./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-b.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_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme --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 c117c02695ddb101583ad96117955e242a853299846ac846441a25e3775ce242 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:54:57,370 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:54:57,446 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:54:57,452 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:54:57,453 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:54:57,479 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:54:57,480 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:54:57,481 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:54:57,482 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:54:57,482 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:54:57,483 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:54:57,483 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:54:57,484 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:54:57,485 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:54:57,485 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:54:57,486 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:54:57,487 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:54:57,487 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:54:57,488 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:54:57,488 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:54:57,488 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:54:57,489 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:54:57,490 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:54:57,490 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:54:57,490 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:54:57,491 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:54:57,491 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:54:57,492 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:54:57,492 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:54:57,493 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:54:57,493 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:54:57,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:54:57,494 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:54:57,495 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:54:57,495 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:54:57,495 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:54:57,496 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:54:57,496 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:54:57,496 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:54:57,496 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:54:57,496 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:54:57,497 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:54:57,497 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_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c117c02695ddb101583ad96117955e242a853299846ac846441a25e3775ce242 [2023-11-26 11:54:57,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:54:57,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:54:57,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:54:57,803 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:54:57,803 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:54:57,805 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-b.c [2023-11-26 11:55:00,956 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:55:01,164 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:55:01,164 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-b.c [2023-11-26 11:55:01,173 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/data/3a359ab05/1153395524e741dca6d3c4ba1fcd012d/FLAG613bf1c11 [2023-11-26 11:55:01,189 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/data/3a359ab05/1153395524e741dca6d3c4ba1fcd012d [2023-11-26 11:55:01,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:55:01,194 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:55:01,195 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:01,196 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:55:01,201 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:55:01,202 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:01" (1/1) ... [2023-11-26 11:55:01,204 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4446a0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:01, skipping insertion in model container [2023-11-26 11:55:01,204 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:01" (1/1) ... [2023-11-26 11:55:01,228 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:55:01,436 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_e49a201b-5317-45a6-a611-afc43d8f42b0/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-b.c[1476,1489] [2023-11-26 11:55:01,445 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_e49a201b-5317-45a6-a611-afc43d8f42b0/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-b.c[1549,1562] [2023-11-26 11:55:01,446 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:01,460 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:55:01,495 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_e49a201b-5317-45a6-a611-afc43d8f42b0/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-b.c[1476,1489] [2023-11-26 11:55:01,499 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_e49a201b-5317-45a6-a611-afc43d8f42b0/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-b.c[1549,1562] [2023-11-26 11:55:01,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:01,519 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:55:01,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:01 WrapperNode [2023-11-26 11:55:01,520 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:01,522 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:01,522 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:55:01,522 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:55:01,533 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:01" (1/1) ... [2023-11-26 11:55:01,555 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:01" (1/1) ... [2023-11-26 11:55:01,586 INFO L138 Inliner]: procedures = 13, calls = 46, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2023-11-26 11:55:01,587 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:01,588 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:55:01,588 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:55:01,588 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:55:01,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:01" (1/1) ... [2023-11-26 11:55:01,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:01" (1/1) ... [2023-11-26 11:55:01,606 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:01" (1/1) ... [2023-11-26 11:55:01,637 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 5, 4, 4, 3]. 28 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 1, 1, 1, 1]. The 3 writes are split as follows [0, 1, 1, 1, 0]. [2023-11-26 11:55:01,637 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:01" (1/1) ... [2023-11-26 11:55:01,637 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:01" (1/1) ... [2023-11-26 11:55:01,652 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:01" (1/1) ... [2023-11-26 11:55:01,654 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:01" (1/1) ... [2023-11-26 11:55:01,656 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:01" (1/1) ... [2023-11-26 11:55:01,657 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:01" (1/1) ... [2023-11-26 11:55:01,660 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:55:01,661 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:55:01,661 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:55:01,661 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:55:01,662 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:01" (1/1) ... [2023-11-26 11:55:01,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:01,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:01,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:55:01,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:55:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:55:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:55:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:55:01,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:55:01,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:55:01,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:55:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:55:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:55:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:55:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:55:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:55:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:55:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:55:01,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:55:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:55:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:55:01,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:55:01,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:55:01,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:55:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:55:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_12_to_15_0 [2023-11-26 11:55:01,755 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_12_to_15_0 [2023-11-26 11:55:01,857 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:55:01,860 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:55:02,055 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:55:02,114 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:55:02,115 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 11:55:02,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:02 BoogieIcfgContainer [2023-11-26 11:55:02,116 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:55:02,119 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:55:02,119 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:55:02,125 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:55:02,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:55:01" (1/3) ... [2023-11-26 11:55:02,126 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcda702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:02, skipping insertion in model container [2023-11-26 11:55:02,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:01" (2/3) ... [2023-11-26 11:55:02,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcda702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:02, skipping insertion in model container [2023-11-26 11:55:02,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:02" (3/3) ... [2023-11-26 11:55:02,129 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_linear-inequality-inv-b.c [2023-11-26 11:55:02,158 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:55:02,159 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-26 11:55:02,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:55:02,226 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;@4dc7ba93, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:55:02,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-26 11:55:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 14 states have internal predecessors, (17), 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) [2023-11-26 11:55:02,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 11:55:02,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:02,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:02,249 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:02,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:02,261 INFO L85 PathProgramCache]: Analyzing trace with hash 947785726, now seen corresponding path program 1 times [2023-11-26 11:55:02,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:02,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235417067] [2023-11-26 11:55:02,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:02,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:03,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:55:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:03,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:03,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:03,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235417067] [2023-11-26 11:55:03,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235417067] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:03,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:03,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:55:03,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52406607] [2023-11-26 11:55:03,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:03,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:55:03,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:03,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:55:03,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:55:03,331 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 14 states have internal predecessors, (17), 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 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:55:03,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:03,479 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-11-26 11:55:03,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:55:03,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-26 11:55:03,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:03,495 INFO L225 Difference]: With dead ends: 26 [2023-11-26 11:55:03,495 INFO L226 Difference]: Without dead ends: 14 [2023-11-26 11:55:03,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:55:03,504 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:03,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 27 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:55:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-26 11:55:03,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-26 11:55:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:55:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-11-26 11:55:03,554 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2023-11-26 11:55:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:03,555 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-11-26 11:55:03,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:55:03,556 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-11-26 11:55:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 11:55:03,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:03,559 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:03,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:55:03,559 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:03,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:03,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1341401249, now seen corresponding path program 1 times [2023-11-26 11:55:03,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:03,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427781360] [2023-11-26 11:55:03,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:03,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:04,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:55:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:04,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:55:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:04,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:04,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427781360] [2023-11-26 11:55:04,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427781360] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:04,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47761614] [2023-11-26 11:55:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:04,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:04,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:04,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:04,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:55:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:05,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-26 11:55:05,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:05,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:55:05,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-26 11:55:05,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-26 11:55:05,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-26 11:55:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:05,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:05,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-26 11:55:06,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2023-11-26 11:55:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:11,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47761614] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:11,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:11,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-11-26 11:55:11,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347465067] [2023-11-26 11:55:11,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:11,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 11:55:11,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:11,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 11:55:11,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=358, Unknown=1, NotChecked=0, Total=420 [2023-11-26 11:55:11,382 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 21 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 11:55:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:11,955 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-11-26 11:55:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:55:11,956 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 15 [2023-11-26 11:55:11,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:11,957 INFO L225 Difference]: With dead ends: 24 [2023-11-26 11:55:11,957 INFO L226 Difference]: Without dead ends: 18 [2023-11-26 11:55:11,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=130, Invalid=625, Unknown=1, NotChecked=0, Total=756 [2023-11-26 11:55:11,959 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:11,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:55:11,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-26 11:55:11,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-26 11:55:11,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:55:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-11-26 11:55:11,972 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2023-11-26 11:55:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:11,974 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-11-26 11:55:11,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 11:55:11,979 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-11-26 11:55:11,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 11:55:11,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:11,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:11,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:12,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:12,188 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:12,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:12,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2114283542, now seen corresponding path program 2 times [2023-11-26 11:55:12,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:12,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413924261] [2023-11-26 11:55:12,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:12,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:55:12,265 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:55:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:55:12,341 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:55:12,341 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 11:55:12,343 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-11-26 11:55:12,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-26 11:55:12,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:55:12,349 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-11-26 11:55:12,353 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 11:55:12,398 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-26 11:55:12,399 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-26 11:55:12,401 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-26 11:55:12,401 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-26 11:55:12,402 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-26 11:55:12,403 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-26 11:55:12,425 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 11:55:12 BoogieIcfgContainer [2023-11-26 11:55:12,425 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 11:55:12,426 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 11:55:12,426 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 11:55:12,427 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 11:55:12,427 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:02" (3/4) ... [2023-11-26 11:55:12,428 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-26 11:55:12,446 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-26 11:55:12,446 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-26 11:55:12,449 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-26 11:55:12,449 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-26 11:55:12,450 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-26 11:55:12,450 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-26 11:55:12,499 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 11:55:12,499 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 11:55:12,500 INFO L158 Benchmark]: Toolchain (without parser) took 11306.35ms. Allocated memory was 151.0MB in the beginning and 205.5MB in the end (delta: 54.5MB). Free memory was 103.8MB in the beginning and 149.2MB in the end (delta: -45.4MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. [2023-11-26 11:55:12,501 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 151.0MB. Free memory is still 96.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:55:12,501 INFO L158 Benchmark]: CACSL2BoogieTranslator took 325.17ms. Allocated memory is still 151.0MB. Free memory was 103.6MB in the beginning and 93.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-26 11:55:12,502 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.15ms. Allocated memory is still 151.0MB. Free memory was 92.8MB in the beginning and 91.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 11:55:12,502 INFO L158 Benchmark]: Boogie Preprocessor took 72.30ms. Allocated memory is still 151.0MB. Free memory was 91.2MB in the beginning and 89.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 11:55:12,503 INFO L158 Benchmark]: RCFGBuilder took 455.02ms. Allocated memory was 151.0MB in the beginning and 205.5MB in the end (delta: 54.5MB). Free memory was 89.1MB in the beginning and 173.5MB in the end (delta: -84.4MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2023-11-26 11:55:12,503 INFO L158 Benchmark]: TraceAbstraction took 10306.99ms. Allocated memory is still 205.5MB. Free memory was 172.8MB in the beginning and 151.3MB in the end (delta: 21.5MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. [2023-11-26 11:55:12,504 INFO L158 Benchmark]: Witness Printer took 73.29ms. Allocated memory is still 205.5MB. Free memory was 151.3MB in the beginning and 149.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 11:55:12,506 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 151.0MB. Free memory is still 96.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 325.17ms. Allocated memory is still 151.0MB. Free memory was 103.6MB in the beginning and 93.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.15ms. Allocated memory is still 151.0MB. Free memory was 92.8MB in the beginning and 91.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 72.30ms. Allocated memory is still 151.0MB. Free memory was 91.2MB in the beginning and 89.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 455.02ms. Allocated memory was 151.0MB in the beginning and 205.5MB in the end (delta: 54.5MB). Free memory was 89.1MB in the beginning and 173.5MB in the end (delta: -84.4MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. * TraceAbstraction took 10306.99ms. Allocated memory is still 205.5MB. Free memory was 172.8MB in the beginning and 151.3MB in the end (delta: 21.5MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. * Witness Printer took 73.29ms. Allocated memory is still 205.5MB. Free memory was 151.3MB in the beginning and 149.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 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 - CounterExampleResult [Line: 52]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] unsigned char n = __VERIFIER_nondet_uchar(); [L38] unsigned char n = __VERIFIER_nondet_uchar(); [L39] EXPR \read(n) [L39] COND FALSE !(n == 0) [L46] unsigned char v = 0; [L46] unsigned char v = 0; [L47] unsigned char s = 0; [L47] unsigned char s = 0; [L48] unsigned int i = 0; [L48] unsigned int i = 0; [L49] CALL func_to_recursive_line_12_to_15_0(&v, &n, &s, &i) VAL [i={5:0}, n={6:0}, s={7:0}, v={8:0}] [L22] EXPR \read(*i) [L22] EXPR \read(*n) VAL [i={5:0}, i={5:0}, n={6:0}, n={6:0}, s={7:0}, s={7:0}, v={8:0}, v={8:0}] [L22] COND TRUE (*i) < (*n) [L25] *v = __VERIFIER_nondet_uchar() [L26] EXPR \read(*s) [L26] EXPR \read(*v) [L26] *s += *v [L27] EXPR \read(*i) [L27] ++(*i) [L27] ++(*i) [L29] CALL func_to_recursive_line_12_to_15_0(v, n, s, i) VAL [i={5:0}, n={6:0}, s={7:0}, v={8:0}] [L22] EXPR \read(*i) [L22] EXPR \read(*n) VAL [i={5:0}, i={5:0}, n={6:0}, n={6:0}, s={7:0}, s={7:0}, v={8:0}, v={8:0}] [L22] COND TRUE (*i) < (*n) [L25] *v = __VERIFIER_nondet_uchar() [L26] EXPR \read(*s) [L26] EXPR \read(*v) [L26] *s += *v [L27] EXPR \read(*i) [L27] ++(*i) [L27] ++(*i) [L29] CALL func_to_recursive_line_12_to_15_0(v, n, s, i) VAL [i={5:0}, n={6:0}, s={7:0}, v={8:0}] [L22] EXPR \read(*i) [L22] EXPR \read(*n) VAL [i={5:0}, i={5:0}, n={6:0}, n={6:0}, s={7:0}, s={7:0}, v={8:0}, v={8:0}] [L22] COND FALSE !((*i) < (*n)) [L29] RET func_to_recursive_line_12_to_15_0(v, n, s, i) VAL [i={5:0}, i={5:0}, n={6:0}, n={6:0}, s={7:0}, s={7:0}, v={8:0}, v={8:0}] [L29] RET func_to_recursive_line_12_to_15_0(v, n, s, i) VAL [i={5:0}, i={5:0}, n={6:0}, n={6:0}, s={7:0}, s={7:0}, v={8:0}, v={8:0}] [L49] RET func_to_recursive_line_12_to_15_0(&v, &n, &s, &i) VAL [i={5:0}, n={6:0}, s={7:0}, v={8:0}] [L50] EXPR \read(s) [L50] EXPR \read(v) [L50] COND TRUE s < v [L52] reach_error() VAL [i={5:0}, n={6:0}, s={7:0}, v={8:0}] - UnprovableResult [Line: 60]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 10.2s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 28 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 28 mSDsluCounter, 73 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 57 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 129 IncrementalHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 16 mSDtfsCounter, 129 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=2, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 8.3s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 51 ConstructedInterpolants, 5 QuantifiedInterpolants, 1602 SizeOfPredicates, 11 NumberOfNonLiveVariables, 182 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 2/12 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 proved your program to be incorrect! [2023-11-26 11:55:12,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49a201b-5317-45a6-a611-afc43d8f42b0/bin/uautomizer-verify-VRDe98Ueme/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 Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE