./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/water_pid.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/water_pid.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 934622c50be6b43827f31f94ee6f464812ea7c1827ffb5fb855e650934cdada0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:01:47,622 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:01:47,727 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 22:01:47,738 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:01:47,738 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:01:47,776 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:01:47,777 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:01:47,778 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:01:47,779 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:01:47,787 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:01:47,788 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:01:47,789 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:01:47,790 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:01:47,792 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:01:47,793 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:01:47,793 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:01:47,794 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:01:47,794 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:01:47,795 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:01:47,795 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:01:47,796 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:01:47,796 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:01:47,797 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:01:47,797 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:01:47,798 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:01:47,798 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:01:47,799 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:01:47,800 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:01:47,800 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:01:47,801 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:01:47,802 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:01:47,803 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:01:47,803 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:01:47,803 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:01:47,803 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:01:47,804 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:01:47,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:01:47,804 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:01:47,804 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:01:47,805 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:01:47,805 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:01:47,805 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:01:47,806 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 934622c50be6b43827f31f94ee6f464812ea7c1827ffb5fb855e650934cdada0 [2023-11-24 22:01:48,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:01:48,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:01:48,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:01:48,117 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:01:48,121 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:01:48,123 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/float-benchs/water_pid.c [2023-11-24 22:01:51,296 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:01:51,538 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:01:51,540 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/sv-benchmarks/c/float-benchs/water_pid.c [2023-11-24 22:01:51,551 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/data/7fd7da819/7b217dd939434d349e6a93894e0f87ce/FLAGeb7656fd4 [2023-11-24 22:01:51,573 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/data/7fd7da819/7b217dd939434d349e6a93894e0f87ce [2023-11-24 22:01:51,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:01:51,584 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:01:51,586 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:01:51,586 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:01:51,592 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:01:51,593 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:01:51" (1/1) ... [2023-11-24 22:01:51,594 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21729133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:51, skipping insertion in model container [2023-11-24 22:01:51,594 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:01:51" (1/1) ... [2023-11-24 22:01:51,624 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:01:51,831 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_a1a69401-3fa8-4d4f-b0f6-032413373163/sv-benchmarks/c/float-benchs/water_pid.c[452,465] [2023-11-24 22:01:51,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:01:51,874 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:01:51,889 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_a1a69401-3fa8-4d4f-b0f6-032413373163/sv-benchmarks/c/float-benchs/water_pid.c[452,465] [2023-11-24 22:01:51,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:01:51,927 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:01:51,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:51 WrapperNode [2023-11-24 22:01:51,928 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:01:51,930 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:01:51,930 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:01:51,930 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:01:51,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:51" (1/1) ... [2023-11-24 22:01:51,948 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:51" (1/1) ... [2023-11-24 22:01:51,974 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2023-11-24 22:01:51,975 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:01:51,976 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:01:51,976 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:01:51,976 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:01:51,988 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:51" (1/1) ... [2023-11-24 22:01:51,989 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:51" (1/1) ... [2023-11-24 22:01:51,997 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:51" (1/1) ... [2023-11-24 22:01:52,014 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-24 22:01:52,015 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:51" (1/1) ... [2023-11-24 22:01:52,015 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:51" (1/1) ... [2023-11-24 22:01:52,023 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:51" (1/1) ... [2023-11-24 22:01:52,036 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:51" (1/1) ... [2023-11-24 22:01:52,037 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:51" (1/1) ... [2023-11-24 22:01:52,038 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:51" (1/1) ... [2023-11-24 22:01:52,040 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:01:52,042 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:01:52,042 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:01:52,042 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:01:52,046 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:51" (1/1) ... [2023-11-24 22:01:52,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:01:52,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:01:52,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:01:52,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:01:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:01:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure y [2023-11-24 22:01:52,138 INFO L138 BoogieDeclarations]: Found implementation of procedure y [2023-11-24 22:01:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:01:52,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:01:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:01:52,228 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:01:52,230 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:01:52,356 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:01:52,383 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:01:52,383 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 22:01:52,384 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:01:52 BoogieIcfgContainer [2023-11-24 22:01:52,384 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:01:52,387 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:01:52,387 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:01:52,391 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:01:52,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:01:51" (1/3) ... [2023-11-24 22:01:52,395 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e6ddd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:01:52, skipping insertion in model container [2023-11-24 22:01:52,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:51" (2/3) ... [2023-11-24 22:01:52,396 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e6ddd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:01:52, skipping insertion in model container [2023-11-24 22:01:52,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:01:52" (3/3) ... [2023-11-24 22:01:52,397 INFO L112 eAbstractionObserver]: Analyzing ICFG water_pid.c [2023-11-24 22:01:52,417 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:01:52,417 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 22:01:52,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:01:52,469 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=PETRI_NET, 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;@2eaa1f54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:01:52,470 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 22:01:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 22:01:52,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 22:01:52,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:52,482 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:52,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:52,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:52,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2031269740, now seen corresponding path program 1 times [2023-11-24 22:01:52,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:52,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987455837] [2023-11-24 22:01:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:52,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:01:52,618 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:01:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:01:52,662 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 22:01:52,664 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 22:01:52,665 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-24 22:01:52,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:01:52,673 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-24 22:01:52,678 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 22:01:52,702 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-24 22:01:52,704 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret6 could not be translated [2023-11-24 22:01:52,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 10:01:52 BoogieIcfgContainer [2023-11-24 22:01:52,715 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 22:01:52,715 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 22:01:52,716 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 22:01:52,716 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 22:01:52,716 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:01:52" (3/4) ... [2023-11-24 22:01:52,719 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-24 22:01:52,720 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 22:01:52,722 INFO L158 Benchmark]: Toolchain (without parser) took 1137.77ms. Allocated memory is still 180.4MB. Free memory was 135.6MB in the beginning and 95.0MB in the end (delta: 40.6MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2023-11-24 22:01:52,722 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 100.7MB. Free memory was 66.3MB in the beginning and 66.3MB in the end (delta: 34.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:01:52,723 INFO L158 Benchmark]: CACSL2BoogieTranslator took 342.68ms. Allocated memory is still 180.4MB. Free memory was 135.6MB in the beginning and 125.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 22:01:52,724 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.56ms. Allocated memory is still 180.4MB. Free memory was 124.4MB in the beginning and 123.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 22:01:52,725 INFO L158 Benchmark]: Boogie Preprocessor took 65.10ms. Allocated memory is still 180.4MB. Free memory was 123.0MB in the beginning and 121.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:01:52,725 INFO L158 Benchmark]: RCFGBuilder took 342.51ms. Allocated memory is still 180.4MB. Free memory was 121.7MB in the beginning and 110.5MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-24 22:01:52,726 INFO L158 Benchmark]: TraceAbstraction took 327.88ms. Allocated memory is still 180.4MB. Free memory was 109.7MB in the beginning and 95.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-24 22:01:52,726 INFO L158 Benchmark]: Witness Printer took 5.18ms. Allocated memory is still 180.4MB. Free memory is still 95.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:01:52,730 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 100.7MB. Free memory was 66.3MB in the beginning and 66.3MB in the end (delta: 34.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 342.68ms. Allocated memory is still 180.4MB. Free memory was 135.6MB in the beginning and 125.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.56ms. Allocated memory is still 180.4MB. Free memory was 124.4MB in the beginning and 123.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.10ms. Allocated memory is still 180.4MB. Free memory was 123.0MB in the beginning and 121.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 342.51ms. Allocated memory is still 180.4MB. Free memory was 121.7MB in the beginning and 110.5MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 327.88ms. Allocated memory is still 180.4MB. Free memory was 109.7MB in the beginning and 95.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 5.18ms. Allocated memory is still 180.4MB. Free memory is still 95.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 8]: 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 someBinaryDOUBLEComparisonOperation at line 46, overapproximation of to_real at line 12, overapproximation of someBinaryArithmeticDOUBLEoperation at line 41. Possible FailurePath: [L12] static NUM yn = 0; [L14] NUM ui = 0; [L24] NUM yi, yc; [L25] NUM K; [L26] NUM T; [L27] NUM taui; [L28] NUM taud; [L29] NUM ei, sumej, epi; [L30] int i; [L31] T = 1 [L32] taui = 1 [L33] taud = 1 [L34] K = .5 [L35] yc = .5 VAL [K=1/2, yc=1/2] [L36] CALL, EXPR y(0) VAL [\old(i)=0, \old(yn)=56, yn=56] [L18] yn += ui [L19] return yn; [L36] RET, EXPR y(0) VAL [K=1/2, yc=1/2, yn=55] [L36] yi = y(0) [L37] epi = yc-yi [L38] sumej = epi [L39] i=0 VAL [K=1/2, epi=57, i=0, sumej=57, yc=1/2, yi=55, yn=55] [L39] COND TRUE i<120 VAL [K=1/2, epi=57, i=0, sumej=57, yc=1/2, yi=55, yn=55] [L40] CALL, EXPR y(i) VAL [\old(i)=0, \old(yn)=55, yn=55] [L18] yn += ui [L19] return yn; [L40] RET, EXPR y(i) VAL [K=1/2, epi=57, i=0, sumej=57, yc=1/2, yi=55, yn=54] [L40] yi = y(i) [L41] ei = yc-yi [L42] sumej = sumej+ei [L43] ui = K*(ei+sumej*T/taui+taud/T*(ei-epi)) [L44] epi = ei [L46] CALL __VERIFIER_assert(epi >= -1. && epi <= 1.) [L8] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, yn=54] [L8] reach_error() VAL [\old(cond)=0, cond=0, yn=54] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 2, 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=14occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 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 [2023-11-24 22:01:52,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/water_pid.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 934622c50be6b43827f31f94ee6f464812ea7c1827ffb5fb855e650934cdada0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:01:55,553 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:01:55,699 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-24 22:01:55,709 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:01:55,710 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:01:55,758 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:01:55,759 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:01:55,760 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:01:55,761 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:01:55,766 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:01:55,767 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:01:55,768 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:01:55,769 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:01:55,771 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:01:55,771 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:01:55,772 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:01:55,773 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:01:55,774 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:01:55,774 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:01:55,775 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:01:55,776 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:01:55,777 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:01:55,777 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:01:55,778 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:01:55,778 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 22:01:55,779 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 22:01:55,780 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:01:55,780 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:01:55,781 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:01:55,781 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:01:55,783 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:01:55,783 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:01:55,784 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:01:55,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:01:55,785 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:01:55,785 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:01:55,786 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:01:55,787 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 22:01:55,787 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 22:01:55,787 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:01:55,788 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:01:55,788 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:01:55,789 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:01:55,789 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:01:55,790 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 22:01:55,790 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 934622c50be6b43827f31f94ee6f464812ea7c1827ffb5fb855e650934cdada0 [2023-11-24 22:01:56,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:01:56,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:01:56,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:01:56,276 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:01:56,277 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:01:56,280 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/float-benchs/water_pid.c [2023-11-24 22:01:59,635 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:01:59,912 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:01:59,912 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/sv-benchmarks/c/float-benchs/water_pid.c [2023-11-24 22:01:59,921 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/data/a9397b4c9/662fafcaf86f4cd89701f5ef75cac484/FLAG131c45a5d [2023-11-24 22:01:59,936 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/data/a9397b4c9/662fafcaf86f4cd89701f5ef75cac484 [2023-11-24 22:01:59,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:01:59,948 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:01:59,949 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:01:59,949 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:01:59,960 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:01:59,961 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:01:59" (1/1) ... [2023-11-24 22:01:59,963 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f58e240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:59, skipping insertion in model container [2023-11-24 22:01:59,963 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:01:59" (1/1) ... [2023-11-24 22:01:59,985 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:02:00,156 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_a1a69401-3fa8-4d4f-b0f6-032413373163/sv-benchmarks/c/float-benchs/water_pid.c[452,465] [2023-11-24 22:02:00,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:02:00,194 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:02:00,209 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_a1a69401-3fa8-4d4f-b0f6-032413373163/sv-benchmarks/c/float-benchs/water_pid.c[452,465] [2023-11-24 22:02:00,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:02:00,235 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:02:00,235 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:00 WrapperNode [2023-11-24 22:02:00,235 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:02:00,237 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:02:00,237 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:02:00,237 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:02:00,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:00" (1/1) ... [2023-11-24 22:02:00,256 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:00" (1/1) ... [2023-11-24 22:02:00,284 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2023-11-24 22:02:00,284 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:02:00,285 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:02:00,285 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:02:00,285 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:02:00,299 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:00" (1/1) ... [2023-11-24 22:02:00,299 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:00" (1/1) ... [2023-11-24 22:02:00,313 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:00" (1/1) ... [2023-11-24 22:02:00,336 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-24 22:02:00,336 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:00" (1/1) ... [2023-11-24 22:02:00,336 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:00" (1/1) ... [2023-11-24 22:02:00,344 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:00" (1/1) ... [2023-11-24 22:02:00,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:00" (1/1) ... [2023-11-24 22:02:00,367 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:00" (1/1) ... [2023-11-24 22:02:00,368 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:00" (1/1) ... [2023-11-24 22:02:00,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:02:00,372 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:02:00,372 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:02:00,373 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:02:00,373 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:00" (1/1) ... [2023-11-24 22:02:00,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:02:00,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:00,419 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:02:00,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:02:00,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:02:00,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 22:02:00,469 INFO L130 BoogieDeclarations]: Found specification of procedure y [2023-11-24 22:02:00,469 INFO L138 BoogieDeclarations]: Found implementation of procedure y [2023-11-24 22:02:00,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:02:00,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:02:00,582 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:02:00,584 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:02:05,786 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:02:05,829 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:02:05,829 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 22:02:05,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:02:05 BoogieIcfgContainer [2023-11-24 22:02:05,830 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:02:05,832 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:02:05,832 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:02:05,836 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:02:05,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:01:59" (1/3) ... [2023-11-24 22:02:05,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c979b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:02:05, skipping insertion in model container [2023-11-24 22:02:05,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:00" (2/3) ... [2023-11-24 22:02:05,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c979b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:02:05, skipping insertion in model container [2023-11-24 22:02:05,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:02:05" (3/3) ... [2023-11-24 22:02:05,839 INFO L112 eAbstractionObserver]: Analyzing ICFG water_pid.c [2023-11-24 22:02:05,860 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:02:05,860 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 22:02:05,924 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:02:05,937 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=PETRI_NET, 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;@3c1bfde8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:02:05,938 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 22:02:05,942 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 22:02:05,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 22:02:05,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:02:05,952 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:02:05,953 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:02:05,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:05,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2031269740, now seen corresponding path program 1 times [2023-11-24 22:02:05,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:02:05,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133273522] [2023-11-24 22:02:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:05,977 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 [2023-11-24 22:02:05,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:02:05,981 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 22:02:05,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1a69401-3fa8-4d4f-b0f6-032413373163/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 22:02:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:08,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-24 22:02:08,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:02:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:02:14,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:02:14,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:02:14,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133273522] [2023-11-24 22:02:14,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133273522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:14,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:14,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 22:02:14,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412109882] [2023-11-24 22:02:14,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:14,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 22:02:14,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:02:14,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 22:02:14,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-24 22:02:14,303 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:02:24,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 6.89s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 22:02:28,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 22:02:32,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 22:02:36,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 22:02:40,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 22:02:44,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 22:02:52,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 6.81s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 22:02:56,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []