./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/filter1.c.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter1.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8 --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 6403ea17225d9927b82c2cb5a5e13cab8e302736934880873dcec33bef71c423 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:13:51,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:13:51,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:13:51,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:13:51,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:13:51,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:13:51,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:13:51,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:13:51,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:13:51,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:13:51,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:13:51,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:13:51,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:13:51,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:13:51,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:13:51,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:13:51,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:13:51,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:13:51,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:13:51,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:13:51,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:13:51,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:13:51,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:13:51,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:13:51,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:13:51,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:13:51,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:13:51,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:13:51,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:13:51,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:13:51,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:13:51,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:13:51,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:13:51,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:13:51,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:13:51,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:13:51,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:13:51,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:13:51,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:13:51,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:13:51,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:13:51,247 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:13:51,295 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:13:51,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:13:51,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:13:51,297 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:13:51,298 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:13:51,298 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:13:51,298 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:13:51,299 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:13:51,299 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:13:51,299 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:13:51,300 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:13:51,301 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:13:51,301 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:13:51,302 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:13:51,302 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:13:51,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:13:51,303 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:13:51,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:13:51,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:13:51,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:13:51,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:13:51,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:13:51,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:13:51,305 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:13:51,305 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:13:51,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:13:51,306 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:13:51,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:13:51,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:13:51,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:13:51,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:13:51,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:13:51,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:13:51,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:13:51,310 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:13:51,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:13:51,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:13:51,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:13:51,311 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:13:51,311 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_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6403ea17225d9927b82c2cb5a5e13cab8e302736934880873dcec33bef71c423 [2021-11-07 01:13:51,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:13:51,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:13:51,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:13:51,664 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:13:51,665 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:13:51,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/float-benchs/filter1.c.p+cfa-reducer.c [2021-11-07 01:13:51,768 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/data/935a8f470/c4a28edc3a44469c97ad13dc67c4fabd/FLAG1f383292f [2021-11-07 01:13:52,282 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:13:52,283 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/sv-benchmarks/c/float-benchs/filter1.c.p+cfa-reducer.c [2021-11-07 01:13:52,290 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/data/935a8f470/c4a28edc3a44469c97ad13dc67c4fabd/FLAG1f383292f [2021-11-07 01:13:52,656 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/data/935a8f470/c4a28edc3a44469c97ad13dc67c4fabd [2021-11-07 01:13:52,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:13:52,660 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:13:52,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:13:52,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:13:52,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:13:52,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:52" (1/1) ... [2021-11-07 01:13:52,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3501f3c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:52, skipping insertion in model container [2021-11-07 01:13:52,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:52" (1/1) ... [2021-11-07 01:13:52,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:13:52,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:13:52,955 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/sv-benchmarks/c/float-benchs/filter1.c.p+cfa-reducer.c[1310,1323] [2021-11-07 01:13:52,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:13:52,971 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:13:52,988 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/sv-benchmarks/c/float-benchs/filter1.c.p+cfa-reducer.c[1310,1323] [2021-11-07 01:13:52,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:13:53,004 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:13:53,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:53 WrapperNode [2021-11-07 01:13:53,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:13:53,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:13:53,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:13:53,006 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:13:53,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:53" (1/1) ... [2021-11-07 01:13:53,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:53" (1/1) ... [2021-11-07 01:13:53,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:13:53,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:13:53,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:13:53,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:13:53,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:53" (1/1) ... [2021-11-07 01:13:53,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:53" (1/1) ... [2021-11-07 01:13:53,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:53" (1/1) ... [2021-11-07 01:13:53,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:53" (1/1) ... [2021-11-07 01:13:53,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:53" (1/1) ... [2021-11-07 01:13:53,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:53" (1/1) ... [2021-11-07 01:13:53,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:53" (1/1) ... [2021-11-07 01:13:53,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:13:53,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:13:53,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:13:53,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:13:53,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:53" (1/1) ... [2021-11-07 01:13:53,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:13:53,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:13:53,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:13:53,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:13:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:13:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:13:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:13:53,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:13:53,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:13:53,483 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:13:53,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:13:53 BoogieIcfgContainer [2021-11-07 01:13:53,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:13:53,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:13:53,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:13:53,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:13:53,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:13:52" (1/3) ... [2021-11-07 01:13:53,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8f648b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:13:53, skipping insertion in model container [2021-11-07 01:13:53,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:53" (2/3) ... [2021-11-07 01:13:53,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8f648b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:13:53, skipping insertion in model container [2021-11-07 01:13:53,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:13:53" (3/3) ... [2021-11-07 01:13:53,494 INFO L111 eAbstractionObserver]: Analyzing ICFG filter1.c.p+cfa-reducer.c [2021-11-07 01:13:53,500 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:13:53,501 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:13:53,552 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:13:53,558 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 [2021-11-07 01:13:53,559 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:13:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 01:13:53,579 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:53,580 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:53,580 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:53,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:53,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1090715464, now seen corresponding path program 1 times [2021-11-07 01:13:53,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:53,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142779462] [2021-11-07 01:13:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:53,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:53,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:53,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142779462] [2021-11-07 01:13:53,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142779462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:53,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:53,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:53,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895593008] [2021-11-07 01:13:53,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:53,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:53,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:53,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:53,849 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:53,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:53,902 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2021-11-07 01:13:53,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:53,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 01:13:53,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:53,911 INFO L225 Difference]: With dead ends: 32 [2021-11-07 01:13:53,912 INFO L226 Difference]: Without dead ends: 12 [2021-11-07 01:13:53,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:53,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-07 01:13:53,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-07 01:13:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-07 01:13:53,944 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2021-11-07 01:13:53,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:53,945 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-07 01:13:53,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:53,945 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-07 01:13:53,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 01:13:53,946 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:53,946 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:53,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:13:53,946 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:53,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:53,947 INFO L85 PathProgramCache]: Analyzing trace with hash -201086419, now seen corresponding path program 1 times [2021-11-07 01:13:53,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:53,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324705650] [2021-11-07 01:13:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:53,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:54,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:54,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324705650] [2021-11-07 01:13:54,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324705650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:54,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:54,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 01:13:54,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655488344] [2021-11-07 01:13:54,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:13:54,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:54,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:13:54,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:13:54,018 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:54,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:54,082 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-07 01:13:54,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:13:54,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 01:13:54,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:54,083 INFO L225 Difference]: With dead ends: 29 [2021-11-07 01:13:54,083 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 01:13:54,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:13:54,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 01:13:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 14. [2021-11-07 01:13:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-07 01:13:54,090 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2021-11-07 01:13:54,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:54,090 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-07 01:13:54,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:54,091 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-07 01:13:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 01:13:54,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:54,091 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:54,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:13:54,092 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:54,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:54,093 INFO L85 PathProgramCache]: Analyzing trace with hash -184075758, now seen corresponding path program 1 times [2021-11-07 01:13:54,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:54,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403663532] [2021-11-07 01:13:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:54,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:13:54,111 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 01:13:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:13:54,144 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-07 01:13:54,145 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 01:13:54,146 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:13:54,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:13:54,151 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-07 01:13:54,154 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:13:54,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:13:54 BoogieIcfgContainer [2021-11-07 01:13:54,178 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:13:54,179 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:13:54,179 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:13:54,179 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:13:54,180 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:13:53" (3/4) ... [2021-11-07 01:13:54,183 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 01:13:54,183 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:13:54,185 INFO L168 Benchmark]: Toolchain (without parser) took 1523.57 ms. Allocated memory is still 111.1 MB. Free memory was 74.4 MB in the beginning and 39.8 MB in the end (delta: 34.6 MB). Peak memory consumption was 32.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:13:54,185 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 111.1 MB. Free memory was 86.4 MB in the beginning and 86.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:13:54,186 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.25 ms. Allocated memory is still 111.1 MB. Free memory was 74.3 MB in the beginning and 85.0 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:13:54,187 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.59 ms. Allocated memory is still 111.1 MB. Free memory was 85.0 MB in the beginning and 83.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:13:54,187 INFO L168 Benchmark]: Boogie Preprocessor took 20.48 ms. Allocated memory is still 111.1 MB. Free memory was 83.7 MB in the beginning and 82.9 MB in the end (delta: 809.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:13:54,188 INFO L168 Benchmark]: RCFGBuilder took 425.26 ms. Allocated memory is still 111.1 MB. Free memory was 82.3 MB in the beginning and 71.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:13:54,188 INFO L168 Benchmark]: TraceAbstraction took 691.27 ms. Allocated memory is still 111.1 MB. Free memory was 70.9 MB in the beginning and 40.4 MB in the end (delta: 30.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:13:54,189 INFO L168 Benchmark]: Witness Printer took 4.12 ms. Allocated memory is still 111.1 MB. Free memory was 40.4 MB in the beginning and 39.8 MB in the end (delta: 588.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:13:54,192 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 111.1 MB. Free memory was 86.4 MB in the beginning and 86.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 339.25 ms. Allocated memory is still 111.1 MB. Free memory was 74.3 MB in the beginning and 85.0 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.59 ms. Allocated memory is still 111.1 MB. Free memory was 85.0 MB in the beginning and 83.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.48 ms. Allocated memory is still 111.1 MB. Free memory was 83.7 MB in the beginning and 82.9 MB in the end (delta: 809.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 425.26 ms. Allocated memory is still 111.1 MB. Free memory was 82.3 MB in the beginning and 71.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 691.27 ms. Allocated memory is still 111.1 MB. Free memory was 70.9 MB in the beginning and 40.4 MB in the end (delta: 30.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * Witness Printer took 4.12 ms. Allocated memory is still 111.1 MB. Free memory was 40.4 MB in the beginning and 39.8 MB in the end (delta: 588.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 56]: 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 43, overapproximation of to_real at line 39, overapproximation of someBinaryArithmeticDOUBLEoperation at line 80. Possible FailurePath: [L1] int __return_main; [L15] double main__E0; [L16] double main__E1; [L17] double main__S; [L18] int main__i; [L19] main__E1 = 0 [L20] main__S = 0 [L21] main__i = 0 VAL [__return_main=0] [L23] COND TRUE main__i <= 1000000 [L25] main__E0 = __VERIFIER_nondet_double() [L26] int main____CPAchecker_TMP_0; VAL [__return_main=0] [L27] COND TRUE main__E0 >= -1.0 VAL [__return_main=0] [L29] COND TRUE main__E0 <= 1.0 [L31] main____CPAchecker_TMP_0 = 1 VAL [__return_main=0] [L33] COND TRUE main____CPAchecker_TMP_0 != 0 [L35] int main____CPAchecker_TMP_1; [L36] main____CPAchecker_TMP_1 = __VERIFIER_nondet_int() [L37] COND FALSE !(!(main____CPAchecker_TMP_1 == 0)) [L80] main__S = ((0.999 * main__S) + main__E0) - main__E1 [L41] main__E1 = main__E0 [L42] int main____CPAchecker_TMP_2; VAL [__return_main=0] [L43] COND FALSE !(main__S >= -10000.0) VAL [__return_main=0] [L69] main____CPAchecker_TMP_2 = 0 VAL [__return_main=0] [L50] int __tmp_1; [L51] __tmp_1 = main____CPAchecker_TMP_2 [L52] int __VERIFIER_assert__cond; [L53] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0] [L54] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0] [L56] reach_error() VAL [__return_main=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 32 SDslu, 40 SDs, 0 SdLazy, 25 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 13 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 28 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 [2021-11-07 01:13:54,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/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_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter1.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8 --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 6403ea17225d9927b82c2cb5a5e13cab8e302736934880873dcec33bef71c423 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:13:56,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:13:56,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:13:56,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:13:56,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:13:56,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:13:56,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:13:56,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:13:56,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:13:56,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:13:56,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:13:56,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:13:56,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:13:56,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:13:56,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:13:56,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:13:56,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:13:56,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:13:56,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:13:56,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:13:56,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:13:56,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:13:56,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:13:56,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:13:56,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:13:56,705 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:13:56,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:13:56,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:13:56,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:13:56,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:13:56,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:13:56,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:13:56,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:13:56,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:13:56,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:13:56,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:13:56,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:13:56,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:13:56,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:13:56,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:13:56,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:13:56,725 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:13:56,766 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:13:56,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:13:56,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:13:56,767 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:13:56,768 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:13:56,768 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:13:56,768 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:13:56,768 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:13:56,768 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:13:56,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:13:56,771 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:13:56,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:13:56,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:13:56,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:13:56,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:13:56,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:13:56,772 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:13:56,772 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:13:56,772 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:13:56,773 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:13:56,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:13:56,773 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:13:56,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:13:56,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:13:56,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:13:56,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:13:56,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:13:56,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:13:56,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:13:56,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:13:56,775 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:13:56,775 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:13:56,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:13:56,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:13:56,776 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:13:56,776 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_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6403ea17225d9927b82c2cb5a5e13cab8e302736934880873dcec33bef71c423 [2021-11-07 01:13:57,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:13:57,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:13:57,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:13:57,157 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:13:57,166 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:13:57,167 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/float-benchs/filter1.c.p+cfa-reducer.c [2021-11-07 01:13:57,243 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/data/db06680e3/785cfaa9c7ba4830aa260ccf6eab741e/FLAGde4cdd4f7 [2021-11-07 01:13:57,866 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:13:57,868 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/sv-benchmarks/c/float-benchs/filter1.c.p+cfa-reducer.c [2021-11-07 01:13:57,882 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/data/db06680e3/785cfaa9c7ba4830aa260ccf6eab741e/FLAGde4cdd4f7 [2021-11-07 01:13:58,160 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/data/db06680e3/785cfaa9c7ba4830aa260ccf6eab741e [2021-11-07 01:13:58,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:13:58,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:13:58,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:13:58,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:13:58,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:13:58,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:58" (1/1) ... [2021-11-07 01:13:58,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7081e95d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:58, skipping insertion in model container [2021-11-07 01:13:58,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:58" (1/1) ... [2021-11-07 01:13:58,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:13:58,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:13:58,402 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/sv-benchmarks/c/float-benchs/filter1.c.p+cfa-reducer.c[1310,1323] [2021-11-07 01:13:58,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:13:58,426 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:13:58,445 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/sv-benchmarks/c/float-benchs/filter1.c.p+cfa-reducer.c[1310,1323] [2021-11-07 01:13:58,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:13:58,463 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:13:58,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:58 WrapperNode [2021-11-07 01:13:58,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:13:58,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:13:58,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:13:58,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:13:58,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:58" (1/1) ... [2021-11-07 01:13:58,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:58" (1/1) ... [2021-11-07 01:13:58,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:13:58,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:13:58,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:13:58,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:13:58,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:58" (1/1) ... [2021-11-07 01:13:58,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:58" (1/1) ... [2021-11-07 01:13:58,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:58" (1/1) ... [2021-11-07 01:13:58,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:58" (1/1) ... [2021-11-07 01:13:58,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:58" (1/1) ... [2021-11-07 01:13:58,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:58" (1/1) ... [2021-11-07 01:13:58,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:58" (1/1) ... [2021-11-07 01:13:58,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:13:58,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:13:58,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:13:58,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:13:58,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:58" (1/1) ... [2021-11-07 01:13:58,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:13:58,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:13:58,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:13:58,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:13:58,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:13:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:13:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:13:58,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:14:00,310 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:14:00,311 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:14:00,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:00 BoogieIcfgContainer [2021-11-07 01:14:00,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:14:00,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:14:00,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:14:00,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:14:00,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:13:58" (1/3) ... [2021-11-07 01:14:00,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef55882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:00, skipping insertion in model container [2021-11-07 01:14:00,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:58" (2/3) ... [2021-11-07 01:14:00,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef55882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:00, skipping insertion in model container [2021-11-07 01:14:00,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:00" (3/3) ... [2021-11-07 01:14:00,322 INFO L111 eAbstractionObserver]: Analyzing ICFG filter1.c.p+cfa-reducer.c [2021-11-07 01:14:00,327 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:14:00,328 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:14:00,371 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:14:00,379 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 [2021-11-07 01:14:00,380 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:14:00,393 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:14:00,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:00,399 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:00,400 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:00,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:00,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1824272086, now seen corresponding path program 1 times [2021-11-07 01:14:00,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:00,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204756714] [2021-11-07 01:14:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:00,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:00,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:00,429 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:00,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:14:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:00,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:00,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:00,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:00,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:00,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204756714] [2021-11-07 01:14:00,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204756714] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:00,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:00,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:00,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093748616] [2021-11-07 01:14:00,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:00,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:00,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:00,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:00,794 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:00,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:00,840 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-11-07 01:14:00,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:00,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 01:14:00,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:00,850 INFO L225 Difference]: With dead ends: 40 [2021-11-07 01:14:00,851 INFO L226 Difference]: Without dead ends: 15 [2021-11-07 01:14:00,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:00,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-07 01:14:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-07 01:14:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-11-07 01:14:00,886 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 13 [2021-11-07 01:14:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:00,887 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-11-07 01:14:00,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-11-07 01:14:00,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:14:00,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:00,889 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:00,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:01,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:01,102 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:01,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2000333105, now seen corresponding path program 1 times [2021-11-07 01:14:01,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:01,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812639361] [2021-11-07 01:14:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:01,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:01,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:01,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:01,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:14:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:01,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:14:01,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:01,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:01,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:01,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812639361] [2021-11-07 01:14:01,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812639361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:01,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:01,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:14:01,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741954609] [2021-11-07 01:14:01,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:14:01,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:01,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:14:01,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:14:01,424 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:01,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:01,588 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-11-07 01:14:01,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:14:01,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 01:14:01,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:01,590 INFO L225 Difference]: With dead ends: 41 [2021-11-07 01:14:01,590 INFO L226 Difference]: Without dead ends: 39 [2021-11-07 01:14:01,591 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:14:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-07 01:14:01,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 17. [2021-11-07 01:14:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-07 01:14:01,598 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2021-11-07 01:14:01,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:01,598 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-07 01:14:01,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:01,599 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-07 01:14:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:14:01,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:01,600 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:01,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:01,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:01,801 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:01,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:01,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1983322444, now seen corresponding path program 1 times [2021-11-07 01:14:01,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:01,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333408431] [2021-11-07 01:14:01,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:01,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:01,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:01,810 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:01,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:14:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:01,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:01,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:02,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:02,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:02,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333408431] [2021-11-07 01:14:02,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333408431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:02,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:02,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:14:02,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934579046] [2021-11-07 01:14:02,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:14:02,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:02,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:14:02,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:02,138 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:03,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:03,055 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-11-07 01:14:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:14:03,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 01:14:03,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:03,057 INFO L225 Difference]: With dead ends: 52 [2021-11-07 01:14:03,057 INFO L226 Difference]: Without dead ends: 37 [2021-11-07 01:14:03,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-07 01:14:03,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 20. [2021-11-07 01:14:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:03,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-07 01:14:03,063 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2021-11-07 01:14:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:03,064 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-07 01:14:03,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-07 01:14:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:14:03,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:03,065 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:03,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:03,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:03,281 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:03,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:03,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1270566899, now seen corresponding path program 1 times [2021-11-07 01:14:03,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:03,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101840020] [2021-11-07 01:14:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:03,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:03,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:03,284 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:03,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:14:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:03,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:14:03,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:04,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:10,616 WARN L838 $PredicateComparison]: unable to prove that (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) c_ULTIMATE.start_main_~main__E0~0) c_ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) is different from false [2021-11-07 01:14:12,666 WARN L860 $PredicateComparison]: unable to prove that (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) c_ULTIMATE.start_main_~main__E0~0) c_ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) is different from true [2021-11-07 01:14:27,031 WARN L838 $PredicateComparison]: unable to prove that (or (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) c_ULTIMATE.start_main_~main__E0~0) c_ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (not (fp.leq c_ULTIMATE.start_main_~main__E0~0 ((_ to_fp 11 53) c_currentRoundingMode 1.0)))) is different from false [2021-11-07 01:14:29,078 WARN L860 $PredicateComparison]: unable to prove that (or (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) c_ULTIMATE.start_main_~main__E0~0) c_ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (not (fp.leq c_ULTIMATE.start_main_~main__E0~0 ((_ to_fp 11 53) c_currentRoundingMode 1.0)))) is different from true [2021-11-07 01:14:43,586 WARN L860 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~main__E0~0 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) ULTIMATE.start_main_~main__E0~0) c_ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (not (fp.leq ULTIMATE.start_main_~main__E0~0 .cse0)) (not (fp.geq ULTIMATE.start_main_~main__E0~0 (fp.neg .cse0)))))) is different from true [2021-11-07 01:14:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:56,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:56,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101840020] [2021-11-07 01:14:56,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101840020] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:56,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:56,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 01:14:56,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727954148] [2021-11-07 01:14:56,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:14:56,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:56,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:14:56,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=30, Unknown=5, NotChecked=42, Total=110 [2021-11-07 01:14:56,054 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:58,346 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (and (forall ((ULTIMATE.start_main_~main__E0~0 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) ULTIMATE.start_main_~main__E0~0) c_ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (not (fp.leq ULTIMATE.start_main_~main__E0~0 .cse0)) (not (fp.geq ULTIMATE.start_main_~main__E0~0 (fp.neg .cse0)))))) (= .cse1 c_ULTIMATE.start_main_~main__E1~0) (= .cse1 c_ULTIMATE.start_main_~main__S~0) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-07 01:15:00,409 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (fp.geq c_ULTIMATE.start_main_~main__E0~0 (fp.neg .cse0)) (= .cse1 c_ULTIMATE.start_main_~main__E1~0) (= .cse1 c_ULTIMATE.start_main_~main__S~0) (or (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) c_ULTIMATE.start_main_~main__E0~0) c_ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (not (fp.leq c_ULTIMATE.start_main_~main__E0~0 .cse0))) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-07 01:15:02,478 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (and (fp.leq c_ULTIMATE.start_main_~main__E0~0 .cse0) (fp.geq c_ULTIMATE.start_main_~main__E0~0 (fp.neg .cse0)) (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) c_ULTIMATE.start_main_~main__E0~0) c_ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (= .cse1 c_ULTIMATE.start_main_~main__E1~0) (= .cse1 c_ULTIMATE.start_main_~main__S~0) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-07 01:15:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:05,635 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2021-11-07 01:15:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:15:05,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 01:15:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:05,637 INFO L225 Difference]: With dead ends: 68 [2021-11-07 01:15:05,638 INFO L226 Difference]: Without dead ends: 50 [2021-11-07 01:15:05,639 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=39, Invalid=33, Unknown=8, NotChecked=102, Total=182 [2021-11-07 01:15:05,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-07 01:15:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 25. [2021-11-07 01:15:05,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:15:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-11-07 01:15:05,645 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 13 [2021-11-07 01:15:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:05,646 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-11-07 01:15:05,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:15:05,646 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-11-07 01:15:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 01:15:05,647 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:05,647 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:15:05,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:05,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:05,863 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:15:05,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:05,864 INFO L85 PathProgramCache]: Analyzing trace with hash -3307942, now seen corresponding path program 1 times [2021-11-07 01:15:05,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:05,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482205692] [2021-11-07 01:15:05,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:05,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:05,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:05,866 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:05,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:15:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:06,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:15:06,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:49,257 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~main__E1~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~main__E0~0 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (and (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 999.0 1000.0)) ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) ULTIMATE.start_main_~main__E0~0) ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) roundNearestTiesToEven 10000.0)))) (fp.leq ULTIMATE.start_main_~main__E1~0 .cse0) (fp.geq ULTIMATE.start_main_~main__E0~0 (fp.neg .cse0))))) is different from false [2021-11-07 01:15:51,266 WARN L860 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~main__E1~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~main__E0~0 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (and (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 999.0 1000.0)) ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) ULTIMATE.start_main_~main__E0~0) ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) roundNearestTiesToEven 10000.0)))) (fp.leq ULTIMATE.start_main_~main__E1~0 .cse0) (fp.geq ULTIMATE.start_main_~main__E0~0 (fp.neg .cse0))))) is different from true [2021-11-07 01:16:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-07 01:16:43,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:51,420 WARN L838 $PredicateComparison]: unable to prove that (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) c_ULTIMATE.start_main_~main__E0~0) c_ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) is different from false [2021-11-07 01:16:53,476 WARN L860 $PredicateComparison]: unable to prove that (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) c_ULTIMATE.start_main_~main__E0~0) c_ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) is different from true [2021-11-07 01:17:07,956 WARN L838 $PredicateComparison]: unable to prove that (or (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) c_ULTIMATE.start_main_~main__E0~0) c_ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (not (fp.leq c_ULTIMATE.start_main_~main__E0~0 ((_ to_fp 11 53) c_currentRoundingMode 1.0)))) is different from false [2021-11-07 01:17:10,016 WARN L860 $PredicateComparison]: unable to prove that (or (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) c_ULTIMATE.start_main_~main__E0~0) c_ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (not (fp.leq c_ULTIMATE.start_main_~main__E0~0 ((_ to_fp 11 53) c_currentRoundingMode 1.0)))) is different from true [2021-11-07 01:17:24,593 WARN L860 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~main__E0~0 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) ULTIMATE.start_main_~main__E0~0) c_ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (not (fp.leq ULTIMATE.start_main_~main__E0~0 .cse0)) (not (fp.geq ULTIMATE.start_main_~main__E0~0 (fp.neg .cse0)))))) is different from true [2021-11-07 01:18:41,554 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~main__E0~0_14 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (not (fp.geq v_ULTIMATE.start_main_~main__E0~0_14 (fp.neg .cse0))) (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) v_ULTIMATE.start_main_~main__E0~0_14) c_ULTIMATE.start_main_~main__E0~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (not (fp.leq v_ULTIMATE.start_main_~main__E0~0_14 .cse0))))) is different from true [2021-11-07 01:19:02,960 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((v_ULTIMATE.start_main_~main__E0~0_14 (_ FloatingPoint 11 53))) (or (not (fp.geq v_ULTIMATE.start_main_~main__E0~0_14 (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 1.0)))) (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) v_ULTIMATE.start_main_~main__E0~0_14) c_ULTIMATE.start_main_~main__E0~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))))) (not (fp.leq c_ULTIMATE.start_main_~main__E0~0 ((_ to_fp 11 53) c_currentRoundingMode 1.0)))) is different from true [2021-11-07 01:19:23,482 WARN L860 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~main__E0~0 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (forall ((v_ULTIMATE.start_main_~main__E0~0_14 (_ FloatingPoint 11 53))) (or (not (fp.geq v_ULTIMATE.start_main_~main__E0~0_14 (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 1.0)))) (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) v_ULTIMATE.start_main_~main__E0~0_14) ULTIMATE.start_main_~main__E0~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))))) (not (fp.leq ULTIMATE.start_main_~main__E0~0 .cse0)) (not (fp.geq ULTIMATE.start_main_~main__E0~0 (fp.neg .cse0)))))) is different from true [2021-11-07 01:19:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-07 01:19:55,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:55,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482205692] [2021-11-07 01:19:55,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482205692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:19:55,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2040689840] [2021-11-07 01:19:55,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:55,744 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:19:55,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:19:55,750 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:19:55,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 01:19:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:56,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:19:56,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-07 01:21:18,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:04,585 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~main__E0~0_18 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (not (fp.leq v_ULTIMATE.start_main_~main__E0~0_18 .cse0)) (not (fp.geq v_ULTIMATE.start_main_~main__E0~0_18 (fp.neg .cse0))) (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) v_ULTIMATE.start_main_~main__E0~0_18) c_ULTIMATE.start_main_~main__E0~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0)))))) is different from true [2021-11-07 01:24:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-07 01:24:15,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2040689840] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:24:15,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278708877] [2021-11-07 01:24:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:15,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:24:15,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:24:15,424 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:24:15,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f8b2a9-8822-48c5-8ab7-109ffeb358db/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 01:24:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:19,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:24:19,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-07 01:25:11,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:42,741 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) c_ULTIMATE.start_main_~main__E0~0) c_ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (not (fp.leq c_ULTIMATE.start_main_~main__E0~0 .cse0)) (not (fp.geq c_ULTIMATE.start_main_~main__E0~0 (fp.neg .cse0))))) is different from false [2021-11-07 01:25:44,794 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) c_ULTIMATE.start_main_~main__E0~0) c_ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (not (fp.leq c_ULTIMATE.start_main_~main__E0~0 .cse0)) (not (fp.geq c_ULTIMATE.start_main_~main__E0~0 (fp.neg .cse0))))) is different from true [2021-11-07 01:25:59,281 WARN L860 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~nondet7| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) |ULTIMATE.start_main_#t~nondet7|) c_ULTIMATE.start_main_~main__E1~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (not (fp.leq |ULTIMATE.start_main_#t~nondet7| .cse0)) (not (fp.geq |ULTIMATE.start_main_#t~nondet7| (fp.neg .cse0)))))) is different from true [2021-11-07 01:27:03,549 WARN L860 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~nondet7| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) c_ULTIMATE.start_main_~main__S~0) |ULTIMATE.start_main_#t~nondet7|) c_ULTIMATE.start_main_~main__E0~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (not (fp.leq |ULTIMATE.start_main_#t~nondet7| .cse0)) (not (fp.geq |ULTIMATE.start_main_#t~nondet7| (fp.neg .cse0)))))) is different from true [2021-11-07 01:28:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-07 01:28:05,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278708877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:28:05,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:28:05,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 11] total 23 [2021-11-07 01:28:05,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955318299] [2021-11-07 01:28:05,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 01:28:05,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:05,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 01:28:05,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=88, Unknown=22, NotChecked=330, Total=506 [2021-11-07 01:28:05,461 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:09,588 WARN L838 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (forall ((ULTIMATE.start_main_~main__E0~0 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (forall ((v_ULTIMATE.start_main_~main__E0~0_14 (_ FloatingPoint 11 53))) (or (not (fp.geq v_ULTIMATE.start_main_~main__E0~0_14 (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 1.0)))) (fp.geq (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) v_ULTIMATE.start_main_~main__E0~0_14) ULTIMATE.start_main_~main__E0~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode 10000.0))))) (not (fp.leq ULTIMATE.start_main_~main__E0~0 .cse0)) (not (fp.geq ULTIMATE.start_main_~main__E0~0 (fp.neg .cse0))))))) is different from false