./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_0832a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_0832a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ccec72d1445b0e5a7d371146f8f1ae3659440ba0ebb02d40d87a31c04bfcf378 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:17:17,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:17:17,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:17:17,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:17:17,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:17:17,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:17:17,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:17:17,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:17:17,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:17:17,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:17:17,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:17:17,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:17:17,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:17:17,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:17:17,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:17:17,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:17:17,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:17:17,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:17:17,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:17:17,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:17:17,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:17:17,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:17:17,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:17:17,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:17:17,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:17:17,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:17:17,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:17:17,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:17:17,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:17:17,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:17:17,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:17:17,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:17:17,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:17:17,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:17:17,760 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:17:17,760 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:17:17,761 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:17:17,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:17:17,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:17:17,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:17:17,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:17:17,764 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:17:17,814 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:17:17,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:17:17,817 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:17:17,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:17:17,818 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:17:17,818 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:17:17,818 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:17:17,819 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:17:17,819 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:17:17,819 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:17:17,820 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:17:17,820 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:17:17,821 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:17:17,821 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:17:17,821 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:17:17,821 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:17:17,822 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:17:17,822 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:17:17,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:17:17,823 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:17:17,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:17:17,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:17:17,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:17:17,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:17:17,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:17:17,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:17:17,832 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:17:17,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:17:17,832 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:17:17,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:17:17,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:17:17,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:17:17,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:17:17,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:17:17,834 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:17:17,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:17:17,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:17:17,835 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:17:17,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:17:17,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:17:17,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:17:17,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ccec72d1445b0e5a7d371146f8f1ae3659440ba0ebb02d40d87a31c04bfcf378 [2022-10-17 17:17:18,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:17:18,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:17:18,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:17:18,280 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:17:18,281 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:17:18,282 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/float-newlib/float_req_bl_0832a.c [2022-10-17 17:17:18,352 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/data/945eec801/7f37157f14f84325b485070fa0a18b2c/FLAG42f564e35 [2022-10-17 17:17:18,868 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:17:18,872 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/sv-benchmarks/c/float-newlib/float_req_bl_0832a.c [2022-10-17 17:17:18,882 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/data/945eec801/7f37157f14f84325b485070fa0a18b2c/FLAG42f564e35 [2022-10-17 17:17:19,205 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/data/945eec801/7f37157f14f84325b485070fa0a18b2c [2022-10-17 17:17:19,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:17:19,213 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:17:19,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:17:19,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:17:19,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:17:19,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:17:19" (1/1) ... [2022-10-17 17:17:19,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@496d2b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:19, skipping insertion in model container [2022-10-17 17:17:19,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:17:19" (1/1) ... [2022-10-17 17:17:19,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:17:19,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:17:19,501 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/sv-benchmarks/c/float-newlib/float_req_bl_0832a.c[3180,3193] [2022-10-17 17:17:19,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:17:19,519 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:17:19,585 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/sv-benchmarks/c/float-newlib/float_req_bl_0832a.c[3180,3193] [2022-10-17 17:17:19,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:17:19,609 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:17:19,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:19 WrapperNode [2022-10-17 17:17:19,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:17:19,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:17:19,611 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:17:19,611 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:17:19,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:19" (1/1) ... [2022-10-17 17:17:19,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:19" (1/1) ... [2022-10-17 