8MB in the end (delta: 345.9kB). 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: 18]: 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 53, overapproximation of to_real at line 31, overapproximation of someBinaryArithmeticDOUBLEoperation at line 51. Possible FailurePath: [L23] double E, E0, E1, S0, S1, S; [L24] int i; [L26] E = __VERIFIER_nondet_double() [L27] E0 = __VERIFIER_nondet_double() [L28] CALL assume_abort_if_not(E >= 0. && E <= 1.) VAL [\old(cond)=1] [L16] COND FALSE !(!cond) [L28] RET assume_abort_if_not(E >= 0. && E <= 1.) [L29] CALL assume_abort_if_not(E0 >= 0. && E0 <= 1.) VAL [\old(cond)=1] [L16] COND FALSE !(!cond) [L29] RET assume_abort_if_not(E0 >= 0. && E0 <= 1.) [L31] S0 = 0 [L32] S = 0 [L34] i = 0 VAL [i=0] [L34] COND TRUE i <= 1000000 [L36] E1 = E0 [L37] E0 = E [L39] E = __VERIFIER_nondet_double() [L40] CALL assume_abort_if_not(E >= 0. && E <= 1.) VAL [\old(cond)=1] [L16] COND FALSE !(!cond) [L40] RET assume_abort_if_not(E >= 0. && E <= 1.) VAL [E=49, E=49, E=49, i=0] [L42] COND TRUE __VERIFIER_nondet_int() [L43] E1 = E [L44] E0 = E [L45] S0 = E [L46] S = E [L49] S1 = S0 [L50] S0 = S [L51] S = 0.7*E - E0*1.3 + E1*1.1 + S0*1.4 - S1*0.7 [L53] CALL __VERIFIER_assert(S >= -4. && S <= 4.) [L18] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L18] 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: 0.2s, 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, 0.0s 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 [2021-11-25 18:15:07,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/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_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter2_reinit.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7 --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 77348271d6b3efbe553fb980482d4643f648de35ae877e068f35f88b7419ce44 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:15:10,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:15:10,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:15:10,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:15:10,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:15:10,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:15:10,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:15:10,173 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:15:10,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:15:10,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:15:10,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:15:10,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:15:10,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:15:10,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:15:10,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:15:10,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:15:10,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:15:10,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:15:10,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:15:10,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:15:10,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:15:10,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:15:10,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:15:10,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:15:10,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:15:10,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:15:10,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:15:10,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:15:10,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:15:10,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:15:10,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:15:10,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:15:10,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:15:10,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:15:10,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:15:10,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:15:10,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:15:10,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:15:10,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:15:10,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:15:10,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:15:10,239 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 18:15:10,288 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:15:10,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:15:10,290 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:15:10,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:15:10,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:15:10,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:15:10,291 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:15:10,292 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:15:10,292 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:15:10,292 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:15:10,293 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:15:10,293 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:15:10,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:15:10,295 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:15:10,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:15:10,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:15:10,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:15:10,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:15:10,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:15:10,297 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:15:10,297 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 18:15:10,297 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 18:15:10,297 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:15:10,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:15:10,298 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:15:10,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:15:10,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:15:10,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 18:15:10,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:15:10,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:15:10,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:15:10,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:15:10,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:15:10,300 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 18:15:10,300 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 18:15:10,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:15:10,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:15:10,301 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:15:10,301 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_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77348271d6b3efbe553fb980482d4643f648de35ae877e068f35f88b7419ce44 [2021-11-25 18:15:10,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:15:10,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:15:10,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:15:10,758 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:15:10,761 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:15:10,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-benchs/filter2_reinit.c [2021-11-25 18:15:10,847 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/data/6595e9c3b/47e8871ebcdb4a85b818dfe0e7b8ae67/FLAG4d2523f79 [2021-11-25 18:15:11,481 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:15:11,481 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/sv-benchmarks/c/float-benchs/filter2_reinit.c [2021-11-25 18:15:11,489 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/data/6595e9c3b/47e8871ebcdb4a85b818dfe0e7b8ae67/FLAG4d2523f79 [2021-11-25 18:15:11,845 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/data/6595e9c3b/47e8871ebcdb4a85b818dfe0e7b8ae67 [2021-11-25 18:15:11,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:15:11,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:15:11,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:15:11,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:15:11,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:15:11,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:15:11" (1/1) ... [2021-11-25 18:15:11,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7160f7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:11, skipping insertion in model container [2021-11-25 18:15:11,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:15:11" (1/1) ... [2021-11-25 18:15:11,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:15:11,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:15:12,062 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_3e651142-2c16-43d8-84df-6d1aa92b96ed/sv-benchmarks/c/float-benchs/filter2_reinit.c[700,713] [2021-11-25 18:15:12,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:15:12,096 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:15:12,111 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_3e651142-2c16-43d8-84df-6d1aa92b96ed/sv-benchmarks/c/float-benchs/filter2_reinit.c[700,713] [2021-11-25 18:15:12,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:15:12,142 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:15:12,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:12 WrapperNode [2021-11-25 18:15:12,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:15:12,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:15:12,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:15:12,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:15:12,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:12" (1/1) ... [2021-11-25 18:15:12,163 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:12" (1/1) ... [2021-11-25 18:15:12,185 INFO L137 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2021-11-25 18:15:12,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:15:12,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:15:12,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:15:12,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:15:12,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:12" (1/1) ... [2021-11-25 18:15:12,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:12" (1/1) ... [2021-11-25 18:15:12,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:12" (1/1) ... [2021-11-25 18:15:12,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:12" (1/1) ... [2021-11-25 18:15:12,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:12" (1/1) ... [2021-11-25 18:15:12,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:12" (1/1) ... [2021-11-25 18:15:12,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:12" (1/1) ... [2021-11-25 18:15:12,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:15:12,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:15:12,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:15:12,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:15:12,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:12" (1/1) ... [2021-11-25 18:15:12,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:15:12,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:15:12,303 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:15:12,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:15:12,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:15:12,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 18:15:12,366 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:15:12,366 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:15:12,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:15:12,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:15:12,470 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:15:12,473 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:15:14,879 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:15:14,885 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:15:14,885 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:15:14,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:15:14 BoogieIcfgContainer [2021-11-25 18:15:14,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:15:14,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:15:14,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:15:14,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:15:14,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:15:11" (1/3) ... [2021-11-25 18:15:14,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee67f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:15:14, skipping insertion in model container [2021-11-25 18:15:14,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:12" (2/3) ... [2021-11-25 18:15:14,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee67f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:15:14, skipping insertion in model container [2021-11-25 18:15:14,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:15:14" (3/3) ... [2021-11-25 18:15:14,898 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2_reinit.c [2021-11-25 18:15:14,904 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:15:14,904 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:15:15,014 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:15:15,022 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 [2021-11-25 18:15:15,022 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:15:15,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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) [2021-11-25 18:15:15,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 18:15:15,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:15,046 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:15:15,047 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:15,053 INFO L85 PathProgramCache]: Analyzing trace with hash 526466326, now seen corresponding path program 1 times [2021-11-25 18:15:15,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:15:15,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297278242] [2021-11-25 18:15:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:15,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:15:15,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:15:15,075 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:15:15,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 18:15:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:16,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 18:15:16,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:15:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:15:16,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:15:16,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:15:16,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297278242] [2021-11-25 18:15:16,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297278242] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:15:16,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:15:16,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:15:16,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880881752] [2021-11-25 18:15:16,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:15:16,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:15:16,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:15:16,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:15:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:15:16,872 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:15:16,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:16,910 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-11-25 18:15:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:15:16,914 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-11-25 18:15:16,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:16,922 INFO L225 Difference]: With dead ends: 41 [2021-11-25 18:15:16,922 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 18:15:16,926 INFO L932 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 [2021-11-25 18:15:16,932 INFO L933 BasicCegarLoop]: 25 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, 25 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 [2021-11-25 18:15:16,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:15:16,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 18:15:16,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-25 18:15:16,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2021-11-25 18:15:16,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-25 18:15:16,983 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 23 [2021-11-25 18:15:16,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:15:16,984 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-25 18:15:16,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:15:16,984 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-25 18:15:16,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 18:15:16,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:16,986 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:15:17,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-25 18:15:17,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:15:17,188 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:17,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:17,189 INFO L85 PathProgramCache]: Analyzing trace with hash -398587304, now seen corresponding path program 1 times [2021-11-25 18:15:17,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:15:17,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98307723] [2021-11-25 18:15:17,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:17,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:15:17,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:15:17,191 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:15:17,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 18:15:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:28,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 18:15:28,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:16:51,779 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~S0~0#1| (_ FloatingPoint 11 53))) (and (fp.leq |ULTIMATE.start_main_~S0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven 1.0)) (fp.geq |ULTIMATE.start_main_~S0~0#1| (_ +zero 11 53)) (let ((.cse2 (let ((.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_~S0~0#1|) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~S0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 13.0 10.0)))) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~S0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 11.0 10.0)))) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~S0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 7.0 5.0)))) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~S0~0#1| .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 .cse0 (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv1 32)) .cse1)))))) is different from false [2021-11-25 18:16:53,831 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~S0~0#1| (_ FloatingPoint 11 53))) (and (fp.leq |ULTIMATE.start_main_~S0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven 1.0)) (fp.geq |ULTIMATE.start_main_~S0~0#1| (_ +zero 11 53)) (let ((.cse2 (let ((.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_~S0~0#1|) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~S0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 13.0 10.0)))) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~S0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 11.0 10.0)))) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~S0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 7.0 5.0)))) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~S0~0#1| .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 .cse0 (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv1 32)) .cse1)))))) is different from true [2021-11-25 18:17:40,910 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~S0~0#1| (_ FloatingPoint 11 53))) (and (let ((.cse0 (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven (/ 7.0 10.0)))) (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main_~S0~0#1|) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~S0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 13.0 10.0)))) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~S0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 11.0 10.0)))) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~S0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 7.0 5.0)))) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~S0~0#1| .cse2)))) (.cse1 ((_ to_fp 11 53) roundNearestTiesToEven 4.0))) (or (not (fp.leq .cse0 .cse1)) (not (fp.geq .cse0 (fp.neg .cse1))))) (fp.leq |ULTIMATE.start_main_~S0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven 1.0)) (fp.geq |ULTIMATE.start_main_~S0~0#1| (_ +zero 11 53)))) is different from false [2021-11-25 18:17:42,963 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~S0~0#1| (_ FloatingPoint 11 53))) (and (let ((.cse0 (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven (/ 7.0 10.0)))) (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main_~S0~0#1|) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~S0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 13.0 10.0)))) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~S0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 11.0 10.0)))) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~S0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 7.0 5.0)))) (fp.mul roundNearestTiesToEven |ULTIMATE.start_main_~S0~0#1| .cse2)))) (.cse1 ((_ to_fp 11 53) roundNearestTiesToEven 4.0))) (or (not (fp.leq .cse0 .cse1)) (not (fp.geq .cse0 (fp.neg .cse1))))) (fp.leq |ULTIMATE.start_main_~S0~0#1| ((_ to_fp 11 53) roundNearestTiesToEven 1.0)) (fp.geq |ULTIMATE.start_main_~S0~0#1| (_ +zero 11 53)))) is different from true [2021-11-25 18:17:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:17:42,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:17:42,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:17:42,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98307723] [2021-11-25 18:17:42,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98307723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:17:42,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:17:42,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:17:42,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889990164] [2021-11-25 18:17:42,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:17:42,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:17:42,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:17:42,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:17:42,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=26, Unknown=4, NotChecked=22, Total=72 [2021-11-25 18:17:42,970 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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) [2021-11-25 18:17:45,949 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:17:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:17:46,137 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-11-25 18:17:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:17:46,139 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 23 [2021-11-25 18:17:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:17:46,140 INFO L225 Difference]: With dead ends: 30 [2021-11-25 18:17:46,140 INFO L226 Difference]: Without dead ends: 28 [2021-11-25 18:17:46,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=25, Invalid=35, Unknown=4, NotChecked=26, Total=90 [2021-11-25 18:17:46,143 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:17:46,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 35 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 1 Unknown, 40 Unchecked, 3.1s Time] [2021-11-25 18:17:46,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-25 18:17:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-25 18:17:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:17:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-25 18:17:46,155 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-11-25 18:17:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:17:46,156 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-25 18:17:46,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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) [2021-11-25 18:17:46,157 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-25 18:17:46,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 18:17:46,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:46,158 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:17:46,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-25 18:17:46,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:17:46,359 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:46,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:46,360 INFO L85 PathProgramCache]: Analyzing trace with hash -398527722, now seen corresponding path program 1 times [2021-11-25 18:17:46,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:17:46,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109291063] [2021-11-25 18:17:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:46,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:17:46,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:17:46,363 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:17:46,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e651142-2c16-43d8-84df-6d1aa92b96ed/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 18:17:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:17:55,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 18:17:55,643 INFO L286 TraceCheckSpWp]: Computing forward predicates...