./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya --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 11d6d848444c2f9afc2eba3aace7d6b72c4d182e1953661ba8811794c092f478 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:46:55,766 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:46:55,831 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:46:55,835 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:46:55,836 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:46:55,859 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:46:55,859 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:46:55,860 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:46:55,861 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:46:55,861 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:46:55,862 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:46:55,862 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:46:55,863 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:46:55,863 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:46:55,864 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:46:55,865 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:46:55,865 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:46:55,866 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:46:55,866 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:46:55,866 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:46:55,867 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:46:55,868 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:46:55,868 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:46:55,868 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:46:55,869 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:46:55,869 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:46:55,870 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:46:55,870 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:46:55,871 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:46:55,871 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:46:55,871 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:46:55,872 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:46:55,872 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:46:55,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:46:55,873 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:46:55,873 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:46:55,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:46:55,874 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:46:55,874 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:46:55,874 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:46:55,875 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:46:55,875 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:46:55,875 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_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11d6d848444c2f9afc2eba3aace7d6b72c4d182e1953661ba8811794c092f478 [2023-11-29 06:46:56,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:46:56,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:46:56,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:46:56,131 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:46:56,132 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:46:56,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loop-acceleration/underapprox_1-1.c [2023-11-29 06:46:58,932 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:46:59,118 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:46:59,119 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/sv-benchmarks/c/loop-acceleration/underapprox_1-1.c [2023-11-29 06:46:59,124 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/data/383e0d3e1/04c9d47a9ce4444fa54dd6d567ae567d/FLAG011e2d8a4 [2023-11-29 06:46:59,136 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/data/383e0d3e1/04c9d47a9ce4444fa54dd6d567ae567d [2023-11-29 06:46:59,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:46:59,140 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:46:59,141 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:46:59,141 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:46:59,146 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:46:59,146 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:46:59" (1/1) ... [2023-11-29 06:46:59,147 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@715ce001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:59, skipping insertion in model container [2023-11-29 06:46:59,147 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:46:59" (1/1) ... [2023-11-29 06:46:59,165 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:46:59,281 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_4e011382-0f80-4a2e-9eb7-555deed1cfc9/sv-benchmarks/c/loop-acceleration/underapprox_1-1.c[327,340] [2023-11-29 06:46:59,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:46:59,299 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:46:59,308 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_4e011382-0f80-4a2e-9eb7-555deed1cfc9/sv-benchmarks/c/loop-acceleration/underapprox_1-1.c[327,340] [2023-11-29 06:46:59,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:46:59,322 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:46:59,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:59 WrapperNode [2023-11-29 06:46:59,322 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:46:59,323 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:46:59,323 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:46:59,323 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:46:59,329 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:59" (1/1) ... [2023-11-29 06:46:59,336 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:59" (1/1) ... [2023-11-29 06:46:59,349 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2023-11-29 06:46:59,349 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:46:59,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:46:59,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:46:59,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:46:59,359 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:59" (1/1) ... [2023-11-29 06:46:59,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:59" (1/1) ... [2023-11-29 06:46:59,360 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:59" (1/1) ... [2023-11-29 06:46:59,369 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 06:46:59,369 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:59" (1/1) ... [2023-11-29 06:46:59,370 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:59" (1/1) ... [2023-11-29 06:46:59,372 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:59" (1/1) ... [2023-11-29 06:46:59,375 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:59" (1/1) ... [2023-11-29 06:46:59,376 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:59" (1/1) ... [2023-11-29 06:46:59,377 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:59" (1/1) ... [2023-11-29 06:46:59,378 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:46:59,379 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:46:59,379 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:46:59,379 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:46:59,380 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:59" (1/1) ... [2023-11-29 06:46:59,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:46:59,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:46:59,419 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:46:59,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:46:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:46:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:46:59,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:46:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:46:59,522 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:46:59,524 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:46:59,616 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:46:59,639 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:46:59,640 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 06:46:59,640 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:46:59 BoogieIcfgContainer [2023-11-29 06:46:59,640 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:46:59,643 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:46:59,644 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:46:59,647 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:46:59,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:46:59" (1/3) ... [2023-11-29 06:46:59,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56fe0eb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:46:59, skipping insertion in model container [2023-11-29 06:46:59,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:59" (2/3) ... [2023-11-29 06:46:59,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56fe0eb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:46:59, skipping insertion in model container [2023-11-29 06:46:59,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:46:59" (3/3) ... [2023-11-29 06:46:59,650 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2023-11-29 06:46:59,669 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:46:59,670 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:46:59,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:46:59,716 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;@1c62615, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:46:59,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:46:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:59,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 06:46:59,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:46:59,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 06:46:59,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:46:59,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:46:59,730 INFO L85 PathProgramCache]: Analyzing trace with hash 56617893, now seen corresponding path program 1 times [2023-11-29 06:46:59,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:46:59,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346630280] [2023-11-29 06:46:59,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:46:59,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:46:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:46:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:46:59,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:46:59,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346630280] [2023-11-29 06:46:59,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346630280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:46:59,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:46:59,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:46:59,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959024604] [2023-11-29 06:46:59,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:46:59,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:46:59,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:46:59,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:46:59,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:46:59,970 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:59,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:46:59,995 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2023-11-29 06:46:59,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:46:59,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-29 06:46:59,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:47:00,006 INFO L225 Difference]: With dead ends: 15 [2023-11-29 06:47:00,006 INFO L226 Difference]: Without dead ends: 7 [2023-11-29 06:47:00,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:47:00,013 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:47:00,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:47:00,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2023-11-29 06:47:00,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2023-11-29 06:47:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2023-11-29 06:47:00,048 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2023-11-29 06:47:00,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:47:00,048 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2023-11-29 06:47:00,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:00,049 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2023-11-29 06:47:00,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 06:47:00,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:47:00,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 06:47:00,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:47:00,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:47:00,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:47:00,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1756820054, now seen corresponding path program 1 times [2023-11-29 06:47:00,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:47:00,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128268174] [2023-11-29 06:47:00,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:47:00,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:47:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:47:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:47:00,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:47:00,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128268174] [2023-11-29 06:47:00,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128268174] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:47:00,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530563264] [2023-11-29 06:47:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:47:00,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:47:00,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:47:00,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:47:00,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:47:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:47:00,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:47:00,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:47:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:47:00,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:47:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:47:00,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530563264] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:47:00,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:47:00,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2023-11-29 06:47:00,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026492526] [2023-11-29 06:47:00,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:47:00,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:47:00,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:47:00,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:47:00,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:47:00,394 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:00,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:47:00,511 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2023-11-29 06:47:00,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:47:00,512 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-29 06:47:00,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:47:00,513 INFO L225 Difference]: With dead ends: 18 [2023-11-29 06:47:00,513 INFO L226 Difference]: Without dead ends: 10 [2023-11-29 06:47:00,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:47:00,515 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:47:00,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 21 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:47:00,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-29 06:47:00,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-29 06:47:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-11-29 06:47:00,521 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2023-11-29 06:47:00,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:47:00,521 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-11-29 06:47:00,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:00,521 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-11-29 06:47:00,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 06:47:00,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:47:00,522 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2023-11-29 06:47:00,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:47:00,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 06:47:00,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:47:00,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:47:00,725 INFO L85 PathProgramCache]: Analyzing trace with hash 608473061, now seen corresponding path program 2 times [2023-11-29 06:47:00,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:47:00,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570905065] [2023-11-29 06:47:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:47:00,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:47:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:47:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:47:00,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:47:00,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570905065] [2023-11-29 06:47:00,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570905065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:47:00,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610614999] [2023-11-29 06:47:00,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:47:00,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:47:00,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:47:00,884 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:47:00,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:47:00,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:47:00,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:47:00,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:47:00,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:47:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:47:01,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:47:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:47:01,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610614999] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:47:01,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:47:01,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2023-11-29 06:47:01,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772988809] [2023-11-29 06:47:01,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:47:01,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:47:01,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:47:01,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:47:01,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:47:01,158 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:01,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:47:01,794 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-11-29 06:47:01,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:47:01,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 06:47:01,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:47:01,795 INFO L225 Difference]: With dead ends: 32 [2023-11-29 06:47:01,795 INFO L226 Difference]: Without dead ends: 20 [2023-11-29 06:47:01,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:47:01,797 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:47:01,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 53 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:47:01,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-29 06:47:01,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2023-11-29 06:47:01,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:01,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-11-29 06:47:01,805 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2023-11-29 06:47:01,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:47:01,805 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-11-29 06:47:01,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:01,806 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-11-29 06:47:01,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 06:47:01,806 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:47:01,806 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2023-11-29 06:47:01,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:47:02,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 06:47:02,007 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:47:02,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:47:02,008 INFO L85 PathProgramCache]: Analyzing trace with hash 680351237, now seen corresponding path program 3 times [2023-11-29 06:47:02,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:47:02,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124344837] [2023-11-29 06:47:02,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:47:02,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:47:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:47:02,033 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 06:47:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:47:02,063 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 06:47:02,063 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 06:47:02,064 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-29 06:47:02,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 06:47:02,070 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-11-29 06:47:02,074 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 06:47:02,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:47:02 BoogieIcfgContainer [2023-11-29 06:47:02,092 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 06:47:02,093 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 06:47:02,093 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 06:47:02,093 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 06:47:02,094 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:46:59" (3/4) ... [2023-11-29 06:47:02,094 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-29 06:47:02,127 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 06:47:02,127 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 06:47:02,128 INFO L158 Benchmark]: Toolchain (without parser) took 2987.99ms. Allocated memory is still 146.8MB. Free memory was 117.0MB in the beginning and 111.1MB in the end (delta: 5.9MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. [2023-11-29 06:47:02,128 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 113.2MB. Free memory is still 68.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 06:47:02,128 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.49ms. Allocated memory is still 146.8MB. Free memory was 116.8MB in the beginning and 106.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 06:47:02,129 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.40ms. Allocated memory is still 146.8MB. Free memory was 106.6MB in the beginning and 105.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 06:47:02,129 INFO L158 Benchmark]: Boogie Preprocessor took 27.95ms. Allocated memory is still 146.8MB. Free memory was 105.4MB in the beginning and 103.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 06:47:02,129 INFO L158 Benchmark]: RCFGBuilder took 261.44ms. Allocated memory is still 146.8MB. Free memory was 103.8MB in the beginning and 94.5MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-29 06:47:02,130 INFO L158 Benchmark]: TraceAbstraction took 2449.19ms. Allocated memory is still 146.8MB. Free memory was 94.0MB in the beginning and 113.2MB in the end (delta: -19.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 06:47:02,130 INFO L158 Benchmark]: Witness Printer took 34.24ms. Allocated memory is still 146.8MB. Free memory was 113.2MB in the beginning and 111.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 06:47:02,132 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 113.2MB. Free memory is still 68.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 181.49ms. Allocated memory is still 146.8MB. Free memory was 116.8MB in the beginning and 106.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.40ms. Allocated memory is still 146.8MB. Free memory was 106.6MB in the beginning and 105.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.95ms. Allocated memory is still 146.8MB. Free memory was 105.4MB in the beginning and 103.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 261.44ms. Allocated memory is still 146.8MB. Free memory was 103.8MB in the beginning and 94.5MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 2449.19ms. Allocated memory is still 146.8MB. Free memory was 94.0MB in the beginning and 113.2MB in the end (delta: -19.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 34.24ms. Allocated memory is still 146.8MB. Free memory was 113.2MB in the beginning and 111.1MB 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.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: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L13] unsigned int x = 0; [L14] unsigned int y = 1; VAL [x=0, y=1] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=1, y=2] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=2, y=4] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=3, y=8] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=4, y=16] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=5, y=32] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=6, y=64] [L16] COND FALSE !(x < 6) VAL [x=6, y=64] [L21] CALL __VERIFIER_assert(y != 64) [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.4s, OverallIterations: 4, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 32 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 32 mSDsluCounter, 83 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 70 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 149 IncrementalHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 13 mSDtfsCounter, 149 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=3, InterpolantAutomatonStates: 27, 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, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 144 SizeOfPredicates, 4 NumberOfNonLiveVariables, 91 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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! [2023-11-29 06:47:02,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e011382-0f80-4a2e-9eb7-555deed1cfc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with 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