17:17:19,660 INFO L138 Inliner]: procedures = 18, calls = 42, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 184 [2022-10-17 17:17:19,668 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:17:19,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:17:19,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:17:19,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:17:19,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:19" (1/1) ... [2022-10-17 17:17:19,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:19" (1/1) ... [2022-10-17 17:17:19,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:19" (1/1) ... [2022-10-17 17:17:19,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:19" (1/1) ... [2022-10-17 17:17:19,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:19" (1/1) ... [2022-10-17 17:17:19,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:19" (1/1) ... [2022-10-17 17:17:19,735 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:19" (1/1) ... [2022-10-17 17:17:19,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:19" (1/1) ... [2022-10-17 17:17:19,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:17:19,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:17:19,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:17:19,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:17:19,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:19" (1/1) ... [2022-10-17 17:17:19,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:17:19,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:17:19,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:17:19,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:17:19,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:17:19,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:17:19,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:17:19,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:17:19,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-10-17 17:17:19,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-10-17 17:17:19,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:17:19,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:17:19,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:17:19,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2022-10-17 17:17:19,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:17:19,926 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:17:19,928 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:17:20,453 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:17:20,539 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:17:20,540 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-10-17 17:17:20,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:17:20 BoogieIcfgContainer [2022-10-17 17:17:20,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:17:20,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:17:20,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:17:20,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:17:20,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:17:19" (1/3) ... [2022-10-17 17:17:20,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dbae1e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:17:20, skipping insertion in model container [2022-10-17 17:17:20,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:19" (2/3) ... [2022-10-17 17:17:20,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dbae1e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:17:20, skipping insertion in model container [2022-10-17 17:17:20,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:17:20" (3/3) ... [2022-10-17 17:17:20,562 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_0832a.c [2022-10-17 17:17:20,587 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:17:20,587 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:17:20,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:17:20,681 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5bfb20a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:17:20,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:17:20,686 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.75) internal successors, (49), 29 states have internal predecessors, (49), 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) [2022-10-17 17:17:20,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 17:17:20,693 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:20,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:20,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:20,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:20,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1363482361, now seen corresponding path program 1 times [2022-10-17 17:17:20,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:20,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908419442] [2022-10-17 17:17:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:20,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:17:21,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:21,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908419442] [2022-10-17 17:17:21,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908419442] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:21,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:21,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:17:21,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049411373] [2022-10-17 17:17:21,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:21,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:17:21,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:21,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:17:21,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:17:21,065 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.75) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-10-17 17:17:21,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:21,099 INFO L93 Difference]: Finished difference Result 59 states and 97 transitions. [2022-10-17 17:17:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:17:21,102 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-10-17 17:17:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:21,111 INFO L225 Difference]: With dead ends: 59 [2022-10-17 17:17:21,112 INFO L226 Difference]: Without dead ends: 28 [2022-10-17 17:17:21,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:17:21,119 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:21,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:17:21,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-17 17:17:21,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-10-17 17:17:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 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) [2022-10-17 17:17:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2022-10-17 17:17:21,157 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 7 [2022-10-17 17:17:21,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:21,157 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2022-10-17 17:17:21,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-10-17 17:17:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2022-10-17 17:17:21,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:17:21,159 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:21,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:21,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:17:21,160 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:21,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:21,161 INFO L85 PathProgramCache]: Analyzing trace with hash 678113952, now seen corresponding path program 1 times [2022-10-17 17:17:21,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:21,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083442109] [2022-10-17 17:17:21,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:21,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:17:21,221 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 17:17:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:17:21,305 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-10-17 17:17:21,306 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 17:17:21,308 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 17:17:21,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:17:21,314 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-17 17:17:21,317 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 17:17:21,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 05:17:21 BoogieIcfgContainer [2022-10-17 17:17:21,350 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 17:17:21,351 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 17:17:21,351 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 17:17:21,351 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 17:17:21,352 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:17:20" (3/4) ... [2022-10-17 17:17:21,355 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-10-17 17:17:21,355 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 17:17:21,356 INFO L158 Benchmark]: Toolchain (without parser) took 2142.90ms. Allocated memory is still 94.4MB. Free memory was 53.0MB in the beginning and 45.8MB in the end (delta: 7.2MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. [2022-10-17 17:17:21,356 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 94.4MB. Free memory was 69.0MB in the beginning and 68.9MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:17:21,357 INFO L158 Benchmark]: CACSL2BoogieTranslator took 395.20ms. Allocated memory is still 94.4MB. Free memory was 52.7MB in the beginning and 67.5MB in the end (delta: -14.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-10-17 17:17:21,358 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.50ms. Allocated memory is still 94.4MB. Free memory was 67.5MB in the beginning and 65.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 17:17:21,358 INFO L158 Benchmark]: Boogie Preprocessor took 79.68ms. Allocated memory is still 94.4MB. Free memory was 65.4MB in the beginning and 63.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 17:17:21,359 INFO L158 Benchmark]: RCFGBuilder took 799.37ms. Allocated memory is still 94.4MB. Free memory was 63.6MB in the beginning and 41.0MB in the end (delta: 22.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-10-17 17:17:21,360 INFO L158 Benchmark]: TraceAbstraction took 799.03ms. Allocated memory is still 94.4MB. Free memory was 40.2MB in the beginning and 45.8MB in the end (delta: -5.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:17:21,360 INFO L158 Benchmark]: Witness Printer took 4.49ms. Allocated memory is still 94.4MB. Free memory is still 45.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:17:21,364 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 94.4MB. Free memory was 69.0MB in the beginning and 68.9MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 395.20ms. Allocated memory is still 94.4MB. Free memory was 52.7MB in the beginning and 67.5MB in the end (delta: -14.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.50ms. Allocated memory is still 94.4MB. Free memory was 67.5MB in the beginning and 65.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 79.68ms. Allocated memory is still 94.4MB. Free memory was 65.4MB in the beginning and 63.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 799.37ms. Allocated memory is still 94.4MB. Free memory was 63.6MB in the beginning and 41.0MB in the end (delta: 22.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 799.03ms. Allocated memory is still 94.4MB. Free memory was 40.2MB in the beginning and 45.8MB in the end (delta: -5.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.49ms. Allocated memory is still 94.4MB. Free memory is still 45.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 124]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 123, overapproximation of someUnaryDOUBLEoperation at line 21, overapproximation of someBinaryArithmeticFLOAToperation at line 52. Possible FailurePath: [L17-L36] static const float one_exp = 1.0, halF_exp[2] = { 0.5, -0.5, }, huge_exp = 1.0e+30, twom100_exp = 7.8886090522e-31, ln2HI_exp[2] = { 6.9313812256e-01, -6.9313812256e-01, }, ln2LO_exp[2] = { 9.0580006145e-06, -9.0580006145e-06, }, invln2_exp = 1.4426950216e+00, P1_exp = 1.6666667163e-01, P2_exp = -2.7777778450e-03, P3_exp = 6.6137559770e-05, P4_exp = -1.6533901999e-06, P5_exp = 4.1381369442e-08; [L119] float x = 0.0f; [L120] CALL, EXPR __ieee754_expf(x) [L39] float y, hi, lo, c, t; [L40] __int32_t k = 0, xsb, sx; [L41] __uint32_t hx; VAL [\old(x)=0, halF_exp={4:0}, huge_exp=1000000000000000000000000000000, invln2_exp=1803368777/1250000000, k=0, ln2HI_exp={5:0}, ln2LO_exp={6:0}, one_exp=1, P1_exp=16666667163/100000000000, P3_exp=6613755977/100000000000000, P5_exp=20690684721/500000000000000000, twom100_exp=39443045261/50000000000000000000000000000000000000000, x=0] [L44] ieee_float_shape_type gf_u; [L45] gf_u.value = (x) [L46] EXPR gf_u.word [L46] (sx) = gf_u.word [L48] xsb = (sx >> 31) & 1 [L49] hx = sx & 0x7fffffff VAL [\old(x)=0, halF_exp={4:0}, huge_exp=1000000000000000000000000000000, hx=2139095041, hx = sx & 0x7fffffff=2147483647, invln2_exp=1803368777/1250000000, k=0, ln2HI_exp={5:0}, ln2LO_exp={6:0}, one_exp=1, P1_exp=16666667163/100000000000, P3_exp=6613755977/100000000000000, P5_exp=20690684721/500000000000000000, sx=2147483647, twom100_exp=39443045261/50000000000000000000000000000000000000000, x=0, xsb=0, xsb = (sx >> 31) & 1=1000000000000000000000000000003xsb = (sx >> 31) & 1=1000000000000000000000000000002] [L51] COND TRUE ((hx) > 0x7f800000L) [L52] return x + x; VAL [\old(x)=0, halF_exp={4:0}, huge_exp=1000000000000000000000000000000, hx=2139095041, hx = sx & 0x7fffffff=2147483647, invln2_exp=1803368777/1250000000, k=0, ln2HI_exp={5:0}, ln2LO_exp={6:0}, one_exp=1, P1_exp=16666667163/100000000000, P3_exp=6613755977/100000000000000, P5_exp=20690684721/500000000000000000, sx=2147483647, twom100_exp=39443045261/50000000000000000000000000000000000000000, x=0, xsb=0, xsb = (sx >> 31) & 1=1000000000000000000000000000003xsb = (sx >> 31) & 1=1000000000000000000000000000002] [L120] RET, EXPR __ieee754_expf(x) [L120] float res = __ieee754_expf(x); [L123] COND TRUE res != 1.0f VAL [halF_exp={4:0}, huge_exp=1000000000000000000000000000000, hx = sx & 0x7fffffff=2147483647, invln2_exp=1803368777/1250000000, ln2HI_exp={5:0}, ln2LO_exp={6:0}, one_exp=1, P1_exp=16666667163/100000000000, P3_exp=6613755977/100000000000000, P5_exp=20690684721/500000000000000000, res=1000000000000000000000000000001, twom100_exp=39443045261/50000000000000000000000000000000000000000, x=0, xsb = (sx >> 31) & 1=1000000000000000000000000000002] [L124] reach_error() VAL [halF_exp={4:0}, huge_exp=1000000000000000000000000000000, hx = sx & 0x7fffffff=2147483647, invln2_exp=1803368777/1250000000, ln2HI_exp={5:0}, ln2LO_exp={6:0}, one_exp=1, P1_exp=16666667163/100000000000, P3_exp=6613755977/100000000000000, P5_exp=20690684721/500000000000000000, res=1000000000000000000000000000001, twom100_exp=39443045261/50000000000000000000000000000000000000000, x=0, xsb = (sx >> 31) & 1=1000000000000000000000000000002] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 33 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 33 mSDtfsCounter, 5 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, InterpolantAutomatonStates: 2, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 [2022-10-17 17:17:21,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_0832a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ccec72d1445b0e5a7d371146f8f1ae3659440ba0ebb02d40d87a31c04bfcf378 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:17:23,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:17:23,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:17:23,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:17:23,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:17:23,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:17:23,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:17:23,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:17:23,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:17:23,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:17:23,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:17:23,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:17:23,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:17:23,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:17:24,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:17:24,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:17:24,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:17:24,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:17:24,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:17:24,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:17:24,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:17:24,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:17:24,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:17:24,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:17:24,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:17:24,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:17:24,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:17:24,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:17:24,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:17:24,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:17:24,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:17:24,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:17:24,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:17:24,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:17:24,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:17:24,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:17:24,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:17:24,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:17:24,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:17:24,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:17:24,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:17:24,052 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-10-17 17:17:24,099 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:17:24,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:17:24,101 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:17:24,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:17:24,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:17:24,103 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:17:24,103 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:17:24,103 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:17:24,104 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:17:24,104 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:17:24,105 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:17:24,105 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:17:24,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:17:24,107 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:17:24,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:17:24,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:17:24,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:17:24,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:17:24,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:17:24,108 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 17:17:24,109 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-10-17 17:17:24,109 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-10-17 17:17:24,109 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:17:24,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:17:24,110 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:17:24,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:17:24,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:17:24,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 17:17:24,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:17:24,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:17:24,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:17:24,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:17:24,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:17:24,112 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-10-17 17:17:24,112 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-10-17 17:17:24,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:17:24,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:17:24,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-10-17 17:17:24,113 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ccec72d1445b0e5a7d371146f8f1ae3659440ba0ebb02d40d87a31c04bfcf378 [2022-10-17 17:17:24,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:17:24,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:17:24,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:17:24,558 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:17:24,559 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:17:24,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/float-newlib/float_req_bl_0832a.c [2022-10-17 17:17:24,638 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/data/919d3d7f8/02bc2829869542158c5745b0ec3b7c08/FLAG32f2b7ffc [2022-10-17 17:17:25,187 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:17:25,188 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/sv-benchmarks/c/float-newlib/float_req_bl_0832a.c [2022-10-17 17:17:25,195 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/data/919d3d7f8/02bc2829869542158c5745b0ec3b7c08/FLAG32f2b7ffc [2022-10-17 17:17:25,559 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/data/919d3d7f8/02bc2829869542158c5745b0ec3b7c08 [2022-10-17 17:17:25,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:17:25,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:17:25,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:17:25,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:17:25,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:17:25,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:17:25" (1/1) ... [2022-10-17 17:17:25,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347300bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:25, skipping insertion in model container [2022-10-17 17:17:25,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:17:25" (1/1) ... [2022-10-17 17:17:25,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:17:25,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:17:25,804 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/sv-benchmarks/c/float-newlib/float_req_bl_0832a.c[3180,3193] [2022-10-17 17:17:25,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:17:25,860 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:17:25,906 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/sv-benchmarks/c/float-newlib/float_req_bl_0832a.c[3180,3193] [2022-10-17 17:17:25,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:17:25,925 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:17:25,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:25 WrapperNode [2022-10-17 17:17:25,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:17:25,927 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:17:25,927 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:17:25,927 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:17:25,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:25" (1/1) ... [2022-10-17 17:17:25,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:25" (1/1) ... [2022-10-17 17:17:25,974 INFO L138 Inliner]: procedures = 21, calls = 42, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 162 [2022-10-17 17:17:25,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:17:25,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:17:25,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:17:25,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:17:25,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:25" (1/1) ... [2022-10-17 17:17:25,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:25" (1/1) ... [2022-10-17 17:17:25,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:25" (1/1) ... [2022-10-17 17:17:25,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:25" (1/1) ... [2022-10-17 17:17:26,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:25" (1/1) ... [2022-10-17 17:17:26,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:25" (1/1) ... [2022-10-17 17:17:26,012 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:25" (1/1) ... [2022-10-17 17:17:26,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:25" (1/1) ... [2022-10-17 17:17:26,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:17:26,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:17:26,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:17:26,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:17:26,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:25" (1/1) ... [2022-10-17 17:17:26,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:17:26,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:17:26,075 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:17:26,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:17:26,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:17:26,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE4 [2022-10-17 17:17:26,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-10-17 17:17:26,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:17:26,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2022-10-17 17:17:26,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-10-17 17:17:26,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:17:26,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:17:26,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2022-10-17 17:17:26,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-10-17 17:17:26,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:17:26,244 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:17:26,246 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:17:35,794 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:17:35,800 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:17:35,800 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-10-17 17:17:35,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:17:35 BoogieIcfgContainer [2022-10-17 17:17:35,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:17:35,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:17:35,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:17:35,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:17:35,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:17:25" (1/3) ... [2022-10-17 17:17:35,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd5a686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:17:35, skipping insertion in model container [2022-10-17 17:17:35,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:25" (2/3) ... [2022-10-17 17:17:35,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd5a686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:17:35, skipping insertion in model container [2022-10-17 17:17:35,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:17:35" (3/3) ... [2022-10-17 17:17:35,817 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_0832a.c [2022-10-17 17:17:35,833 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:17:35,833 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:17:35,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:17:35,890 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4001f271, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:17:35,890 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:17:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 35 states have internal predecessors, (57), 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) [2022-10-17 17:17:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:17:35,901 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:35,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:35,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:35,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash 354246130, now seen corresponding path program 1 times [2022-10-17 17:17:35,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:17:35,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918763186] [2022-10-17 17:17:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:35,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:17:35,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:17:35,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:17:35,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-10-17 17:17:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:36,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-17 17:17:36,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:17:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:17:36,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:17:36,465 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:17:36,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918763186] [2022-10-17 17:17:36,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918763186] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:36,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:36,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:17:36,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296922443] [2022-10-17 17:17:36,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:36,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:17:36,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:17:36,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:17:36,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:17:36,517 INFO L87 Difference]: Start difference. First operand has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:17:36,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:36,544 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2022-10-17 17:17:36,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:17:36,547 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-17 17:17:36,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:36,558 INFO L225 Difference]: With dead ends: 70 [2022-10-17 17:17:36,558 INFO L226 Difference]: Without dead ends: 33 [2022-10-17 17:17:36,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:17:36,567 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:36,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:17:36,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-10-17 17:17:36,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-10-17 17:17:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 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) [2022-10-17 17:17:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-10-17 17:17:36,622 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 8 [2022-10-17 17:17:36,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:36,622 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-10-17 17:17:36,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:17:36,623 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-10-17 17:17:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:17:36,624 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:36,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:36,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:17:36,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:17:36,846 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:36,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:36,847 INFO L85 PathProgramCache]: Analyzing trace with hash 325000437, now seen corresponding path program 1 times [2022-10-17 17:17:36,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:17:36,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267323851] [2022-10-17 17:17:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:36,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:17:36,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:17:36,851 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:17:36,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-10-17 17:17:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:37,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 17:17:37,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:17:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:17:37,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:17:37,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:17:37,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267323851] [2022-10-17 17:17:37,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267323851] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:37,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:37,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:17:37,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295007294] [2022-10-17 17:17:37,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:37,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:17:37,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:17:37,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:17:37,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:17:37,568 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-10-17 17:17:40,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:17:42,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:17:44,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:17:46,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:17:46,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:46,437 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-10-17 17:17:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:17:46,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2022-10-17 17:17:46,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:46,514 INFO L225 Difference]: With dead ends: 37 [2022-10-17 17:17:46,514 INFO L226 Difference]: Without dead ends: 33 [2022-10-17 17:17:46,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:17:46,516 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:46,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 128 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 3 Unknown, 13 Unchecked, 8.8s Time] [2022-10-17 17:17:46,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-10-17 17:17:46,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-10-17 17:17:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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) [2022-10-17 17:17:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-10-17 17:17:46,522 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 9 [2022-10-17 17:17:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:46,523 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-10-17 17:17:46,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-10-17 17:17:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-10-17 17:17:46,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:17:46,523 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:46,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:46,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:17:46,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:17:46,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:46,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:46,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1239545392, now seen corresponding path program 1 times [2022-10-17 17:17:46,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:17:46,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329815831] [2022-10-17 17:17:46,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:46,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:17:46,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:17:46,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:17:46,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-10-17 17:17:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:47,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:17:47,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:17:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:17:47,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:17:47,402 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:17:47,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329815831] [2022-10-17 17:17:47,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329815831] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:47,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:47,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:17:47,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370227738] [2022-10-17 17:17:47,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:47,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:17:47,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:17:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:17:47,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:17:47,408 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-10-17 17:17:49,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:17:51,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:17:53,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:17:56,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:17:58,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:17:58,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:58,469 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2022-10-17 17:17:58,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:17:58,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-10-17 17:17:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:58,530 INFO L225 Difference]: With dead ends: 46 [2022-10-17 17:17:58,530 INFO L226 Difference]: Without dead ends: 42 [2022-10-17 17:17:58,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:17:58,532 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 41 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:58,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 62 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 4 Unknown, 0 Unchecked, 11.0s Time] [2022-10-17 17:17:58,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-10-17 17:17:58,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2022-10-17 17:17:58,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 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) [2022-10-17 17:17:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-10-17 17:17:58,538 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 11 [2022-10-17 17:17:58,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:58,539 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-10-17 17:17:58,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-10-17 17:17:58,539 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-10-17 17:17:58,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 17:17:58,539 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:58,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:58,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:17:58,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:17:58,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:58,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:58,752 INFO L85 PathProgramCache]: Analyzing trace with hash -40038256, now seen corresponding path program 1 times [2022-10-17 17:17:58,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:17:58,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388607576] [2022-10-17 17:17:58,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:58,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:17:58,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:17:58,756 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:17:58,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47fc49dd-f44f-4e9d-b9bf-6b2cf2721b87/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-10-17 17:17:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:59,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 17:17:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:17:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:17:59,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:17:59,536 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:17:59,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388607576] [2022-10-17 17:17:59,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388607576] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:59,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:59,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:17:59,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783672389] [2022-10-17 17:17:59,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:59,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:17:59,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:17:59,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:17:59,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:17:59,539 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-10-17 17:18:01,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []