./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-88.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-88.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bc4858d1901c3c90630688f631857e35419d28ea39c5c3a06b704467149a98bd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:20:47,737 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:20:47,818 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:20:47,822 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:20:47,823 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:20:47,861 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:20:47,862 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:20:47,862 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:20:47,863 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:20:47,863 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:20:47,864 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:20:47,864 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:20:47,865 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:20:47,865 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:20:47,866 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:20:47,866 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:20:47,867 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:20:47,867 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:20:47,868 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:20:47,868 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:20:47,869 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:20:47,869 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:20:47,870 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:20:47,870 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:20:47,871 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:20:47,871 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:20:47,872 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:20:47,872 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:20:47,872 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:20:47,873 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:20:47,873 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:20:47,873 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:20:47,874 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:20:47,874 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:20:47,874 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:20:47,874 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:20:47,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:20:47,884 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:20:47,884 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:20:47,885 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:20:47,885 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:20:47,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:20:47,885 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:20:47,886 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:20:47,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:20:47,886 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc4858d1901c3c90630688f631857e35419d28ea39c5c3a06b704467149a98bd [2023-11-19 05:20:48,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:20:48,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:20:48,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:20:48,207 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:20:48,208 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:20:48,210 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-88.i [2023-11-19 05:20:51,175 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:20:51,489 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:20:51,489 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-88.i [2023-11-19 05:20:51,500 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/data/138c13a3b/44385fff447743d1bc6f23308012582f/FLAG0e31848d6 [2023-11-19 05:20:51,519 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/data/138c13a3b/44385fff447743d1bc6f23308012582f [2023-11-19 05:20:51,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:20:51,528 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:20:51,530 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:20:51,530 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:20:51,536 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:20:51,539 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:20:51" (1/1) ... [2023-11-19 05:20:51,540 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@751eb6d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:51, skipping insertion in model container [2023-11-19 05:20:51,540 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:20:51" (1/1) ... [2023-11-19 05:20:51,577 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:20:51,755 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-88.i[915,928] [2023-11-19 05:20:51,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:20:51,806 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:20:51,819 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-88.i[915,928] [2023-11-19 05:20:51,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:20:51,854 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:20:51,855 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:51 WrapperNode [2023-11-19 05:20:51,855 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:20:51,857 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:20:51,857 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:20:51,857 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:20:51,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:51" (1/1) ... [2023-11-19 05:20:51,873 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:51" (1/1) ... [2023-11-19 05:20:51,905 INFO L138 Inliner]: procedures = 26, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 106 [2023-11-19 05:20:51,905 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:20:51,906 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:20:51,907 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:20:51,907 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:20:51,916 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:51" (1/1) ... [2023-11-19 05:20:51,917 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:51" (1/1) ... [2023-11-19 05:20:51,920 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:51" (1/1) ... [2023-11-19 05:20:51,920 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:51" (1/1) ... [2023-11-19 05:20:51,927 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:51" (1/1) ... [2023-11-19 05:20:51,931 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:51" (1/1) ... [2023-11-19 05:20:51,933 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:51" (1/1) ... [2023-11-19 05:20:51,934 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:51" (1/1) ... [2023-11-19 05:20:51,937 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:20:51,938 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:20:51,939 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:20:51,939 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:20:51,940 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:51" (1/1) ... [2023-11-19 05:20:51,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:20:51,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:20:51,971 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:20:51,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:20:52,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:20:52,008 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:20:52,008 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:20:52,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:20:52,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:20:52,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:20:52,084 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:20:52,086 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:20:52,407 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:20:52,571 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:20:52,571 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:20:52,576 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:20:52 BoogieIcfgContainer [2023-11-19 05:20:52,576 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:20:52,579 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:20:52,579 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:20:52,582 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:20:52,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:20:51" (1/3) ... [2023-11-19 05:20:52,583 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548e5acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:20:52, skipping insertion in model container [2023-11-19 05:20:52,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:51" (2/3) ... [2023-11-19 05:20:52,584 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548e5acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:20:52, skipping insertion in model container [2023-11-19 05:20:52,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:20:52" (3/3) ... [2023-11-19 05:20:52,585 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_25-while_file-88.i [2023-11-19 05:20:52,608 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:20:52,608 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:20:52,649 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:20:52,655 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@798601ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:20:52,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:20:52,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 05:20:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 05:20:52,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:52,669 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:52,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:52,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:52,675 INFO L85 PathProgramCache]: Analyzing trace with hash 511409613, now seen corresponding path program 1 times [2023-11-19 05:20:52,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:52,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13752909] [2023-11-19 05:20:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:52,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 05:20:53,060 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 05:20:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 05:20:53,196 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-19 05:20:53,198 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 05:20:53,199 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 05:20:53,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:20:53,206 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-19 05:20:53,210 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 05:20:53,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 05:20:53 BoogieIcfgContainer [2023-11-19 05:20:53,278 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 05:20:53,281 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 05:20:53,281 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 05:20:53,281 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 05:20:53,282 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:20:52" (3/4) ... [2023-11-19 05:20:53,288 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-19 05:20:53,289 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 05:20:53,290 INFO L158 Benchmark]: Toolchain (without parser) took 1762.29ms. Allocated memory is still 155.2MB. Free memory was 124.9MB in the beginning and 68.3MB in the end (delta: 56.6MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. [2023-11-19 05:20:53,290 INFO L158 Benchmark]: CDTParser took 1.02ms. Allocated memory is still 125.8MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 05:20:53,292 INFO L158 Benchmark]: CACSL2BoogieTranslator took 325.30ms. Allocated memory is still 155.2MB. Free memory was 124.2MB in the beginning and 113.1MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 05:20:53,293 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.90ms. Allocated memory is still 155.2MB. Free memory was 112.4MB in the beginning and 111.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 05:20:53,294 INFO L158 Benchmark]: Boogie Preprocessor took 31.41ms. Allocated memory is still 155.2MB. Free memory was 110.3MB in the beginning and 109.5MB in the end (delta: 762.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 05:20:53,299 INFO L158 Benchmark]: RCFGBuilder took 637.69ms. Allocated memory is still 155.2MB. Free memory was 108.9MB in the beginning and 103.9MB in the end (delta: 4.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-19 05:20:53,300 INFO L158 Benchmark]: TraceAbstraction took 699.85ms. Allocated memory is still 155.2MB. Free memory was 103.2MB in the beginning and 68.9MB in the end (delta: 34.3MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2023-11-19 05:20:53,301 INFO L158 Benchmark]: Witness Printer took 8.26ms. Allocated memory is still 155.2MB. Free memory was 68.9MB in the beginning and 68.3MB in the end (delta: 658.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 05:20:53,309 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.02ms. Allocated memory is still 125.8MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 325.30ms. Allocated memory is still 155.2MB. Free memory was 124.2MB in the beginning and 113.1MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.90ms. Allocated memory is still 155.2MB. Free memory was 112.4MB in the beginning and 111.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.41ms. Allocated memory is still 155.2MB. Free memory was 110.3MB in the beginning and 109.5MB in the end (delta: 762.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 637.69ms. Allocated memory is still 155.2MB. Free memory was 108.9MB in the beginning and 103.9MB in the end (delta: 4.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 699.85ms. Allocated memory is still 155.2MB. Free memory was 103.2MB in the beginning and 68.9MB in the end (delta: 34.3MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Witness Printer took 8.26ms. Allocated memory is still 155.2MB. Free memory was 68.9MB in the beginning and 68.3MB in the end (delta: 658.9kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 40, overapproximation of bitwiseOr at line 44. Possible FailurePath: [L21] unsigned char isInitial = 0; [L22] signed char var_1_1 = -8; [L23] signed char var_1_10 = -64; [L24] unsigned char var_1_11 = 0; [L25] unsigned char var_1_12 = 0; [L26] unsigned char var_1_13 = 1; [L27] unsigned char var_1_14 = 0; [L28] unsigned char var_1_15 = 0; [L29] signed long int var_1_16 = -16; [L30] float var_1_17 = 3.5; [L31] float var_1_18 = 128.45; [L32] unsigned long int var_1_19 = 50; [L33] unsigned long int var_1_20 = 25; [L84] isInitial = 1 [L85] FCALL initially() [L86] COND TRUE 1 [L87] FCALL updateLastVariables() [L88] CALL updateVariables() [L59] var_1_10 = __VERIFIER_nondet_char() [L60] CALL assume_abort_if_not(var_1_10 >= -127) VAL [\old(cond)=1, isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=0, var_1_15=0, var_1_16=-16, var_1_17=7/2, var_1_18=2569/20, var_1_19=50, var_1_1=-8, var_1_20=25] [L20] COND FALSE !(!cond) [L60] RET assume_abort_if_not(var_1_10 >= -127) VAL [isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=0, var_1_15=0, var_1_16=-16, var_1_17=7/2, var_1_18=2569/20, var_1_19=50, var_1_1=-8, var_1_20=25] [L61] CALL assume_abort_if_not(var_1_10 <= 126) VAL [\old(cond)=1, isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=0, var_1_15=0, var_1_16=-16, var_1_17=7/2, var_1_18=2569/20, var_1_19=50, var_1_1=-8, var_1_20=25] [L20] COND FALSE !(!cond) [L61] RET assume_abort_if_not(var_1_10 <= 126) VAL [isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=0, var_1_15=0, var_1_16=-16, var_1_17=7/2, var_1_18=2569/20, var_1_19=50, var_1_1=-8, var_1_20=25] [L62] var_1_12 = __VERIFIER_nondet_uchar() [L63] CALL assume_abort_if_not(var_1_12 >= 0) VAL [\old(cond)=1, isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=0, var_1_15=0, var_1_16=-16, var_1_17=7/2, var_1_18=2569/20, var_1_19=50, var_1_1=-8, var_1_20=25] [L20] COND FALSE !(!cond) [L63] RET assume_abort_if_not(var_1_12 >= 0) VAL [isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=0, var_1_15=0, var_1_16=-16, var_1_17=7/2, var_1_18=2569/20, var_1_19=50, var_1_1=-8, var_1_20=25] [L64] CALL assume_abort_if_not(var_1_12 <= 0) VAL [\old(cond)=1, isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=0, var_1_15=0, var_1_16=-16, var_1_17=7/2, var_1_18=2569/20, var_1_19=50, var_1_1=-8, var_1_20=25] [L20] COND FALSE !(!cond) [L64] RET assume_abort_if_not(var_1_12 <= 0) VAL [isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=0, var_1_15=0, var_1_16=-16, var_1_17=7/2, var_1_18=2569/20, var_1_19=50, var_1_1=-8, var_1_20=25] [L65] var_1_14 = __VERIFIER_nondet_uchar() [L66] CALL assume_abort_if_not(var_1_14 >= 1) VAL [\old(cond)=1, isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=1, var_1_15=0, var_1_16=-16, var_1_17=7/2, var_1_18=2569/20, var_1_19=50, var_1_1=-8, var_1_20=25] [L20] COND FALSE !(!cond) [L66] RET assume_abort_if_not(var_1_14 >= 1) VAL [isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=1, var_1_15=0, var_1_16=-16, var_1_17=7/2, var_1_18=2569/20, var_1_19=50, var_1_1=-8, var_1_20=25] [L67] CALL assume_abort_if_not(var_1_14 <= 1) VAL [\old(cond)=1, isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=1, var_1_15=0, var_1_16=-16, var_1_17=7/2, var_1_18=2569/20, var_1_19=50, var_1_1=-8, var_1_20=25] [L20] COND FALSE !(!cond) [L67] RET assume_abort_if_not(var_1_14 <= 1) VAL [isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=1, var_1_15=0, var_1_16=-16, var_1_17=7/2, var_1_18=2569/20, var_1_19=50, var_1_1=-8, var_1_20=25] [L68] var_1_15 = __VERIFIER_nondet_uchar() [L69] CALL assume_abort_if_not(var_1_15 >= 1) VAL [\old(cond)=1, isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=1, var_1_15=1, var_1_16=-16, var_1_17=7/2, var_1_18=2569/20, var_1_19=50, var_1_1=-8, var_1_20=25] [L20] COND FALSE !(!cond) [L69] RET assume_abort_if_not(var_1_15 >= 1) VAL [isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=1, var_1_15=1, var_1_16=-16, var_1_17=7/2, var_1_18=2569/20, var_1_19=50, var_1_1=-8, var_1_20=25] [L70] CALL assume_abort_if_not(var_1_15 <= 1) VAL [\old(cond)=1, isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=1, var_1_15=1, var_1_16=-16, var_1_17=7/2, var_1_18=2569/20, var_1_19=50, var_1_1=-8, var_1_20=25] [L20] COND FALSE !(!cond) [L70] RET assume_abort_if_not(var_1_15 <= 1) VAL [isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=1, var_1_15=1, var_1_16=-16, var_1_17=7/2, var_1_18=2569/20, var_1_19=50, var_1_1=-8, var_1_20=25] [L71] var_1_18 = __VERIFIER_nondet_float() [L72] CALL assume_abort_if_not((var_1_18 >= -922337.2036854765600e+13F && var_1_18 <= -1.0e-20F) || (var_1_18 <= 9223372.036854765600e+12F && var_1_18 >= 1.0e-20F )) VAL [\old(cond)=1, isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=1, var_1_15=1, var_1_16=-16, var_1_17=7/2, var_1_18=518, var_1_19=50, var_1_1=-8, var_1_20=25] [L20] COND FALSE !(!cond) [L72] RET assume_abort_if_not((var_1_18 >= -922337.2036854765600e+13F && var_1_18 <= -1.0e-20F) || (var_1_18 <= 9223372.036854765600e+12F && var_1_18 >= 1.0e-20F )) VAL [isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=1, var_1_15=1, var_1_16=-16, var_1_17=7/2, var_1_18=518, var_1_19=50, var_1_1=-8, var_1_20=25] [L73] var_1_20 = __VERIFIER_nondet_ulong() [L74] CALL assume_abort_if_not(var_1_20 >= 0) VAL [\old(cond)=1, isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=1, var_1_15=1, var_1_16=-16, var_1_17=7/2, var_1_18=518, var_1_19=50, var_1_1=-8, var_1_20=0] [L20] COND FALSE !(!cond) [L74] RET assume_abort_if_not(var_1_20 >= 0) VAL [isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=1, var_1_15=1, var_1_16=-16, var_1_17=7/2, var_1_18=518, var_1_19=50, var_1_1=-8, var_1_20=0] [L75] CALL assume_abort_if_not(var_1_20 <= 4294967294) VAL [\old(cond)=1, isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=1, var_1_15=1, var_1_16=-16, var_1_17=7/2, var_1_18=518, var_1_19=50, var_1_1=-8, var_1_20=0] [L20] COND FALSE !(!cond) [L75] RET assume_abort_if_not(var_1_20 <= 4294967294) VAL [isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=1, var_1_15=1, var_1_16=-16, var_1_17=7/2, var_1_18=518, var_1_19=50, var_1_1=-8, var_1_20=0] [L88] RET updateVariables() [L89] CALL step() [L37] var_1_13 = (var_1_14 && var_1_15) [L38] var_1_17 = var_1_18 [L39] var_1_19 = var_1_20 [L40] COND FALSE !((- (var_1_17 + var_1_17)) > var_1_17) [L43] var_1_16 = var_1_19 [L44] EXPR var_1_16 | var_1_19 [L44] COND FALSE !(((var_1_16 | var_1_19) > var_1_16) && var_1_11) [L55] var_1_1 = var_1_10 [L89] RET step() [L90] CALL, EXPR property() [L80] EXPR var_1_16 | var_1_19 [L80-L81] return ((((((((var_1_16 | var_1_19) > var_1_16) && var_1_11) ? (((var_1_19 != -16) && (var_1_17 <= (var_1_17 + var_1_17))) ? ((var_1_17 > var_1_17) ? (var_1_1 == ((signed char) var_1_10)) : (var_1_1 == ((signed char) var_1_10))) : (var_1_1 == ((signed char) var_1_10))) : (var_1_1 == ((signed char) var_1_10))) && (((- (var_1_17 + var_1_17)) > var_1_17) ? (var_1_11 == ((unsigned char) var_1_12)) : 1)) && (var_1_13 == ((unsigned char) (var_1_14 && var_1_15)))) && (var_1_16 == ((signed long int) var_1_19))) && (var_1_17 == ((float) var_1_18))) && (var_1_19 == ((unsigned long int) var_1_20)) ; [L90] RET, EXPR property() [L90] CALL __VERIFIER_assert(property()) [L19] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=1, var_1_15=1, var_1_16=0, var_1_17=518, var_1_18=518, var_1_19=0, var_1_1=0, var_1_20=0] [L19] reach_error() VAL [\old(cond)=0, cond=0, isInitial=1, var_1_10=0, var_1_11=0, var_1_12=0, var_1_13=1, var_1_14=1, var_1_15=1, var_1_16=0, var_1_17=518, var_1_18=518, var_1_19=0, var_1_1=0, var_1_20=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 1, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-19 05:20:53,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-88.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bc4858d1901c3c90630688f631857e35419d28ea39c5c3a06b704467149a98bd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:20:55,962 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:20:56,072 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-19 05:20:56,080 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:20:56,080 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:20:56,133 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:20:56,134 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:20:56,135 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:20:56,136 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:20:56,141 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:20:56,141 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:20:56,142 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:20:56,142 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:20:56,144 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:20:56,145 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:20:56,145 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:20:56,146 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:20:56,147 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:20:56,147 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:20:56,148 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:20:56,148 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:20:56,149 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:20:56,150 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:20:56,150 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:20:56,151 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 05:20:56,151 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-19 05:20:56,152 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-19 05:20:56,152 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:20:56,153 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:20:56,153 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:20:56,155 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:20:56,155 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 05:20:56,155 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:20:56,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:20:56,156 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:20:56,156 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:20:56,157 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:20:56,157 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-19 05:20:56,157 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-19 05:20:56,159 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:20:56,159 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:20:56,159 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:20:56,160 INFO L153 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc4858d1901c3c90630688f631857e35419d28ea39c5c3a06b704467149a98bd [2023-11-19 05:20:56,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:20:56,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:20:56,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:20:56,576 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:20:56,578 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:20:56,580 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-88.i [2023-11-19 05:20:59,624 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:20:59,886 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:20:59,887 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-88.i [2023-11-19 05:20:59,896 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/data/147fb7157/4cd890eac8514476941bf46fe8bfe414/FLAG1b8aae94b [2023-11-19 05:20:59,911 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/data/147fb7157/4cd890eac8514476941bf46fe8bfe414 [2023-11-19 05:20:59,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:20:59,916 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:20:59,917 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:20:59,918 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:20:59,923 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:20:59,924 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:20:59" (1/1) ... [2023-11-19 05:20:59,925 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fbdf2f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:59, skipping insertion in model container [2023-11-19 05:20:59,925 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:20:59" (1/1) ... [2023-11-19 05:20:59,951 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:21:00,101 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-88.i[915,928] [2023-11-19 05:21:00,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:21:00,153 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:21:00,167 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-88.i[915,928] [2023-11-19 05:21:00,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:21:00,220 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:21:00,221 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:00 WrapperNode [2023-11-19 05:21:00,221 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:21:00,223 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:21:00,223 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:21:00,224 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:21:00,232 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:00" (1/1) ... [2023-11-19 05:21:00,259 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:00" (1/1) ... [2023-11-19 05:21:00,298 INFO L138 Inliner]: procedures = 27, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 88 [2023-11-19 05:21:00,299 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:21:00,301 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:21:00,301 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:21:00,301 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:21:00,311 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:00" (1/1) ... [2023-11-19 05:21:00,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:00" (1/1) ... [2023-11-19 05:21:00,323 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:00" (1/1) ... [2023-11-19 05:21:00,324 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:00" (1/1) ... [2023-11-19 05:21:00,344 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:00" (1/1) ... [2023-11-19 05:21:00,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:00" (1/1) ... [2023-11-19 05:21:00,357 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:00" (1/1) ... [2023-11-19 05:21:00,366 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:00" (1/1) ... [2023-11-19 05:21:00,370 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:21:00,371 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:21:00,375 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:21:00,375 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:21:00,376 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:00" (1/1) ... [2023-11-19 05:21:00,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:21:00,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:00,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:21:00,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:21:00,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:21:00,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-19 05:21:00,463 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:21:00,463 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:21:00,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:21:00,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:21:00,631 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:21:00,633 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:21:01,013 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:21:01,021 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:21:01,021 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:21:01,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:21:01 BoogieIcfgContainer [2023-11-19 05:21:01,025 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:21:01,027 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:21:01,028 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:21:01,031 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:21:01,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:20:59" (1/3) ... [2023-11-19 05:21:01,032 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275041e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:21:01, skipping insertion in model container [2023-11-19 05:21:01,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:00" (2/3) ... [2023-11-19 05:21:01,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275041e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:21:01, skipping insertion in model container [2023-11-19 05:21:01,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:21:01" (3/3) ... [2023-11-19 05:21:01,036 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_25-while_file-88.i [2023-11-19 05:21:01,054 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:21:01,054 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:21:01,097 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:21:01,102 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@74a86e6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:21:01,103 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:21:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 28 states have internal predecessors, (36), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 05:21:01,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-19 05:21:01,115 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:01,116 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:01,117 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:01,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:01,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2064427227, now seen corresponding path program 1 times [2023-11-19 05:21:01,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:21:01,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799350193] [2023-11-19 05:21:01,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:01,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:21:01,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:21:01,139 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 05:21:01,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-19 05:21:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:01,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 05:21:01,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-11-19 05:21:01,400 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:21:01,401 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:21:01,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799350193] [2023-11-19 05:21:01,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799350193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:01,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:01,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:21:01,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517975985] [2023-11-19 05:21:01,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:01,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:21:01,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:21:01,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:21:01,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:21:01,443 INFO L87 Difference]: Start difference. First operand has 41 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 28 states have internal predecessors, (36), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-19 05:21:01,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:01,469 INFO L93 Difference]: Finished difference Result 75 states and 121 transitions. [2023-11-19 05:21:01,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:21:01,471 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 73 [2023-11-19 05:21:01,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:01,478 INFO L225 Difference]: With dead ends: 75 [2023-11-19 05:21:01,479 INFO L226 Difference]: Without dead ends: 37 [2023-11-19 05:21:01,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:21:01,486 INFO L413 NwaCegarLoop]: 50 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, 50 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 [2023-11-19 05:21:01,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:21:01,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-19 05:21:01,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-19 05:21:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 05:21:01,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2023-11-19 05:21:01,530 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 73 [2023-11-19 05:21:01,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:01,531 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2023-11-19 05:21:01,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-19 05:21:01,531 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2023-11-19 05:21:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-19 05:21:01,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:01,536 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:01,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:01,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:21:01,742 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:01,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:01,743 INFO L85 PathProgramCache]: Analyzing trace with hash -211911261, now seen corresponding path program 1 times [2023-11-19 05:21:01,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:21:01,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191060882] [2023-11-19 05:21:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:01,746 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:21:01,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:21:01,748 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 05:21:01,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-19 05:21:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:01,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 05:21:01,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 90 proven. 6 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-19 05:21:05,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:21:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-19 05:21:12,630 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:21:12,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191060882] [2023-11-19 05:21:12,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191060882] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 05:21:12,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:21:12,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2023-11-19 05:21:12,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612252316] [2023-11-19 05:21:12,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:12,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:21:12,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:21:12,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:21:12,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-11-19 05:21:12,636 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2023-11-19 05:21:23,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:23,236 INFO L93 Difference]: Finished difference Result 113 states and 154 transitions. [2023-11-19 05:21:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 05:21:23,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 73 [2023-11-19 05:21:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:23,244 INFO L225 Difference]: With dead ends: 113 [2023-11-19 05:21:23,244 INFO L226 Difference]: Without dead ends: 79 [2023-11-19 05:21:23,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-11-19 05:21:23,249 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 66 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:23,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 245 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-11-19 05:21:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-19 05:21:23,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2023-11-19 05:21:23,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 05:21:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2023-11-19 05:21:23,281 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 73 [2023-11-19 05:21:23,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:23,283 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2023-11-19 05:21:23,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2023-11-19 05:21:23,284 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2023-11-19 05:21:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-19 05:21:23,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:23,287 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:23,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:23,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:21:23,494 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:23,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:23,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1563096101, now seen corresponding path program 1 times [2023-11-19 05:21:23,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:21:23,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445389857] [2023-11-19 05:21:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:23,499 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:21:23,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:21:23,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 05:21:23,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-19 05:21:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:23,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 05:21:23,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 149 proven. 24 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-19 05:21:28,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:21:38,301 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:21:38,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445389857] [2023-11-19 05:21:38,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445389857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:21:38,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [53531458] [2023-11-19 05:21:38,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:38,303 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 05:21:38,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 05:21:38,311 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 05:21:38,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28808811-13da-4961-a422-f85e14c45a7f/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-11-19 05:21:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:38,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 05:21:38,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 90 proven. 6 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-19 05:21:44,964 INFO L327 TraceCheckSpWp]: Computing backward predicates...