./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/pipeline.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/pipeline.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx --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 c42f0f019aa30bac52b753d657fd0a7a27ad0fcef5ea61d179259276789b8861 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 21:04:01,125 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 21:04:01,194 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 21:04:01,199 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 21:04:01,200 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 21:04:01,228 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 21:04:01,229 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 21:04:01,229 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 21:04:01,230 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 21:04:01,231 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 21:04:01,232 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 21:04:01,232 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 21:04:01,233 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 21:04:01,234 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 21:04:01,235 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 21:04:01,235 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 21:04:01,236 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 21:04:01,237 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 21:04:01,237 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 21:04:01,238 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 21:04:01,239 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 21:04:01,240 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 21:04:01,240 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 21:04:01,241 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 21:04:01,242 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 21:04:01,242 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 21:04:01,243 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 21:04:01,244 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 21:04:01,244 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 21:04:01,245 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 21:04:01,245 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 21:04:01,246 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:04:01,247 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 21:04:01,247 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 21:04:01,248 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 21:04:01,248 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 21:04:01,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 21:04:01,249 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 21:04:01,249 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 21:04:01,249 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 21:04:01,250 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 21:04:01,250 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 21:04:01,251 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_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c42f0f019aa30bac52b753d657fd0a7a27ad0fcef5ea61d179259276789b8861 [2023-11-21 21:04:01,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 21:04:01,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 21:04:01,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 21:04:01,601 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 21:04:01,601 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 21:04:01,602 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/systemc/pipeline.cil-2.c [2023-11-21 21:04:04,734 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 21:04:04,952 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 21:04:04,953 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/sv-benchmarks/c/systemc/pipeline.cil-2.c [2023-11-21 21:04:04,975 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/data/d9f6d84e8/2d560de6b59244ea9a23a8f6764b0dab/FLAG8329ba5b8 [2023-11-21 21:04:04,998 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/data/d9f6d84e8/2d560de6b59244ea9a23a8f6764b0dab [2023-11-21 21:04:05,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 21:04:05,003 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 21:04:05,004 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 21:04:05,005 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 21:04:05,013 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 21:04:05,013 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:04:05" (1/1) ... [2023-11-21 21:04:05,016 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54ce6fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:05, skipping insertion in model container [2023-11-21 21:04:05,016 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:04:05" (1/1) ... [2023-11-21 21:04:05,065 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:04:05,221 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_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/sv-benchmarks/c/systemc/pipeline.cil-2.c[640,653] [2023-11-21 21:04:05,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:04:05,323 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 21:04:05,333 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_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/sv-benchmarks/c/systemc/pipeline.cil-2.c[640,653] [2023-11-21 21:04:05,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:04:05,410 INFO L206 MainTranslator]: Completed translation [2023-11-21 21:04:05,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:05 WrapperNode [2023-11-21 21:04:05,410 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 21:04:05,411 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 21:04:05,412 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 21:04:05,412 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 21:04:05,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:05" (1/1) ... [2023-11-21 21:04:05,432 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:05" (1/1) ... [2023-11-21 21:04:05,476 INFO L138 Inliner]: procedures = 20, calls = 17, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 426 [2023-11-21 21:04:05,477 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 21:04:05,477 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 21:04:05,477 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 21:04:05,478 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 21:04:05,495 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:05" (1/1) ... [2023-11-21 21:04:05,496 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:05" (1/1) ... [2023-11-21 21:04:05,514 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:05" (1/1) ... [2023-11-21 21:04:05,539 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 21:04:05,540 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:05" (1/1) ... [2023-11-21 21:04:05,540 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:05" (1/1) ... [2023-11-21 21:04:05,552 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:05" (1/1) ... [2023-11-21 21:04:05,578 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:05" (1/1) ... [2023-11-21 21:04:05,581 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:05" (1/1) ... [2023-11-21 21:04:05,584 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:05" (1/1) ... [2023-11-21 21:04:05,589 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 21:04:05,590 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 21:04:05,590 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 21:04:05,590 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 21:04:05,591 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:05" (1/1) ... [2023-11-21 21:04:05,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:04:05,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:04:05,632 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 21:04:05,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 21:04:05,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 21:04:05,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 21:04:05,675 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-11-21 21:04:05,675 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-11-21 21:04:05,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 21:04:05,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 21:04:05,833 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 21:04:05,835 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 21:04:06,579 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 21:04:07,285 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 21:04:07,286 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 21:04:07,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:04:07 BoogieIcfgContainer [2023-11-21 21:04:07,288 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 21:04:07,293 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 21:04:07,293 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 21:04:07,296 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 21:04:07,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:04:05" (1/3) ... [2023-11-21 21:04:07,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f38b66c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:04:07, skipping insertion in model container [2023-11-21 21:04:07,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:05" (2/3) ... [2023-11-21 21:04:07,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f38b66c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:04:07, skipping insertion in model container [2023-11-21 21:04:07,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:04:07" (3/3) ... [2023-11-21 21:04:07,301 INFO L112 eAbstractionObserver]: Analyzing ICFG pipeline.cil-2.c [2023-11-21 21:04:07,322 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 21:04:07,322 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 