./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/interpolation.c.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/interpolation.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --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 198a885d453136e0f485e10bae010eb2ed68236b2d57919bf162df9bdad27ee6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:58:21,785 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:58:21,914 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:58:21,920 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:58:21,921 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:58:21,964 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:58:21,965 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:58:21,966 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:58:21,968 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:58:21,973 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:58:21,974 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:58:21,976 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:58:21,976 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:58:21,978 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:58:21,979 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:58:21,979 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:58:21,980 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:58:21,980 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:58:21,981 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:58:21,981 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:58:21,982 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:58:21,983 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:58:21,984 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:58:21,985 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:58:21,985 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:58:21,986 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:58:21,986 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:58:21,987 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:58:21,987 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:58:21,988 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:58:21,989 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:58:21,990 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:58:21,990 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:58:21,990 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:58:21,991 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:58:21,991 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:58:21,991 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:21,992 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:58:21,992 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:58:21,992 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:58:21,993 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:58:21,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:58:21,993 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:58:21,994 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:58:21,994 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:58:21,995 INFO L153 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_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 198a885d453136e0f485e10bae010eb2ed68236b2d57919bf162df9bdad27ee6 [2023-11-19 04:58:22,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:58:22,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:58:22,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:58:22,312 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:58:22,312 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:58:22,314 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/float-benchs/interpolation.c.p+cfa-reducer.c [2023-11-19 04:58:25,442 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:58:25,701 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:58:25,701 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/sv-benchmarks/c/float-benchs/interpolation.c.p+cfa-reducer.c [2023-11-19 04:58:25,711 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/data/7c458da25/56b6562a7bad4f8fa83f8af9b791d057/FLAGbb3e74128 [2023-11-19 04:58:25,729 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/data/7c458da25/56b6562a7bad4f8fa83f8af9b791d057 [2023-11-19 04:58:25,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:58:25,734 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:58:25,735 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:25,736 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:58:25,741 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:58:25,742 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:25" (1/1) ... [2023-11-19 04:58:25,743 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39fd2f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:25, skipping insertion in model container [2023-11-19 04:58:25,743 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:25" (1/1) ... [2023-11-19 04:58:25,772 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:58:25,943 WARN L240 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_3e6f3487-e65f-44d6-90ee-ff42299b99f3/sv-benchmarks/c/float-benchs/interpolation.c.p+cfa-reducer.c[1306,1319] [2023-11-19 04:58:25,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:25,972 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:58:25,995 WARN L240 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_3e6f3487-e65f-44d6-90ee-ff42299b99f3/sv-benchmarks/c/float-benchs/interpolation.c.p+cfa-reducer.c[1306,1319] [2023-11-19 04:58:25,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:26,014 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:58:26,015 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26 WrapperNode [2023-11-19 04:58:26,015 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:26,016 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:26,016 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:58:26,016 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:58:26,024 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,034 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,058 INFO L138 Inliner]: procedures = 18, calls = 33, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 101 [2023-11-19 04:58:26,059 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:26,059 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:58:26,060 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:58:26,060 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:58:26,075 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,075 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,079 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,080 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,089 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,094 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,095 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,096 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,099 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:58:26,100 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:58:26,100 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:58:26,100 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:58:26,101 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:26,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:26,137 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:58:26,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:58:26,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:58:26,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:58:26,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:58:26,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-19 04:58:26,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:58:26,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:58:26,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2023-11-19 04:58:26,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:58:26,250 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:58:26,252 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:58:26,407 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:58:26,428 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:58:26,428 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:58:26,433 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:26 BoogieIcfgContainer [2023-11-19 04:58:26,433 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:58:26,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:58:26,436 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:58:26,440 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:58:26,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:58:25" (1/3) ... [2023-11-19 04:58:26,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3862842d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:26, skipping insertion in model container [2023-11-19 04:58:26,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (2/3) ... [2023-11-19 04:58:26,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3862842d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:26, skipping insertion in model container [2023-11-19 04:58:26,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:26" (3/3) ... [2023-11-19 04:58:26,444 INFO L112 eAbstractionObserver]: Analyzing ICFG interpolation.c.p+cfa-reducer.c [2023-11-19 04:58:26,479 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:58:26,479 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:58:26,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:58:26,539 INFO L357 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=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@213207b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:58:26,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:58:26,544 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 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) [2023-11-19 04:58:26,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:58:26,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:26,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:26,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:26,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:26,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1338621212, now seen corresponding path program 1 times [2023-11-19 04:58:26,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:26,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942395215] [2023-11-19 04:58:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:26,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:26,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:26,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942395215] [2023-11-19 04:58:26,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942395215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:26,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:26,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:58:26,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716499107] [2023-11-19 04:58:26,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:26,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:58:26,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:26,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:58:26,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:58:26,992 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 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 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2023-11-19 04:58:27,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:27,121 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2023-11-19 04:58:27,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:58:27,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 11 [2023-11-19 04:58:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:27,143 INFO L225 Difference]: With dead ends: 40 [2023-11-19 04:58:27,144 INFO L226 Difference]: Without dead ends: 26 [2023-11-19 04:58:27,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:58:27,156 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:27,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 66 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:58:27,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-19 04:58:27,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 15. [2023-11-19 04:58:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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) [2023-11-19 04:58:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2023-11-19 04:58:27,201 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 11 [2023-11-19 04:58:27,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:27,202 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2023-11-19 04:58:27,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2023-11-19 04:58:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2023-11-19 04:58:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:58:27,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:27,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:27,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:58:27,206 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:27,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:27,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1321610551, now seen corresponding path program 1 times [2023-11-19 04:58:27,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:27,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969795894] [2023-11-19 04:58:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:27,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:27,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:27,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969795894] [2023-11-19 04:58:27,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969795894] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:27,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:27,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:58:27,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455983000] [2023-11-19 04:58:27,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:27,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:27,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:27,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:27,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:27,395 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-11-19 04:58:27,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:27,414 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2023-11-19 04:58:27,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:27,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2023-11-19 04:58:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:27,415 INFO L225 Difference]: With dead ends: 33 [2023-11-19 04:58:27,416 INFO L226 Difference]: Without dead ends: 25 [2023-11-19 04:58:27,416 INFO L412 NwaCegarLoop]: 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 [2023-11-19 04:58:27,418 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:27,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:58:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-19 04:58:27,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2023-11-19 04:58:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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) [2023-11-19 04:58:27,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-19 04:58:27,425 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2023-11-19 04:58:27,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:27,425 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-19 04:58:27,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-11-19 04:58:27,426 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-19 04:58:27,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:58:27,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:27,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:27,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:58:27,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:27,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:27,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1139004290, now seen corresponding path program 1 times [2023-11-19 04:58:27,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:27,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733143261] [2023-11-19 04:58:27,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:27,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:58:27,452 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 04:58:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:58:27,490 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-19 04:58:27,490 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 04:58:27,492 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 04:58:27,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:58:27,498 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 04:58:27,503 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 04:58:27,522 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-19 04:58:27,523 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem6 could not be translated [2023-11-19 04:58:27,524 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem7 could not be translated [2023-11-19 04:58:27,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 04:58:27 BoogieIcfgContainer [2023-11-19 04:58:27,536 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 04:58:27,537 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 04:58:27,537 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 04:58:27,537 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 04:58:27,538 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:26" (3/4) ... [2023-11-19 04:58:27,540 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-19 04:58:27,541 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 04:58:27,543 INFO L158 Benchmark]: Toolchain (without parser) took 1808.81ms. Allocated memory was 121.6MB in the beginning and 155.2MB in the end (delta: 33.6MB). Free memory was 79.0MB in the beginning and 87.3MB in the end (delta: -8.3MB). Peak memory consumption was 27.8MB. Max. memory is 16.1GB. [2023-11-19 04:58:27,543 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 121.6MB. Free memory is still 69.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 04:58:27,544 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.84ms. Allocated memory is still 121.6MB. Free memory was 79.0MB in the beginning and 67.8MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-19 04:58:27,544 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.13ms. Allocated memory is still 121.6MB. Free memory was 67.8MB in the beginning and 66.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 04:58:27,545 INFO L158 Benchmark]: Boogie Preprocessor took 39.61ms. Allocated memory is still 121.6MB. Free memory was 66.0MB in the beginning and 64.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 04:58:27,546 INFO L158 Benchmark]: RCFGBuilder took 333.51ms. Allocated memory is still 121.6MB. Free memory was 64.7MB in the beginning and 52.7MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-19 04:58:27,546 INFO L158 Benchmark]: TraceAbstraction took 1099.83ms. Allocated memory was 121.6MB in the beginning and 155.2MB in the end (delta: 33.6MB). Free memory was 52.1MB in the beginning and 87.3MB in the end (delta: -35.3MB). Peak memory consumption was 520.2kB. Max. memory is 16.1GB. [2023-11-19 04:58:27,547 INFO L158 Benchmark]: Witness Printer took 5.05ms. Allocated memory is still 155.2MB. Free memory is still 87.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 04:58:27,550 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 121.6MB. Free memory is still 69.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 279.84ms. Allocated memory is still 121.6MB. Free memory was 79.0MB in the beginning and 67.8MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.13ms. Allocated memory is still 121.6MB. Free memory was 67.8MB in the beginning and 66.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 39.61ms. Allocated memory is still 121.6MB. Free memory was 66.0MB in the beginning and 64.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 333.51ms. Allocated memory is still 121.6MB. Free memory was 64.7MB in the beginning and 52.7MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1099.83ms. Allocated memory was 121.6MB in the beginning and 155.2MB in the end (delta: 33.6MB). Free memory was 52.1MB in the beginning and 87.3MB in the end (delta: -35.3MB). Peak memory consumption was 520.2kB. Max. memory is 16.1GB. * Witness Printer took 5.05ms. Allocated memory is still 155.2MB. Free memory is still 87.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem7 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 51]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 33, overapproximation of someBinaryDOUBLEComparisonOperation at line 38, overapproximation of to_real at line 17, overapproximation of someBinaryArithmeticFLOAToperation at line 36. Possible FailurePath: [L1] int __return_main; [L14] int main__i; [L15] float main__z; [L16] float main__t; [L17] float main__min[5] = { 5, 10, 12, 30, 150 }; [L18] float main__max[5] = { 10, 12, 30, 150, 300 }; [L19] main__t = __VERIFIER_nondet_float() [L20] int main____CPAchecker_TMP_0; [L21] EXPR main__min[0] VAL [__return_main=0, main__max={5:0}, main__min={4:0}] [L21] COND TRUE main__t >= (main__min[0]) [L23] EXPR main__max[4UL] VAL [__return_main=0, main__max={5:0}, main__min={4:0}] [L23] COND TRUE main__t <= (main__max[4UL]) [L25] main____CPAchecker_TMP_0 = 1 VAL [__return_main=0, main____CPAchecker_TMP_0=1, main__max={5:0}, main__min={4:0}] [L27] COND TRUE main____CPAchecker_TMP_0 != 0 [L29] main__i = 0 VAL [__return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={5:0}, main__min={4:0}] [L31] COND TRUE main__i < 5UL [L33] EXPR main__max[main__i] VAL [__return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={5:0}, main__min={4:0}] [L33] COND TRUE main__t <= (main__max[main__i]) [L36] EXPR main__min[main__i] [L36] EXPR main__max[main__i] [L36] EXPR main__min[main__i] [L36] main__z = (main__t - (main__min[main__i])) / ((main__max[main__i]) - (main__min[main__i])) [L37] int main____CPAchecker_TMP_1; VAL [__return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={5:0}, main__min={4:0}] [L38] COND FALSE !(main__z >= 0.0) VAL [__return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={5:0}, main__min={4:0}] [L63] main____CPAchecker_TMP_1 = 0 VAL [__return_main=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={5:0}, main__min={4:0}] [L45] int __tmp_1; [L46] __tmp_1 = main____CPAchecker_TMP_1 [L47] int __VERIFIER_assert__cond; [L48] __VERIFIER_assert__cond = __tmp_1 VAL [__VERIFIER_assert__cond=0, __return_main=0, __tmp_1=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={5:0}, main__min={4:0}] [L49] COND TRUE __VERIFIER_assert__cond == 0 VAL [__VERIFIER_assert__cond=0, __return_main=0, __tmp_1=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={5:0}, main__min={4:0}] [L51] reach_error() VAL [__VERIFIER_assert__cond=0, __return_main=0, __tmp_1=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={5:0}, main__min={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 33 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 33 mSDsluCounter, 96 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 62 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34 IncrementalHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 34 mSDtfsCounter, 34 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 12, 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, 20 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 30 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 [2023-11-19 04:58:27,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/interpolation.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --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 198a885d453136e0f485e10bae010eb2ed68236b2d57919bf162df9bdad27ee6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:58:30,405 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:58:30,552 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-19 04:58:30,562 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:58:30,563 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:58:30,615 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:58:30,616 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:58:30,617 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:58:30,618 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:58:30,623 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:58:30,624 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:58:30,624 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:58:30,625 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:58:30,627 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:58:30,627 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:58:30,628 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:58:30,629 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:58:30,630 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:58:30,630 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:58:30,631 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:58:30,632 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:58:30,632 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:58:30,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:58:30,633 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:58:30,634 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 04:58:30,634 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-19 04:58:30,634 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-19 04:58:30,635 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:58:30,635 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:58:30,636 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:58:30,637 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:58:30,638 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 04:58:30,638 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:58:30,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:30,639 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:58:30,639 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:58:30,639 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:58:30,639 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-19 04:58:30,640 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-19 04:58:30,641 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:58:30,641 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:58:30,642 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:58:30,642 INFO L153 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_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 198a885d453136e0f485e10bae010eb2ed68236b2d57919bf162df9bdad27ee6 [2023-11-19 04:58:31,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:58:31,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:58:31,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:58:31,096 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:58:31,096 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:58:31,098 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/float-benchs/interpolation.c.p+cfa-reducer.c [2023-11-19 04:58:34,513 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:58:34,805 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:58:34,807 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/sv-benchmarks/c/float-benchs/interpolation.c.p+cfa-reducer.c [2023-11-19 04:58:34,818 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/data/5d0540c3e/fc89359bfb2042898d79604917cf99fd/FLAG3dee3c218 [2023-11-19 04:58:34,841 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/data/5d0540c3e/fc89359bfb2042898d79604917cf99fd [2023-11-19 04:58:34,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:58:34,849 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:58:34,854 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:34,855 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:58:34,860 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:58:34,861 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:34" (1/1) ... [2023-11-19 04:58:34,862 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3320a447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:34, skipping insertion in model container [2023-11-19 04:58:34,863 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:34" (1/1) ... [2023-11-19 04:58:34,889 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:58:35,101 WARN L240 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_3e6f3487-e65f-44d6-90ee-ff42299b99f3/sv-benchmarks/c/float-benchs/interpolation.c.p+cfa-reducer.c[1306,1319] [2023-11-19 04:58:35,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:35,129 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:58:35,155 WARN L240 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_3e6f3487-e65f-44d6-90ee-ff42299b99f3/sv-benchmarks/c/float-benchs/interpolation.c.p+cfa-reducer.c[1306,1319] [2023-11-19 04:58:35,158 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:35,176 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:58:35,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:35 WrapperNode [2023-11-19 04:58:35,177 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:35,178 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:35,178 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:58:35,179 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:58:35,187 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:35" (1/1) ... [2023-11-19 04:58:35,207 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:35" (1/1) ... [2023-11-19 04:58:35,230 INFO L138 Inliner]: procedures = 19, calls = 33, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 102 [2023-11-19 04:58:35,231 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:35,232 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:58:35,232 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:58:35,241 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:58:35,249 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:35" (1/1) ... [2023-11-19 04:58:35,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:35" (1/1) ... [2023-11-19 04:58:35,254 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:35" (1/1) ... [2023-11-19 04:58:35,254 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:35" (1/1) ... [2023-11-19 04:58:35,265 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:35" (1/1) ... [2023-11-19 04:58:35,268 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:35" (1/1) ... [2023-11-19 04:58:35,270 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:35" (1/1) ... [2023-11-19 04:58:35,272 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:35" (1/1) ... [2023-11-19 04:58:35,276 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:58:35,277 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:58:35,277 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:58:35,277 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:58:35,278 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:35" (1/1) ... [2023-11-19 04:58:35,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:35,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:35,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:58:35,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:58:35,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:58:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE4 [2023-11-19 04:58:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-19 04:58:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:58:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2023-11-19 04:58:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:58:35,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:58:35,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:58:35,423 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:58:35,426 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:58:38,161 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:58:38,169 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:58:38,169 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:58:38,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:38 BoogieIcfgContainer [2023-11-19 04:58:38,173 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:58:38,176 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:58:38,176 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:58:38,180 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:58:38,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:58:34" (1/3) ... [2023-11-19 04:58:38,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@219caa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:38, skipping insertion in model container [2023-11-19 04:58:38,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:35" (2/3) ... [2023-11-19 04:58:38,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@219caa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:38, skipping insertion in model container [2023-11-19 04:58:38,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:38" (3/3) ... [2023-11-19 04:58:38,184 INFO L112 eAbstractionObserver]: Analyzing ICFG interpolation.c.p+cfa-reducer.c [2023-11-19 04:58:38,204 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:58:38,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:58:38,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:58:38,276 INFO L357 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=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@186e3a02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:58:38,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:58:38,281 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) [2023-11-19 04:58:38,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:58:38,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:38,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:38,289 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:38,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:38,295 INFO L85 PathProgramCache]: Analyzing trace with hash 83921358, now seen corresponding path program 1 times [2023-11-19 04:58:38,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:58:38,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873509414] [2023-11-19 04:58:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:38,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 04:58:38,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:58:38,317 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 04:58:38,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-19 04:58:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:38,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:58:38,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:38,790 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:38,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:58:38,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873509414] [2023-11-19 04:58:38,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873509414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:38,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:38,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:58:38,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038526958] [2023-11-19 04:58:38,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:38,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:38,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:58:38,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:38,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:38,836 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 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:58:40,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:58:42,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:58:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:42,538 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2023-11-19 04:58:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:42,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 04:58:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:42,552 INFO L225 Difference]: With dead ends: 41 [2023-11-19 04:58:42,552 INFO L226 Difference]: Without dead ends: 26 [2023-11-19 04:58:42,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:42,564 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:42,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 41 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2023-11-19 04:58:42,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-19 04:58:42,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2023-11-19 04:58:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 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) [2023-11-19 04:58:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-11-19 04:58:42,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 12 [2023-11-19 04:58:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:42,597 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-11-19 04:58:42,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:58:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-11-19 04:58:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:58:42,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:42,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:42,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-19 04:58:42,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 04:58:42,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:42,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:42,801 INFO L85 PathProgramCache]: Analyzing trace with hash -6868241, now seen corresponding path program 1 times [2023-11-19 04:58:42,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:58:42,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961495860] [2023-11-19 04:58:42,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:42,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 04:58:42,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:58:42,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 04:58:42,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-19 04:58:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:43,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:58:43,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:43,281 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:43,281 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:58:43,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961495860] [2023-11-19 04:58:43,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961495860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:43,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:43,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:58:43,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831140221] [2023-11-19 04:58:43,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:43,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:58:43,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:58:43,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:58:43,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:58:43,308 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2023-11-19 04:58:45,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:58:45,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:45,491 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2023-11-19 04:58:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:58:45,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2023-11-19 04:58:45,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:45,493 INFO L225 Difference]: With dead ends: 21 [2023-11-19 04:58:45,493 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 04:58:45,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:58:45,495 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:45,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 04:58:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 04:58:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-19 04:58:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2023-11-19 04:58:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-19 04:58:45,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 13 [2023-11-19 04:58:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:45,502 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-19 04:58:45,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2023-11-19 04:58:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-19 04:58:45,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:58:45,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:45,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:45,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:45,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 04:58:45,704 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:45,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:45,705 INFO L85 PathProgramCache]: Analyzing trace with hash 10142420, now seen corresponding path program 1 times [2023-11-19 04:58:45,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:58:45,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455510524] [2023-11-19 04:58:45,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:45,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 04:58:45,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:58:45,708 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 04:58:45,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e6f3487-e65f-44d6-90ee-ff42299b99f3/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-19 04:58:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:46,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 04:58:46,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:48,500 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 04:58:48,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 86 [2023-11-19 04:59:25,292 WARN L293 SmtUtils]: Spent 12.10s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)