21:04:07,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:04:07,389 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;@38fbc3b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:04:07,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 21:04:07,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:04:07,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 21:04:07,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:07,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:04:07,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:07,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1828699382, now seen corresponding path program 1 times [2023-11-21 21:04:07,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:07,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102487825] [2023-11-21 21:04:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:07,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:08,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:04:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:08,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 21:04:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 21:04:08,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:04:08,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102487825] [2023-11-21 21:04:08,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102487825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:04:08,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:04:08,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 21:04:08,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012631831] [2023-11-21 21:04:08,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:04:08,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:04:08,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:04:08,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:04:08,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:08,314 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:04:08,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:04:08,454 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2023-11-21 21:04:08,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:04:08,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-11-21 21:04:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:04:08,468 INFO L225 Difference]: With dead ends: 57 [2023-11-21 21:04:08,468 INFO L226 Difference]: Without dead ends: 29 [2023-11-21 21:04:08,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:08,477 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:04:08,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:04:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-21 21:04:08,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-21 21:04:08,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:04:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2023-11-21 21:04:08,519 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 16 [2023-11-21 21:04:08,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:04:08,519 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2023-11-21 21:04:08,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:04:08,520 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2023-11-21 21:04:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-21 21:04:08,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:08,522 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:04:08,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 21:04:08,523 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:08,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:08,523 INFO L85 PathProgramCache]: Analyzing trace with hash -88336014, now seen corresponding path program 1 times [2023-11-21 21:04:08,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:08,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249949808] [2023-11-21 21:04:08,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:08,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:10,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:04:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:10,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 21:04:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:04:11,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:04:11,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249949808] [2023-11-21 21:04:11,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249949808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:04:11,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026626272] [2023-11-21 21:04:11,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:11,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:04:11,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:04:11,327 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:04:11,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 21:04:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:11,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 21:04:11,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:04:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-21 21:04:11,667 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:04:11,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026626272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:04:11,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:04:11,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2023-11-21 21:04:11,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23857814] [2023-11-21 21:04:11,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:04:11,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 21:04:11,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:04:11,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 21:04:11,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-21 21:04:11,671 INFO L87 Difference]: Start difference. First operand 29 states and 42 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 21:04:11,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:04:11,754 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2023-11-21 21:04:11,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 21:04:11,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-11-21 21:04:11,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:04:11,759 INFO L225 Difference]: With dead ends: 67 [2023-11-21 21:04:11,759 INFO L226 Difference]: Without dead ends: 40 [2023-11-21 21:04:11,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-21 21:04:11,763 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:04:11,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:04:11,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-21 21:04:11,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2023-11-21 21:04:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 29 states have internal predecessors, (40), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 21:04:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2023-11-21 21:04:11,798 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 50 transitions. Word has length 40 [2023-11-21 21:04:11,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:04:11,798 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 50 transitions. [2023-11-21 21:04:11,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 21:04:11,800 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 50 transitions. [2023-11-21 21:04:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-21 21:04:11,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:11,808 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:04:11,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 21:04:12,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:04:12,024 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:12,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:12,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1229059762, now seen corresponding path program 1 times [2023-11-21 21:04:12,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:12,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329293113] [2023-11-21 21:04:12,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:12,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:14,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:04:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:14,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 21:04:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:14,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 21:04:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:14,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-21 21:04:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 2 proven. 75 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-21 21:04:14,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:04:14,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329293113] [2023-11-21 21:04:14,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329293113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:04:14,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267024314] [2023-11-21 21:04:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:14,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:04:14,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:04:14,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:04:14,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 21:04:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:15,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 21:04:15,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:04:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-21 21:04:15,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:04:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-21 21:04:15,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267024314] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:04:15,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:04:15,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2023-11-21 21:04:15,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51627319] [2023-11-21 21:04:15,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:04:15,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 21:04:15,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:04:15,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 21:04:15,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-11-21 21:04:15,444 INFO L87 Difference]: Start difference. First operand 35 states and 50 transitions. Second operand has 16 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-21 21:04:16,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:04:16,937 INFO L93 Difference]: Finished difference Result 143 states and 222 transitions. [2023-11-21 21:04:16,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-21 21:04:16,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 78 [2023-11-21 21:04:16,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:04:16,946 INFO L225 Difference]: With dead ends: 143 [2023-11-21 21:04:16,946 INFO L226 Difference]: Without dead ends: 110 [2023-11-21 21:04:16,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2023-11-21 21:04:16,953 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 139 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 21:04:16,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 353 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 21:04:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-21 21:04:17,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2023-11-21 21:04:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 75 states have (on average 1.44) internal successors, (108), 77 states have internal predecessors, (108), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) [2023-11-21 21:04:17,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 142 transitions. [2023-11-21 21:04:17,018 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 142 transitions. Word has length 78 [2023-11-21 21:04:17,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:04:17,019 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 142 transitions. [2023-11-21 21:04:17,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-21 21:04:17,020 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 142 transitions. [2023-11-21 21:04:17,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-21 21:04:17,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:17,036 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:04:17,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 21:04:17,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:04:17,250 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:17,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:17,251 INFO L85 PathProgramCache]: Analyzing trace with hash -720751946, now seen corresponding path program 1 times [2023-11-21 21:04:17,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:17,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886112555] [2023-11-21 21:04:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:17,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:23,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:04:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:24,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 21:04:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:24,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 21:04:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:25,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-21 21:04:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:25,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-11-21 21:04:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:25,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-21 21:04:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:25,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-11-21 21:04:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:25,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2023-11-21 21:04:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:25,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-11-21 21:04:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:25,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2023-11-21 21:04:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 27 proven. 470 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2023-11-21 21:04:25,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:04:25,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886112555] [2023-11-21 21:04:25,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886112555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:04:25,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773223223] [2023-11-21 21:04:25,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:25,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:04:25,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:04:25,800 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:04:25,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 21:04:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:26,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 2645 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-21 21:04:26,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:04:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 492 proven. 16 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2023-11-21 21:04:27,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:04:39,040 WARN L293 SmtUtils]: Spent 7.92s on a formula simplification. DAG size of input: 306 DAG size of output: 52 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-21 21:04:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 96 proven. 208 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2023-11-21 21:04:39,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773223223] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:04:39,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:04:39,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 11] total 33 [2023-11-21 21:04:39,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343996852] [2023-11-21 21:04:39,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:04:39,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-21 21:04:39,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:04:39,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-21 21:04:39,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2023-11-21 21:04:39,414 INFO L87 Difference]: Start difference. First operand 91 states and 142 transitions. Second operand has 33 states, 26 states have (on average 6.230769230769231) internal successors, (162), 26 states have internal predecessors, (162), 9 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (13), 5 states have call predecessors, (13), 9 states have call successors, (13) [2023-11-21 21:04:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:04:41,844 INFO L93 Difference]: Finished difference Result 332 states and 536 transitions. [2023-11-21 21:04:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-21 21:04:41,845 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 6.230769230769231) internal successors, (162), 26 states have internal predecessors, (162), 9 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (13), 5 states have call predecessors, (13), 9 states have call successors, (13) Word has length 195 [2023-11-21 21:04:41,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:04:41,848 INFO L225 Difference]: With dead ends: 332 [2023-11-21 21:04:41,849 INFO L226 Difference]: Without dead ends: 170 [2023-11-21 21:04:41,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=718, Invalid=2704, Unknown=0, NotChecked=0, Total=3422 [2023-11-21 21:04:41,855 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 1079 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 21:04:41,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 1023 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 21:04:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-21 21:04:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 93. [2023-11-21 21:04:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 78 states have (on average 1.4102564102564104) internal successors, (110), 79 states have internal predecessors, (110), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-21 21:04:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2023-11-21 21:04:41,882 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 195 [2023-11-21 21:04:41,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:04:41,883 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2023-11-21 21:04:41,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 6.230769230769231) internal successors, (162), 26 states have internal predecessors, (162), 9 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (13), 5 states have call predecessors, (13), 9 states have call successors, (13) [2023-11-21 21:04:41,884 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2023-11-21 21:04:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-21 21:04:41,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:41,887 INFO L195 NwaCegarLoop]: trace histogram [15, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-21 21:04:41,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 21:04:42,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b8ddfd-5655-4a69-a4d1-faa8514f11df/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:04:42,116 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:42,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:42,117 INFO L85 PathProgramCache]: Analyzing trace with hash -567901882, now seen corresponding path program 2 times [2023-11-21 21:04:42,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:42,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589920497] [2023-11-21 21:04:42,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:42,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat