./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX --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 bd1fbff4a3c3c5ec96d6304a0f1ce261a19e0a6955e4877484b605d93c4e6183 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:56:24,037 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:56:24,160 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 16:56:24,170 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:56:24,172 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:56:24,215 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:56:24,216 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:56:24,217 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:56:24,218 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:56:24,220 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:56:24,221 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:56:24,221 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:56:24,222 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:56:24,223 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:56:24,226 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:56:24,227 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:56:24,227 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 16:56:24,232 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:56:24,232 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:56:24,233 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:56:24,233 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:56:24,235 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 16:56:24,236 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:56:24,236 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 16:56:24,237 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:56:24,237 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:56:24,237 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 16:56:24,238 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:56:24,238 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:56:24,239 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:56:24,240 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:56:24,240 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:56:24,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:56:24,242 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:56:24,242 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:56:24,242 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 16:56:24,243 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:56:24,243 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:56:24,243 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:56:24,244 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:56:24,244 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:56:24,245 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:56:24,245 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_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd1fbff4a3c3c5ec96d6304a0f1ce261a19e0a6955e4877484b605d93c4e6183 [2024-11-08 16:56:24,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:56:24,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:56:24,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:56:24,637 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:56:24,637 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:56:24,639 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c Unable to find full path for "g++" [2024-11-08 16:56:27,025 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:56:27,355 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:56:27,356 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c [2024-11-08 16:56:27,368 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/data/9513ba7fa/456cbb9d189a444f802db040b1814498/FLAG093b25729 [2024-11-08 16:56:27,385 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/data/9513ba7fa/456cbb9d189a444f802db040b1814498 [2024-11-08 16:56:27,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:56:27,391 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:56:27,393 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:56:27,393 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:56:27,400 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:56:27,401 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:56:27" (1/1) ... [2024-11-08 16:56:27,403 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f585626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:27, skipping insertion in model container [2024-11-08 16:56:27,403 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:56:27" (1/1) ... [2024-11-08 16:56:27,459 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:56:27,686 WARN L250 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_ccf284a8-b711-4849-b094-eab7d0ae7476/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[1998,2011] [2024-11-08 16:56:27,695 WARN L250 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_ccf284a8-b711-4849-b094-eab7d0ae7476/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[2392,2405] [2024-11-08 16:56:27,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:56:27,782 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:56:27,802 WARN L250 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_ccf284a8-b711-4849-b094-eab7d0ae7476/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[1998,2011] [2024-11-08 16:56:27,804 WARN L250 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_ccf284a8-b711-4849-b094-eab7d0ae7476/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[2392,2405] [2024-11-08 16:56:27,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:56:27,879 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:56:27,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:27 WrapperNode [2024-11-08 16:56:27,880 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:56:27,882 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:56:27,882 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:56:27,882 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:56:27,892 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:27" (1/1) ... [2024-11-08 16:56:27,903 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:27" (1/1) ... [2024-11-08 16:56:27,947 INFO L138 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 211 [2024-11-08 16:56:27,948 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:56:27,949 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:56:27,949 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:56:27,949 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:56:27,965 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:27" (1/1) ... [2024-11-08 16:56:27,966 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:27" (1/1) ... [2024-11-08 16:56:27,970 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:27" (1/1) ... [2024-11-08 16:56:27,995 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]. [2024-11-08 16:56:27,995 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:27" (1/1) ... [2024-11-08 16:56:27,996 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:27" (1/1) ... [2024-11-08 16:56:28,004 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:27" (1/1) ... [2024-11-08 16:56:28,010 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:27" (1/1) ... [2024-11-08 16:56:28,013 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:27" (1/1) ... [2024-11-08 16:56:28,015 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:27" (1/1) ... [2024-11-08 16:56:28,019 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:56:28,020 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:56:28,020 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:56:28,021 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:56:28,022 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:27" (1/1) ... [2024-11-08 16:56:28,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:56:28,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:56:28,073 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:56:28,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:56:28,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 16:56:28,107 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-08 16:56:28,108 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-08 16:56:28,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 16:56:28,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:56:28,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:56:28,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 16:56:28,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 16:56:28,209 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:56:28,212 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:56:28,832 INFO L? ?]: Removed 81 outVars from TransFormulas that were not future-live. [2024-11-08 16:56:28,832 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:56:28,858 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:56:28,859 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-08 16:56:28,859 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:56:28 BoogieIcfgContainer [2024-11-08 16:56:28,860 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:56:28,863 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:56:28,864 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:56:28,868 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:56:28,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:56:27" (1/3) ... [2024-11-08 16:56:28,869 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@731c557e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:56:28, skipping insertion in model container [2024-11-08 16:56:28,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:27" (2/3) ... [2024-11-08 16:56:28,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@731c557e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:56:28, skipping insertion in model container [2024-11-08 16:56:28,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:56:28" (3/3) ... [2024-11-08 16:56:28,872 INFO L112 eAbstractionObserver]: Analyzing ICFG square_5+soft_float_1-2a.c.cil.c [2024-11-08 16:56:28,906 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:56:28,906 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-08 16:56:28,987 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:56:29,002 INFO L333 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, 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;@3ef206fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:56:29,003 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-08 16:56:29,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 92 states have (on average 1.576086956521739) internal successors, (145), 96 states have internal predecessors, (145), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 16:56:29,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-08 16:56:29,015 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:56:29,016 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:56:29,016 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 16:56:29,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:56:29,023 INFO L85 PathProgramCache]: Analyzing trace with hash -929888677, now seen corresponding path program 1 times [2024-11-08 16:56:29,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:56:29,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602574362] [2024-11-08 16:56:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:56:29,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:56:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 16:56:29,162 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-08 16:56:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 16:56:29,199 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-08 16:56:29,202 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-08 16:56:29,204 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-11-08 16:56:29,206 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-08 16:56:29,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 16:56:29,216 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-08 16:56:29,233 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-08 16:56:29,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.11 04:56:29 BoogieIcfgContainer [2024-11-08 16:56:29,236 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-08 16:56:29,237 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-08 16:56:29,238 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-08 16:56:29,238 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-08 16:56:29,239 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:56:28" (3/4) ... [2024-11-08 16:56:29,243 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-08 16:56:29,244 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-08 16:56:29,245 INFO L158 Benchmark]: Toolchain (without parser) took 1854.36ms. Allocated memory was 142.6MB in the beginning and 190.8MB in the end (delta: 48.2MB). Free memory was 109.1MB in the beginning and 145.1MB in the end (delta: -35.9MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. [2024-11-08 16:56:29,246 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 142.6MB. Free memory was 86.3MB in the beginning and 86.1MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-08 16:56:29,247 INFO L158 Benchmark]: CACSL2BoogieTranslator took 488.18ms. Allocated memory is still 142.6MB. Free memory was 108.8MB in the beginning and 92.0MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-08 16:56:29,248 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.60ms. Allocated memory is still 142.6MB. Free memory was 92.0MB in the beginning and 89.6MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-08 16:56:29,249 INFO L158 Benchmark]: Boogie Preprocessor took 70.19ms. Allocated memory is still 142.6MB. Free memory was 89.6MB in the beginning and 86.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-08 16:56:29,250 INFO L158 Benchmark]: RCFGBuilder took 839.88ms. Allocated memory was 142.6MB in the beginning and 190.8MB in the end (delta: 48.2MB). Free memory was 86.5MB in the beginning and 157.1MB in the end (delta: -70.5MB). Peak memory consumption was 28.4MB. Max. memory is 16.1GB. [2024-11-08 16:56:29,250 INFO L158 Benchmark]: TraceAbstraction took 373.20ms. Allocated memory is still 190.8MB. Free memory was 156.4MB in the beginning and 145.1MB in the end (delta: 11.3MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. [2024-11-08 16:56:29,251 INFO L158 Benchmark]: Witness Printer took 6.86ms. Allocated memory is still 190.8MB. Free memory is still 145.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-08 16:56:29,255 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 142.6MB. Free memory was 86.3MB in the beginning and 86.1MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 488.18ms. Allocated memory is still 142.6MB. Free memory was 108.8MB in the beginning and 92.0MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.60ms. Allocated memory is still 142.6MB. Free memory was 92.0MB in the beginning and 89.6MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 70.19ms. Allocated memory is still 142.6MB. Free memory was 89.6MB in the beginning and 86.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 839.88ms. Allocated memory was 142.6MB in the beginning and 190.8MB in the end (delta: 48.2MB). Free memory was 86.5MB in the beginning and 157.1MB in the end (delta: -70.5MB). Peak memory consumption was 28.4MB. Max. memory is 16.1GB. * TraceAbstraction took 373.20ms. Allocated memory is still 190.8MB. Free memory was 156.4MB in the beginning and 145.1MB in the end (delta: 11.3MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. * Witness Printer took 6.86ms. Allocated memory is still 190.8MB. Free memory is still 145.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L403] COND TRUE __VERIFIER_nondet_int() [L404] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L47] COND TRUE !(result >= 0.0f && result < 1.3985f) [L48] reach_error() - UnprovableResult [Line: 61]: 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 3 procedures, 105 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-08 16:56:29,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX --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 bd1fbff4a3c3c5ec96d6304a0f1ce261a19e0a6955e4877484b605d93c4e6183 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:56:32,024 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:56:32,156 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-08 16:56:32,167 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:56:32,168 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:56:32,215 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:56:32,217 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:56:32,217 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:56:32,218 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:56:32,220 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:56:32,221 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:56:32,221 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:56:32,222 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:56:32,223 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:56:32,223 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:56:32,224 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:56:32,226 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 16:56:32,230 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:56:32,230 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:56:32,231 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:56:32,231 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 16:56:32,232 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:56:32,232 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 16:56:32,233 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 16:56:32,233 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-08 16:56:32,233 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:56:32,234 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-08 16:56:32,234 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:56:32,234 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 16:56:32,235 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:56:32,235 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:56:32,235 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:56:32,236 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:56:32,236 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:56:32,236 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:56:32,237 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:56:32,238 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:56:32,239 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 16:56:32,239 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-08 16:56:32,239 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-08 16:56:32,240 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:56:32,241 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:56:32,242 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:56:32,242 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:56:32,243 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_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd1fbff4a3c3c5ec96d6304a0f1ce261a19e0a6955e4877484b605d93c4e6183 [2024-11-08 16:56:32,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:56:32,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:56:32,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:56:32,773 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:56:32,774 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:56:32,776 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c Unable to find full path for "g++" [2024-11-08 16:56:35,358 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:56:35,733 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:56:35,734 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c [2024-11-08 16:56:35,746 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/data/1127d3dd8/cd7a813941e94c0abdbad043dec06d10/FLAG954df9b6b [2024-11-08 16:56:35,763 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/data/1127d3dd8/cd7a813941e94c0abdbad043dec06d10 [2024-11-08 16:56:35,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:56:35,768 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:56:35,770 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:56:35,770 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:56:35,777 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:56:35,778 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:56:35" (1/1) ... [2024-11-08 16:56:35,780 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ded7fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:35, skipping insertion in model container [2024-11-08 16:56:35,780 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:56:35" (1/1) ... [2024-11-08 16:56:35,824 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:56:36,083 WARN L250 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_ccf284a8-b711-4849-b094-eab7d0ae7476/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[1998,2011] [2024-11-08 16:56:36,091 WARN L250 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_ccf284a8-b711-4849-b094-eab7d0ae7476/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[2392,2405] [2024-11-08 16:56:36,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:56:36,266 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:56:36,296 WARN L250 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_ccf284a8-b711-4849-b094-eab7d0ae7476/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[1998,2011] [2024-11-08 16:56:36,303 WARN L250 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_ccf284a8-b711-4849-b094-eab7d0ae7476/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[2392,2405] [2024-11-08 16:56:36,375 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:56:36,401 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:56:36,401 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:36 WrapperNode [2024-11-08 16:56:36,402 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:56:36,403 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:56:36,403 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:56:36,403 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:56:36,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:36" (1/1) ... [2024-11-08 16:56:36,435 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:36" (1/1) ... [2024-11-08 16:56:36,478 INFO L138 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 168 [2024-11-08 16:56:36,478 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:56:36,479 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:56:36,479 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:56:36,479 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:56:36,500 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:36" (1/1) ... [2024-11-08 16:56:36,500 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:36" (1/1) ... [2024-11-08 16:56:36,509 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:36" (1/1) ... [2024-11-08 16:56:36,540 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]. [2024-11-08 16:56:36,540 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:36" (1/1) ... [2024-11-08 16:56:36,541 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:36" (1/1) ... [2024-11-08 16:56:36,563 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:36" (1/1) ... [2024-11-08 16:56:36,576 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:36" (1/1) ... [2024-11-08 16:56:36,581 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:36" (1/1) ... [2024-11-08 16:56:36,583 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:36" (1/1) ... [2024-11-08 16:56:36,588 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:56:36,593 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:56:36,593 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:56:36,593 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:56:36,594 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:36" (1/1) ... [2024-11-08 16:56:36,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:56:36,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:56:36,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:56:36,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:56:36,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 16:56:36,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-08 16:56:36,688 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-08 16:56:36,688 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-08 16:56:36,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:56:36,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:56:36,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 16:56:36,693 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 16:56:36,826 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:56:36,829 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:56:41,633 INFO L? ?]: Removed 65 outVars from TransFormulas that were not future-live. [2024-11-08 16:56:41,635 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:56:41,664 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:56:41,664 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-08 16:56:41,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:56:41 BoogieIcfgContainer [2024-11-08 16:56:41,665 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:56:41,670 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:56:41,670 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:56:41,676 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:56:41,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:56:35" (1/3) ... [2024-11-08 16:56:41,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c207c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:56:41, skipping insertion in model container [2024-11-08 16:56:41,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:56:36" (2/3) ... [2024-11-08 16:56:41,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c207c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:56:41, skipping insertion in model container [2024-11-08 16:56:41,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:56:41" (3/3) ... [2024-11-08 16:56:41,683 INFO L112 eAbstractionObserver]: Analyzing ICFG square_5+soft_float_1-2a.c.cil.c [2024-11-08 16:56:41,706 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:56:41,707 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-08 16:56:41,782 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:56:41,790 INFO L333 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, 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;@44d6069f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:56:41,791 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-08 16:56:41,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 16:56:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-08 16:56:41,805 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:56:41,806 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:56:41,807 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 16:56:41,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:56:41,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1912677092, now seen corresponding path program 1 times [2024-11-08 16:56:41,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:56:41,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572361170] [2024-11-08 16:56:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:56:41,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 16:56:41,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/mathsat [2024-11-08 16:56:41,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-08 16:56:41,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-08 16:56:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:56:42,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-08 16:56:42,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:56:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:56:42,467 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:56:42,468 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 16:56:42,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572361170] [2024-11-08 16:56:42,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572361170] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:56:42,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:56:42,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:56:42,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927921763] [2024-11-08 16:56:42,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:56:42,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 16:56:42,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 16:56:42,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 16:56:42,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 16:56:42,512 INFO L87 Difference]: Start difference. First operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2024-11-08 16:56:42,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:56:42,554 INFO L93 Difference]: Finished difference Result 157 states and 248 transitions. [2024-11-08 16:56:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 16:56:42,557 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) Word has length 7 [2024-11-08 16:56:42,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:56:42,571 INFO L225 Difference]: With dead ends: 157 [2024-11-08 16:56:42,572 INFO L226 Difference]: Without dead ends: 74 [2024-11-08 16:56:42,577 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 16:56:42,583 INFO L432 NwaCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:56:42,588 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:56:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-08 16:56:42,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-08 16:56:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 65 states have internal predecessors, (92), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 16:56:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 107 transitions. [2024-11-08 16:56:42,655 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 107 transitions. Word has length 7 [2024-11-08 16:56:42,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:56:42,658 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 107 transitions. [2024-11-08 16:56:42,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2024-11-08 16:56:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 107 transitions. [2024-11-08 16:56:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-08 16:56:42,659 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:56:42,659 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:56:42,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-11-08 16:56:42,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 16:56:42,861 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 16:56:42,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:56:42,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1912736674, now seen corresponding path program 1 times [2024-11-08 16:56:42,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 16:56:42,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274736910] [2024-11-08 16:56:42,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:56:42,894 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 16:56:42,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/mathsat [2024-11-08 16:56:42,899 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-08 16:56:42,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-08 17:04:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:04:09,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 17:04:09,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:04:18,219 WARN L286 SmtUtils]: Spent 8.24s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-08 17:04:26,344 WARN L286 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-08 17:04:32,848 WARN L286 SmtUtils]: Spent 6.50s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-08 17:04:36,949 WARN L851 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) |c_ULTIMATE.start_main1_~result~0#1|)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2024-11-08 17:04:53,332 WARN L286 SmtUtils]: Spent 8.24s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-08 17:05:00,269 WARN L286 SmtUtils]: Spent 6.94s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-08 17:05:08,381 WARN L286 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-08 17:05:20,751 WARN L286 SmtUtils]: Spent 8.31s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-08 17:05:26,960 WARN L286 SmtUtils]: Spent 6.21s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-08 17:05:35,085 WARN L286 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-08 17:05:39,189 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 2797.0 2000.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from false [2024-11-08 17:05:43,241 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 2797.0 2000.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from true [2024-11-08 17:05:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:05:43,242 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:05:43,243 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:05:43,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274736910] [2024-11-08 17:05:43,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274736910] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:05:43,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:05:43,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 17:05:43,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125856604] [2024-11-08 17:05:43,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:05:43,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 17:05:43,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:05:43,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 17:05:43,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-08 17:05:43,247 INFO L87 Difference]: Start difference. First operand 74 states and 107 transitions. Second 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) [2024-11-08 17:05:47,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 17:05:51,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 17:05:55,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 17:05:56,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:05:56,044 INFO L93 Difference]: Finished difference Result 74 states and 107 transitions. [2024-11-08 17:05:56,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:05:56,045 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 7 [2024-11-08 17:05:56,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:05:56,047 INFO L225 Difference]: With dead ends: 74 [2024-11-08 17:05:56,047 INFO L226 Difference]: Without dead ends: 69 [2024-11-08 17:05:56,048 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-08 17:05:56,049 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 101 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2024-11-08 17:05:56,050 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 274 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 3 Unknown, 214 Unchecked, 12.8s Time] [2024-11-08 17:05:56,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-08 17:05:56,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-08 17:05:56,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.5) internal successors, (87), 60 states have internal predecessors, (87), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 17:05:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2024-11-08 17:05:56,061 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 7 [2024-11-08 17:05:56,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:05:56,062 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2024-11-08 17:05:56,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2024-11-08 17:05:56,062 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2024-11-08 17:05:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-08 17:05:56,064 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:05:56,064 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:05:56,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-11-08 17:05:56,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-08 17:05:56,265 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:05:56,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:05:56,266 INFO L85 PathProgramCache]: Analyzing trace with hash -549432071, now seen corresponding path program 1 times [2024-11-08 17:05:56,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:05:56,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433957000] [2024-11-08 17:05:56,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:05:56,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:05:56,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:05:56,269 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:05:56,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 17:05:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:05:56,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 17:05:56,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:05:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 17:05:57,176 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:05:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 17:05:57,737 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:05:57,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433957000] [2024-11-08 17:05:57,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433957000] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:05:57,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:05:57,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-08 17:05:57,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053082399] [2024-11-08 17:05:57,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:05:57,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 17:05:57,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:05:57,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 17:05:57,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-08 17:05:57,745 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 17:05:59,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:05:59,488 INFO L93 Difference]: Finished difference Result 146 states and 224 transitions. [2024-11-08 17:05:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 17:05:59,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-11-08 17:05:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:05:59,492 INFO L225 Difference]: With dead ends: 146 [2024-11-08 17:05:59,492 INFO L226 Difference]: Without dead ends: 101 [2024-11-08 17:05:59,493 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-08 17:05:59,495 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 31 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-08 17:05:59,495 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 597 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-08 17:05:59,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-08 17:05:59,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2024-11-08 17:05:59,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 87 states have internal predecessors, (123), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-08 17:05:59,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 148 transitions. [2024-11-08 17:05:59,517 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 148 transitions. Word has length 33 [2024-11-08 17:05:59,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:05:59,518 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 148 transitions. [2024-11-08 17:05:59,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 17:05:59,518 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 148 transitions. [2024-11-08 17:05:59,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-08 17:05:59,520 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:05:59,520 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:05:59,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 17:05:59,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:05:59,724 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:05:59,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:05:59,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1528596169, now seen corresponding path program 1 times [2024-11-08 17:05:59,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:05:59,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205126106] [2024-11-08 17:05:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:05:59,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:05:59,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:05:59,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:05:59,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 17:05:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:05:59,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 17:05:59,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 17:06:01,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:06:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 17:06:01,994 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:01,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205126106] [2024-11-08 17:06:01,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205126106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:06:01,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:06:01,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2024-11-08 17:06:01,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704460374] [2024-11-08 17:06:01,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:06:01,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:06:01,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:01,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:06:01,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:06:01,997 INFO L87 Difference]: Start difference. First operand 99 states and 148 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-08 17:06:04,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:04,902 INFO L93 Difference]: Finished difference Result 231 states and 366 transitions. [2024-11-08 17:06:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 17:06:04,903 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2024-11-08 17:06:04,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:04,905 INFO L225 Difference]: With dead ends: 231 [2024-11-08 17:06:04,906 INFO L226 Difference]: Without dead ends: 165 [2024-11-08 17:06:04,907 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:06:04,908 INFO L432 NwaCegarLoop]: 142 mSDtfsCounter, 60 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:04,909 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1050 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-08 17:06:04,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-08 17:06:04,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 127. [2024-11-08 17:06:04,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 106 states have (on average 1.3773584905660377) internal successors, (146), 106 states have internal predecessors, (146), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (33), 20 states have call predecessors, (33), 15 states have call successors, (33) [2024-11-08 17:06:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 195 transitions. [2024-11-08 17:06:04,943 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 195 transitions. Word has length 37 [2024-11-08 17:06:04,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:04,947 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 195 transitions. [2024-11-08 17:06:04,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-08 17:06:04,948 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 195 transitions. [2024-11-08 17:06:04,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-08 17:06:04,950 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:04,950 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:04,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 17:06:05,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:05,151 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:05,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:05,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1466896535, now seen corresponding path program 1 times [2024-11-08 17:06:05,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:05,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617504463] [2024-11-08 17:06:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:05,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:05,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:05,154 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:05,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 17:06:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:05,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 17:06:05,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 17:06:06,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:06:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 17:06:08,200 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:08,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617504463] [2024-11-08 17:06:08,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617504463] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 17:06:08,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:06:08,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2024-11-08 17:06:08,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671392901] [2024-11-08 17:06:08,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:08,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 17:06:08,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:08,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 17:06:08,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:06:08,203 INFO L87 Difference]: Start difference. First operand 127 states and 195 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:10,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:10,131 INFO L93 Difference]: Finished difference Result 257 states and 388 transitions. [2024-11-08 17:06:10,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:06:10,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2024-11-08 17:06:10,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:10,136 INFO L225 Difference]: With dead ends: 257 [2024-11-08 17:06:10,136 INFO L226 Difference]: Without dead ends: 202 [2024-11-08 17:06:10,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-08 17:06:10,139 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 39 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:10,141 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 437 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-08 17:06:10,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-08 17:06:10,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2024-11-08 17:06:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 139 states have (on average 1.3453237410071943) internal successors, (187), 133 states have internal predecessors, (187), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (33), 26 states have call predecessors, (33), 15 states have call successors, (33) [2024-11-08 17:06:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 236 transitions. [2024-11-08 17:06:10,181 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 236 transitions. Word has length 41 [2024-11-08 17:06:10,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:10,181 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 236 transitions. [2024-11-08 17:06:10,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:10,182 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 236 transitions. [2024-11-08 17:06:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-08 17:06:10,188 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:10,189 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:10,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 17:06:10,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:10,389 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:10,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:10,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1409638233, now seen corresponding path program 1 times [2024-11-08 17:06:10,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:10,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760866766] [2024-11-08 17:06:10,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:10,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:10,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:10,394 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:10,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 17:06:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:10,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 17:06:10,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 17:06:11,172 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:06:11,172 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:11,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760866766] [2024-11-08 17:06:11,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760866766] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:06:11,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:06:11,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-08 17:06:11,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078454832] [2024-11-08 17:06:11,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:11,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 17:06:11,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:11,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 17:06:11,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:06:11,176 INFO L87 Difference]: Start difference. First operand 160 states and 236 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:12,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:12,394 INFO L93 Difference]: Finished difference Result 259 states and 386 transitions. [2024-11-08 17:06:12,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:06:12,395 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2024-11-08 17:06:12,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:12,397 INFO L225 Difference]: With dead ends: 259 [2024-11-08 17:06:12,397 INFO L226 Difference]: Without dead ends: 198 [2024-11-08 17:06:12,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-08 17:06:12,399 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 33 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:12,400 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 517 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 17:06:12,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-08 17:06:12,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2024-11-08 17:06:12,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 171 states have (on average 1.3508771929824561) internal successors, (231), 167 states have internal predecessors, (231), 20 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (37), 30 states have call predecessors, (37), 19 states have call successors, (37) [2024-11-08 17:06:12,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 288 transitions. [2024-11-08 17:06:12,442 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 288 transitions. Word has length 41 [2024-11-08 17:06:12,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:12,442 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 288 transitions. [2024-11-08 17:06:12,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 288 transitions. [2024-11-08 17:06:12,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-08 17:06:12,447 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:12,449 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:12,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 17:06:12,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:12,650 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:12,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash 728518674, now seen corresponding path program 1 times [2024-11-08 17:06:12,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:12,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450252644] [2024-11-08 17:06:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:12,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:12,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:12,653 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:12,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 17:06:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:12,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 17:06:12,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 17:06:13,045 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:06:13,045 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:13,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450252644] [2024-11-08 17:06:13,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450252644] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:06:13,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:06:13,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:06:13,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375348459] [2024-11-08 17:06:13,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:13,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:06:13,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:13,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:06:13,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:06:13,047 INFO L87 Difference]: Start difference. First operand 196 states and 288 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:13,216 INFO L93 Difference]: Finished difference Result 317 states and 467 transitions. [2024-11-08 17:06:13,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:06:13,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-08 17:06:13,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:13,220 INFO L225 Difference]: With dead ends: 317 [2024-11-08 17:06:13,220 INFO L226 Difference]: Without dead ends: 251 [2024-11-08 17:06:13,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:06:13,222 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 15 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:13,223 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 344 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 17:06:13,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-08 17:06:13,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2024-11-08 17:06:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 224 states have (on average 1.3214285714285714) internal successors, (296), 220 states have internal predecessors, (296), 22 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (39), 32 states have call predecessors, (39), 21 states have call successors, (39) [2024-11-08 17:06:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 357 transitions. [2024-11-08 17:06:13,241 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 357 transitions. Word has length 44 [2024-11-08 17:06:13,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:13,242 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 357 transitions. [2024-11-08 17:06:13,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:13,243 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 357 transitions. [2024-11-08 17:06:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-08 17:06:13,245 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:13,245 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:13,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 17:06:13,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:13,446 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:13,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:13,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1141622334, now seen corresponding path program 1 times [2024-11-08 17:06:13,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:13,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124295088] [2024-11-08 17:06:13,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:13,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:13,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:13,450 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:13,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 17:06:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:13,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 17:06:13,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 17:06:13,780 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:06:13,781 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:13,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124295088] [2024-11-08 17:06:13,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124295088] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:06:13,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:06:13,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:06:13,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697621587] [2024-11-08 17:06:13,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:13,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:06:13,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:13,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:06:13,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:06:13,784 INFO L87 Difference]: Start difference. First operand 251 states and 357 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 17:06:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:14,197 INFO L93 Difference]: Finished difference Result 437 states and 618 transitions. [2024-11-08 17:06:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:06:14,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-11-08 17:06:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:14,200 INFO L225 Difference]: With dead ends: 437 [2024-11-08 17:06:14,200 INFO L226 Difference]: Without dead ends: 190 [2024-11-08 17:06:14,201 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:06:14,202 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 26 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:14,202 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 261 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 17:06:14,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-08 17:06:14,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 178. [2024-11-08 17:06:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 158 states have (on average 1.2848101265822784) internal successors, (203), 159 states have internal predecessors, (203), 14 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (25), 18 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-08 17:06:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 242 transitions. [2024-11-08 17:06:14,230 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 242 transitions. Word has length 44 [2024-11-08 17:06:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:14,230 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 242 transitions. [2024-11-08 17:06:14,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 17:06:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 242 transitions. [2024-11-08 17:06:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-08 17:06:14,232 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:14,233 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:14,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 17:06:14,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:14,433 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:14,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:14,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1015579738, now seen corresponding path program 1 times [2024-11-08 17:06:14,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:14,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720441647] [2024-11-08 17:06:14,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:14,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:14,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:14,436 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:14,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 17:06:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:14,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 17:06:14,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 17:06:14,676 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:06:14,676 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:14,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720441647] [2024-11-08 17:06:14,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720441647] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:06:14,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:06:14,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:06:14,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101588770] [2024-11-08 17:06:14,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:14,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:06:14,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:14,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:06:14,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:06:14,679 INFO L87 Difference]: Start difference. First operand 178 states and 242 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:14,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:14,820 INFO L93 Difference]: Finished difference Result 189 states and 254 transitions. [2024-11-08 17:06:14,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:06:14,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-08 17:06:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:14,823 INFO L225 Difference]: With dead ends: 189 [2024-11-08 17:06:14,824 INFO L226 Difference]: Without dead ends: 182 [2024-11-08 17:06:14,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:06:14,825 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 0 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:14,825 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 288 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:06:14,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-08 17:06:14,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2024-11-08 17:06:14,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 162 states have (on average 1.2777777777777777) internal successors, (207), 163 states have internal predecessors, (207), 14 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (25), 18 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-08 17:06:14,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 246 transitions. [2024-11-08 17:06:14,838 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 246 transitions. Word has length 45 [2024-11-08 17:06:14,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:14,838 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 246 transitions. [2024-11-08 17:06:14,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:14,839 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 246 transitions. [2024-11-08 17:06:14,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-08 17:06:14,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:14,840 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:14,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 17:06:15,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:15,044 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:15,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:15,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1504380196, now seen corresponding path program 1 times [2024-11-08 17:06:15,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:15,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119253383] [2024-11-08 17:06:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:15,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:15,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:15,047 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:15,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 17:06:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:15,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 17:06:15,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 17:06:15,376 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:06:15,376 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:15,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119253383] [2024-11-08 17:06:15,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119253383] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:06:15,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:06:15,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 17:06:15,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078623603] [2024-11-08 17:06:15,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:15,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:06:15,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:15,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:06:15,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:06:15,380 INFO L87 Difference]: Start difference. First operand 182 states and 246 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:15,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:15,615 INFO L93 Difference]: Finished difference Result 189 states and 252 transitions. [2024-11-08 17:06:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:06:15,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-08 17:06:15,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:15,617 INFO L225 Difference]: With dead ends: 189 [2024-11-08 17:06:15,618 INFO L226 Difference]: Without dead ends: 182 [2024-11-08 17:06:15,618 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:06:15,619 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 3 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:15,619 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 383 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 17:06:15,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-08 17:06:15,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2024-11-08 17:06:15,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 158 states have (on average 1.2658227848101267) internal successors, (200), 159 states have internal predecessors, (200), 14 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (25), 18 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-08 17:06:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 239 transitions. [2024-11-08 17:06:15,631 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 239 transitions. Word has length 45 [2024-11-08 17:06:15,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:15,632 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 239 transitions. [2024-11-08 17:06:15,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:15,632 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 239 transitions. [2024-11-08 17:06:15,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-08 17:06:15,633 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:15,634 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:15,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 17:06:15,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:15,834 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:15,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:15,835 INFO L85 PathProgramCache]: Analyzing trace with hash -2051114471, now seen corresponding path program 2 times [2024-11-08 17:06:15,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:15,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334399778] [2024-11-08 17:06:15,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:06:15,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:15,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:15,837 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:15,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 17:06:15,894 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 17:06:15,894 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:06:15,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 17:06:15,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 17:06:17,303 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:06:17,304 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:17,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334399778] [2024-11-08 17:06:17,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334399778] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:06:17,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:06:17,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-08 17:06:17,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073005086] [2024-11-08 17:06:17,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:17,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 17:06:17,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:17,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 17:06:17,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-08 17:06:17,307 INFO L87 Difference]: Start difference. First operand 178 states and 239 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:20,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:20,519 INFO L93 Difference]: Finished difference Result 304 states and 411 transitions. [2024-11-08 17:06:20,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 17:06:20,520 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-08 17:06:20,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:20,522 INFO L225 Difference]: With dead ends: 304 [2024-11-08 17:06:20,522 INFO L226 Difference]: Without dead ends: 265 [2024-11-08 17:06:20,523 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-08 17:06:20,524 INFO L432 NwaCegarLoop]: 126 mSDtfsCounter, 57 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:20,524 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1184 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-08 17:06:20,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-11-08 17:06:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 261. [2024-11-08 17:06:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 234 states have (on average 1.2777777777777777) internal successors, (299), 233 states have internal predecessors, (299), 20 states have call successors, (20), 3 states have call predecessors, (20), 6 states have return successors, (31), 27 states have call predecessors, (31), 19 states have call successors, (31) [2024-11-08 17:06:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 350 transitions. [2024-11-08 17:06:20,552 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 350 transitions. Word has length 45 [2024-11-08 17:06:20,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:20,552 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 350 transitions. [2024-11-08 17:06:20,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:20,553 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 350 transitions. [2024-11-08 17:06:20,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-08 17:06:20,554 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:20,554 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:20,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 17:06:20,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:20,755 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:20,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:20,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1132557739, now seen corresponding path program 1 times [2024-11-08 17:06:20,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:20,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867036790] [2024-11-08 17:06:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:20,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:20,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:20,757 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:20,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 17:06:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:20,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 17:06:20,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 17:06:21,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:06:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 17:06:21,950 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:21,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867036790] [2024-11-08 17:06:21,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867036790] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:06:21,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:06:21,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2024-11-08 17:06:21,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655545809] [2024-11-08 17:06:21,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:06:21,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 17:06:21,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:21,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 17:06:21,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:06:21,953 INFO L87 Difference]: Start difference. First operand 261 states and 350 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 17:06:23,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:23,225 INFO L93 Difference]: Finished difference Result 438 states and 613 transitions. [2024-11-08 17:06:23,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:06:23,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-11-08 17:06:23,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:23,229 INFO L225 Difference]: With dead ends: 438 [2024-11-08 17:06:23,229 INFO L226 Difference]: Without dead ends: 352 [2024-11-08 17:06:23,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-08 17:06:23,231 INFO L432 NwaCegarLoop]: 130 mSDtfsCounter, 46 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:23,232 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 721 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 17:06:23,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2024-11-08 17:06:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2024-11-08 17:06:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 311 states have (on average 1.2990353697749195) internal successors, (404), 313 states have internal predecessors, (404), 30 states have call successors, (30), 3 states have call predecessors, (30), 6 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-08 17:06:23,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 475 transitions. [2024-11-08 17:06:23,261 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 475 transitions. Word has length 45 [2024-11-08 17:06:23,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:23,261 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 475 transitions. [2024-11-08 17:06:23,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 17:06:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 475 transitions. [2024-11-08 17:06:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-08 17:06:23,263 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:23,263 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:23,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-08 17:06:23,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:23,464 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:23,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:23,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1075299437, now seen corresponding path program 1 times [2024-11-08 17:06:23,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:23,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252401260] [2024-11-08 17:06:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:23,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:23,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:23,466 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:23,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 17:06:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:23,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 17:06:23,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 17:06:24,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:06:26,971 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:26,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252401260] [2024-11-08 17:06:26,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252401260] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:06:26,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [910163967] [2024-11-08 17:06:26,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:26,972 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-08 17:06:26,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 [2024-11-08 17:06:26,975 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-08 17:06:26,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-11-08 17:06:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:27,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 17:06:27,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 17:06:27,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:06:28,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [910163967] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:06:28,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:06:28,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-08 17:06:28,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99053777] [2024-11-08 17:06:28,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:06:28,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 17:06:28,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:28,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 17:06:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2024-11-08 17:06:28,125 INFO L87 Difference]: Start difference. First operand 348 states and 475 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 17:06:30,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:30,671 INFO L93 Difference]: Finished difference Result 362 states and 487 transitions. [2024-11-08 17:06:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 17:06:30,690 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-11-08 17:06:30,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:30,692 INFO L225 Difference]: With dead ends: 362 [2024-11-08 17:06:30,693 INFO L226 Difference]: Without dead ends: 360 [2024-11-08 17:06:30,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-08 17:06:30,694 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 48 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:30,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 920 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-08 17:06:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2024-11-08 17:06:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 356. [2024-11-08 17:06:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 317 states have (on average 1.2933753943217665) internal successors, (410), 319 states have internal predecessors, (410), 30 states have call successors, (30), 5 states have call predecessors, (30), 8 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-08 17:06:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 481 transitions. [2024-11-08 17:06:30,722 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 481 transitions. Word has length 45 [2024-11-08 17:06:30,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:30,723 INFO L471 AbstractCegarLoop]: Abstraction has 356 states and 481 transitions. [2024-11-08 17:06:30,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 17:06:30,724 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 481 transitions. [2024-11-08 17:06:30,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-08 17:06:30,726 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:30,726 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:30,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2024-11-08 17:06:30,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 17:06:31,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:31,127 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:31,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:31,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1246282599, now seen corresponding path program 1 times [2024-11-08 17:06:31,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:31,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746960002] [2024-11-08 17:06:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:31,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:31,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:31,129 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:31,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 17:06:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:31,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 17:06:31,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-08 17:06:31,881 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:06:31,881 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:31,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746960002] [2024-11-08 17:06:31,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746960002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:06:31,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:06:31,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 17:06:31,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586579762] [2024-11-08 17:06:31,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:31,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:06:31,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:31,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:06:31,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:06:31,884 INFO L87 Difference]: Start difference. First operand 356 states and 481 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:33,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:33,116 INFO L93 Difference]: Finished difference Result 377 states and 506 transitions. [2024-11-08 17:06:33,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:06:33,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-08 17:06:33,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:33,119 INFO L225 Difference]: With dead ends: 377 [2024-11-08 17:06:33,120 INFO L226 Difference]: Without dead ends: 375 [2024-11-08 17:06:33,120 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:06:33,122 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 3 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:33,123 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 475 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-08 17:06:33,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-08 17:06:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 364. [2024-11-08 17:06:33,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 322 states have (on average 1.295031055900621) internal successors, (417), 326 states have internal predecessors, (417), 32 states have call successors, (32), 6 states have call predecessors, (32), 9 states have return successors, (43), 37 states have call predecessors, (43), 31 states have call successors, (43) [2024-11-08 17:06:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 492 transitions. [2024-11-08 17:06:33,173 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 492 transitions. Word has length 45 [2024-11-08 17:06:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:33,173 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 492 transitions. [2024-11-08 17:06:33,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 492 transitions. [2024-11-08 17:06:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-08 17:06:33,175 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:33,175 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:33,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-08 17:06:33,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:33,377 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:33,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:33,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1189024297, now seen corresponding path program 1 times [2024-11-08 17:06:33,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:33,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945239307] [2024-11-08 17:06:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:33,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:33,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:33,379 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:33,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 17:06:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:33,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 17:06:33,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-08 17:06:34,210 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:06:34,210 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:34,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945239307] [2024-11-08 17:06:34,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945239307] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:06:34,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:06:34,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 17:06:34,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156443339] [2024-11-08 17:06:34,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:34,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:06:34,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:34,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:06:34,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:06:34,212 INFO L87 Difference]: Start difference. First operand 364 states and 492 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:35,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:35,181 INFO L93 Difference]: Finished difference Result 370 states and 497 transitions. [2024-11-08 17:06:35,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:06:35,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-08 17:06:35,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:35,184 INFO L225 Difference]: With dead ends: 370 [2024-11-08 17:06:35,184 INFO L226 Difference]: Without dead ends: 368 [2024-11-08 17:06:35,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:06:35,186 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:35,186 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 455 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-08 17:06:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-11-08 17:06:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 360. [2024-11-08 17:06:35,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 320 states have (on average 1.290625) internal successors, (413), 322 states have internal predecessors, (413), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-08 17:06:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 484 transitions. [2024-11-08 17:06:35,213 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 484 transitions. Word has length 45 [2024-11-08 17:06:35,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:35,213 INFO L471 AbstractCegarLoop]: Abstraction has 360 states and 484 transitions. [2024-11-08 17:06:35,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 484 transitions. [2024-11-08 17:06:35,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-08 17:06:35,215 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:35,216 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:35,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-08 17:06:35,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:35,416 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:35,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:35,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1891124004, now seen corresponding path program 1 times [2024-11-08 17:06:35,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:35,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289743204] [2024-11-08 17:06:35,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:35,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:35,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:35,418 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:35,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 17:06:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:35,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 17:06:35,481 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 17:06:35,813 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:06:35,814 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:35,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289743204] [2024-11-08 17:06:35,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289743204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:06:35,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:06:35,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:06:35,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376922047] [2024-11-08 17:06:35,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:35,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:06:35,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:35,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:06:35,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:06:35,817 INFO L87 Difference]: Start difference. First operand 360 states and 484 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:36,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:36,008 INFO L93 Difference]: Finished difference Result 592 states and 817 transitions. [2024-11-08 17:06:36,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:06:36,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2024-11-08 17:06:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:36,011 INFO L225 Difference]: With dead ends: 592 [2024-11-08 17:06:36,011 INFO L226 Difference]: Without dead ends: 500 [2024-11-08 17:06:36,012 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:06:36,013 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 28 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:36,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 289 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 17:06:36,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2024-11-08 17:06:36,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 413. [2024-11-08 17:06:36,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 369 states have (on average 1.2899728997289972) internal successors, (476), 369 states have internal predecessors, (476), 34 states have call successors, (34), 6 states have call predecessors, (34), 9 states have return successors, (45), 41 states have call predecessors, (45), 33 states have call successors, (45) [2024-11-08 17:06:36,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 555 transitions. [2024-11-08 17:06:36,041 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 555 transitions. Word has length 46 [2024-11-08 17:06:36,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:36,042 INFO L471 AbstractCegarLoop]: Abstraction has 413 states and 555 transitions. [2024-11-08 17:06:36,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:36,042 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 555 transitions. [2024-11-08 17:06:36,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-08 17:06:36,043 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:36,043 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:36,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-08 17:06:36,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:36,244 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:36,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:36,245 INFO L85 PathProgramCache]: Analyzing trace with hash 807338949, now seen corresponding path program 1 times [2024-11-08 17:06:36,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:36,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479174232] [2024-11-08 17:06:36,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:36,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:36,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:36,248 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:36,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-08 17:06:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:36,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:06:36,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 17:06:37,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:06:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 17:06:39,026 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:39,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479174232] [2024-11-08 17:06:39,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479174232] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 17:06:39,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:06:39,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-08 17:06:39,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713481300] [2024-11-08 17:06:39,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:39,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:06:39,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:39,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:06:39,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:06:39,029 INFO L87 Difference]: Start difference. First operand 413 states and 555 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:40,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:40,752 INFO L93 Difference]: Finished difference Result 604 states and 829 transitions. [2024-11-08 17:06:40,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:06:40,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-08 17:06:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:40,757 INFO L225 Difference]: With dead ends: 604 [2024-11-08 17:06:40,757 INFO L226 Difference]: Without dead ends: 564 [2024-11-08 17:06:40,758 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:06:40,759 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 23 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:40,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 374 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-08 17:06:40,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2024-11-08 17:06:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 445. [2024-11-08 17:06:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 395 states have (on average 1.2835443037974683) internal successors, (507), 395 states have internal predecessors, (507), 40 states have call successors, (40), 6 states have call predecessors, (40), 9 states have return successors, (51), 47 states have call predecessors, (51), 39 states have call successors, (51) [2024-11-08 17:06:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 598 transitions. [2024-11-08 17:06:40,798 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 598 transitions. Word has length 49 [2024-11-08 17:06:40,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:40,799 INFO L471 AbstractCegarLoop]: Abstraction has 445 states and 598 transitions. [2024-11-08 17:06:40,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:40,799 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 598 transitions. [2024-11-08 17:06:40,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-08 17:06:40,801 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:40,801 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:40,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-08 17:06:41,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:41,002 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:41,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:41,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1508403527, now seen corresponding path program 1 times [2024-11-08 17:06:41,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:41,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935801441] [2024-11-08 17:06:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:41,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:41,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:41,004 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:41,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-08 17:06:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:41,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 17:06:41,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 17:06:41,209 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:06:41,210 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:41,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935801441] [2024-11-08 17:06:41,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935801441] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:06:41,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:06:41,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:06:41,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56073125] [2024-11-08 17:06:41,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:41,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:06:41,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:41,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:06:41,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:06:41,212 INFO L87 Difference]: Start difference. First operand 445 states and 598 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:41,321 INFO L93 Difference]: Finished difference Result 464 states and 619 transitions. [2024-11-08 17:06:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:06:41,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-08 17:06:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:41,325 INFO L225 Difference]: With dead ends: 464 [2024-11-08 17:06:41,325 INFO L226 Difference]: Without dead ends: 420 [2024-11-08 17:06:41,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:06:41,327 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:41,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:06:41,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2024-11-08 17:06:41,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2024-11-08 17:06:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 370 states have (on average 1.2864864864864864) internal successors, (476), 371 states have internal predecessors, (476), 40 states have call successors, (40), 6 states have call predecessors, (40), 9 states have return successors, (49), 46 states have call predecessors, (49), 39 states have call successors, (49) [2024-11-08 17:06:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 565 transitions. [2024-11-08 17:06:41,363 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 565 transitions. Word has length 49 [2024-11-08 17:06:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:41,364 INFO L471 AbstractCegarLoop]: Abstraction has 420 states and 565 transitions. [2024-11-08 17:06:41,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 565 transitions. [2024-11-08 17:06:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 17:06:41,366 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:41,366 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:41,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-08 17:06:41,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:41,567 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:41,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:41,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2134474190, now seen corresponding path program 1 times [2024-11-08 17:06:41,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:41,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876337834] [2024-11-08 17:06:41,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:41,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:41,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:41,569 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:41,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-08 17:06:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:41,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 17:06:41,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 17:06:41,803 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:06:41,803 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:41,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876337834] [2024-11-08 17:06:41,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876337834] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:06:41,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:06:41,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:06:41,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026828572] [2024-11-08 17:06:41,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:41,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:06:41,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:41,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:06:41,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:06:41,805 INFO L87 Difference]: Start difference. First operand 420 states and 565 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:42,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:42,349 INFO L93 Difference]: Finished difference Result 545 states and 727 transitions. [2024-11-08 17:06:42,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:06:42,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-08 17:06:42,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:42,354 INFO L225 Difference]: With dead ends: 545 [2024-11-08 17:06:42,354 INFO L226 Difference]: Without dead ends: 514 [2024-11-08 17:06:42,355 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:06:42,355 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 41 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:42,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 253 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 17:06:42,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2024-11-08 17:06:42,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 424. [2024-11-08 17:06:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 374 states have (on average 1.2807486631016043) internal successors, (479), 375 states have internal predecessors, (479), 40 states have call successors, (40), 6 states have call predecessors, (40), 9 states have return successors, (49), 46 states have call predecessors, (49), 39 states have call successors, (49) [2024-11-08 17:06:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 568 transitions. [2024-11-08 17:06:42,393 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 568 transitions. Word has length 50 [2024-11-08 17:06:42,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:42,394 INFO L471 AbstractCegarLoop]: Abstraction has 424 states and 568 transitions. [2024-11-08 17:06:42,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:42,394 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 568 transitions. [2024-11-08 17:06:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 17:06:42,396 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:42,396 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:42,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-08 17:06:42,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:42,600 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:42,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:42,601 INFO L85 PathProgramCache]: Analyzing trace with hash -566198360, now seen corresponding path program 1 times [2024-11-08 17:06:42,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:42,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555435183] [2024-11-08 17:06:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:42,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:42,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:42,606 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:42,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-08 17:06:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:42,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 17:06:42,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 17:06:44,354 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:06:44,354 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:44,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555435183] [2024-11-08 17:06:44,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555435183] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:06:44,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:06:44,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-08 17:06:44,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541243089] [2024-11-08 17:06:44,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:44,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 17:06:44,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:44,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 17:06:44,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-08 17:06:44,357 INFO L87 Difference]: Start difference. First operand 424 states and 568 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:48,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:48,017 INFO L93 Difference]: Finished difference Result 475 states and 636 transitions. [2024-11-08 17:06:48,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 17:06:48,018 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-08 17:06:48,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:48,020 INFO L225 Difference]: With dead ends: 475 [2024-11-08 17:06:48,020 INFO L226 Difference]: Without dead ends: 448 [2024-11-08 17:06:48,026 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-08 17:06:48,026 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 72 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:48,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 823 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-08 17:06:48,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2024-11-08 17:06:48,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 442. [2024-11-08 17:06:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 390 states have (on average 1.2794871794871794) internal successors, (499), 392 states have internal predecessors, (499), 42 states have call successors, (42), 6 states have call predecessors, (42), 9 states have return successors, (51), 48 states have call predecessors, (51), 41 states have call successors, (51) [2024-11-08 17:06:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 592 transitions. [2024-11-08 17:06:48,061 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 592 transitions. Word has length 50 [2024-11-08 17:06:48,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:48,061 INFO L471 AbstractCegarLoop]: Abstraction has 442 states and 592 transitions. [2024-11-08 17:06:48,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:48,062 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 592 transitions. [2024-11-08 17:06:48,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 17:06:48,063 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:48,064 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:48,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-08 17:06:48,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:48,269 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:48,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1821559572, now seen corresponding path program 1 times [2024-11-08 17:06:48,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:48,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141024938] [2024-11-08 17:06:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:48,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:48,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:48,272 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:48,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-08 17:06:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:48,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 17:06:48,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-08 17:06:48,644 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:06:48,645 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:48,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141024938] [2024-11-08 17:06:48,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141024938] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:06:48,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:06:48,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 17:06:48,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56637100] [2024-11-08 17:06:48,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:48,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:06:48,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:48,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:06:48,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:06:48,648 INFO L87 Difference]: Start difference. First operand 442 states and 592 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:49,411 INFO L93 Difference]: Finished difference Result 525 states and 701 transitions. [2024-11-08 17:06:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:06:49,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-08 17:06:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:49,414 INFO L225 Difference]: With dead ends: 525 [2024-11-08 17:06:49,415 INFO L226 Difference]: Without dead ends: 459 [2024-11-08 17:06:49,415 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:06:49,416 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 61 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:49,417 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 366 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 17:06:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2024-11-08 17:06:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 424. [2024-11-08 17:06:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 374 states have (on average 1.2700534759358288) internal successors, (475), 375 states have internal predecessors, (475), 40 states have call successors, (40), 6 states have call predecessors, (40), 9 states have return successors, (49), 46 states have call predecessors, (49), 39 states have call successors, (49) [2024-11-08 17:06:49,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 564 transitions. [2024-11-08 17:06:49,450 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 564 transitions. Word has length 50 [2024-11-08 17:06:49,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:49,450 INFO L471 AbstractCegarLoop]: Abstraction has 424 states and 564 transitions. [2024-11-08 17:06:49,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 564 transitions. [2024-11-08 17:06:49,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-08 17:06:49,452 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:49,452 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:49,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-08 17:06:49,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:49,656 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:49,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:49,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1251141765, now seen corresponding path program 1 times [2024-11-08 17:06:49,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:49,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292431501] [2024-11-08 17:06:49,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:49,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:49,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:49,658 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:49,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-08 17:06:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:49,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 17:06:49,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 17:06:51,401 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:06:51,401 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:51,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292431501] [2024-11-08 17:06:51,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292431501] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:06:51,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:06:51,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-08 17:06:51,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684783797] [2024-11-08 17:06:51,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:51,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 17:06:51,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:51,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 17:06:51,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-08 17:06:51,404 INFO L87 Difference]: Start difference. First operand 424 states and 564 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:54,824 INFO L93 Difference]: Finished difference Result 502 states and 668 transitions. [2024-11-08 17:06:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 17:06:54,825 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2024-11-08 17:06:54,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:54,827 INFO L225 Difference]: With dead ends: 502 [2024-11-08 17:06:54,828 INFO L226 Difference]: Without dead ends: 463 [2024-11-08 17:06:54,829 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:06:54,829 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 48 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:54,830 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 786 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-08 17:06:54,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2024-11-08 17:06:54,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 450. [2024-11-08 17:06:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 396 states have (on average 1.2575757575757576) internal successors, (498), 399 states have internal predecessors, (498), 44 states have call successors, (44), 6 states have call predecessors, (44), 9 states have return successors, (52), 49 states have call predecessors, (52), 42 states have call successors, (52) [2024-11-08 17:06:54,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 594 transitions. [2024-11-08 17:06:54,878 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 594 transitions. Word has length 51 [2024-11-08 17:06:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:54,878 INFO L471 AbstractCegarLoop]: Abstraction has 450 states and 594 transitions. [2024-11-08 17:06:54,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:54,879 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 594 transitions. [2024-11-08 17:06:54,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-08 17:06:54,882 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:54,882 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:54,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-08 17:06:55,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:55,083 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:55,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:55,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1393357641, now seen corresponding path program 1 times [2024-11-08 17:06:55,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:55,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716699798] [2024-11-08 17:06:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:55,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:55,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:55,085 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:55,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-08 17:06:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:55,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 17:06:55,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 17:06:55,803 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:06:55,803 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:55,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716699798] [2024-11-08 17:06:55,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716699798] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:06:55,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:06:55,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-08 17:06:55,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166773066] [2024-11-08 17:06:55,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:55,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 17:06:55,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:55,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 17:06:55,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:06:55,805 INFO L87 Difference]: Start difference. First operand 450 states and 594 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:57,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:57,759 INFO L93 Difference]: Finished difference Result 587 states and 781 transitions. [2024-11-08 17:06:57,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:06:57,760 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2024-11-08 17:06:57,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:57,762 INFO L225 Difference]: With dead ends: 587 [2024-11-08 17:06:57,762 INFO L226 Difference]: Without dead ends: 563 [2024-11-08 17:06:57,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:06:57,763 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 27 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:57,763 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 531 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-08 17:06:57,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2024-11-08 17:06:57,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 467. [2024-11-08 17:06:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 409 states have (on average 1.2665036674816625) internal successors, (518), 414 states have internal predecessors, (518), 48 states have call successors, (48), 6 states have call predecessors, (48), 9 states have return successors, (56), 52 states have call predecessors, (56), 46 states have call successors, (56) [2024-11-08 17:06:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 622 transitions. [2024-11-08 17:06:57,800 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 622 transitions. Word has length 51 [2024-11-08 17:06:57,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:57,801 INFO L471 AbstractCegarLoop]: Abstraction has 467 states and 622 transitions. [2024-11-08 17:06:57,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 622 transitions. [2024-11-08 17:06:57,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-08 17:06:57,803 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:57,803 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:57,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-08 17:06:58,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:58,004 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:58,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:58,004 INFO L85 PathProgramCache]: Analyzing trace with hash -609523299, now seen corresponding path program 1 times [2024-11-08 17:06:58,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:58,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331963344] [2024-11-08 17:06:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:58,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:58,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:58,008 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:58,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-08 17:06:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:58,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 17:06:58,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 17:06:58,382 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:06:58,382 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:06:58,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331963344] [2024-11-08 17:06:58,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331963344] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:06:58,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:06:58,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:06:58,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534717314] [2024-11-08 17:06:58,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:06:58,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:06:58,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:06:58,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:06:58,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:06:58,384 INFO L87 Difference]: Start difference. First operand 467 states and 622 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:58,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:06:58,549 INFO L93 Difference]: Finished difference Result 514 states and 681 transitions. [2024-11-08 17:06:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:06:58,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2024-11-08 17:06:58,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:06:58,552 INFO L225 Difference]: With dead ends: 514 [2024-11-08 17:06:58,552 INFO L226 Difference]: Without dead ends: 467 [2024-11-08 17:06:58,552 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:06:58,553 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 26 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:06:58,553 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 281 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:06:58,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2024-11-08 17:06:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2024-11-08 17:06:58,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 409 states have (on average 1.215158924205379) internal successors, (497), 414 states have internal predecessors, (497), 48 states have call successors, (48), 6 states have call predecessors, (48), 9 states have return successors, (56), 52 states have call predecessors, (56), 46 states have call successors, (56) [2024-11-08 17:06:58,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 601 transitions. [2024-11-08 17:06:58,583 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 601 transitions. Word has length 51 [2024-11-08 17:06:58,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:06:58,584 INFO L471 AbstractCegarLoop]: Abstraction has 467 states and 601 transitions. [2024-11-08 17:06:58,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:06:58,584 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 601 transitions. [2024-11-08 17:06:58,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-08 17:06:58,585 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:06:58,586 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:06:58,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-08 17:06:58,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:58,787 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:06:58,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:06:58,787 INFO L85 PathProgramCache]: Analyzing trace with hash 977915423, now seen corresponding path program 1 times [2024-11-08 17:06:58,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:06:58,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542055896] [2024-11-08 17:06:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:06:58,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:06:58,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:06:58,790 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:06:58,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-08 17:06:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:06:58,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 17:06:58,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:06:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 17:06:59,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:07:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 17:07:00,411 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:07:00,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542055896] [2024-11-08 17:07:00,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542055896] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:07:00,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:07:00,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2024-11-08 17:07:00,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422981261] [2024-11-08 17:07:00,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:07:00,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 17:07:00,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:07:00,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 17:07:00,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:07:00,413 INFO L87 Difference]: Start difference. First operand 467 states and 601 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 17:07:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:07:01,223 INFO L93 Difference]: Finished difference Result 495 states and 634 transitions. [2024-11-08 17:07:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:07:01,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-11-08 17:07:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:07:01,226 INFO L225 Difference]: With dead ends: 495 [2024-11-08 17:07:01,226 INFO L226 Difference]: Without dead ends: 459 [2024-11-08 17:07:01,226 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-08 17:07:01,227 INFO L432 NwaCegarLoop]: 101 mSDtfsCounter, 20 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 17:07:01,227 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 571 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 17:07:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2024-11-08 17:07:01,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 443. [2024-11-08 17:07:01,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 385 states have (on average 1.2181818181818183) internal successors, (469), 391 states have internal predecessors, (469), 48 states have call successors, (48), 6 states have call predecessors, (48), 9 states have return successors, (56), 51 states have call predecessors, (56), 46 states have call successors, (56) [2024-11-08 17:07:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 573 transitions. [2024-11-08 17:07:01,278 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 573 transitions. Word has length 51 [2024-11-08 17:07:01,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:07:01,279 INFO L471 AbstractCegarLoop]: Abstraction has 443 states and 573 transitions. [2024-11-08 17:07:01,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 17:07:01,279 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 573 transitions. [2024-11-08 17:07:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-08 17:07:01,281 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:07:01,281 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:07:01,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-08 17:07:01,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:01,481 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:07:01,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:07:01,482 INFO L85 PathProgramCache]: Analyzing trace with hash -317311561, now seen corresponding path program 1 times [2024-11-08 17:07:01,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:07:01,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576808207] [2024-11-08 17:07:01,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:07:01,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:01,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:07:01,484 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:07:01,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-08 17:07:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:07:01,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 17:07:01,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:07:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 17:07:01,686 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:07:01,686 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:07:01,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576808207] [2024-11-08 17:07:01,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576808207] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:07:01,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:07:01,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:07:01,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187530193] [2024-11-08 17:07:01,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:07:01,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:07:01,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:07:01,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:07:01,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:07:01,689 INFO L87 Difference]: Start difference. First operand 443 states and 573 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:07:01,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:07:01,834 INFO L93 Difference]: Finished difference Result 452 states and 581 transitions. [2024-11-08 17:07:01,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:07:01,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2024-11-08 17:07:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:07:01,837 INFO L225 Difference]: With dead ends: 452 [2024-11-08 17:07:01,838 INFO L226 Difference]: Without dead ends: 405 [2024-11-08 17:07:01,839 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:07:01,839 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 0 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:07:01,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 282 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:07:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-11-08 17:07:01,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 368. [2024-11-08 17:07:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 320 states have (on average 1.215625) internal successors, (389), 325 states have internal predecessors, (389), 38 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (43), 40 states have call predecessors, (43), 36 states have call successors, (43) [2024-11-08 17:07:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 470 transitions. [2024-11-08 17:07:01,898 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 470 transitions. Word has length 53 [2024-11-08 17:07:01,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:07:01,898 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 470 transitions. [2024-11-08 17:07:01,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:07:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 470 transitions. [2024-11-08 17:07:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-08 17:07:01,900 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:07:01,900 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:07:01,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-08 17:07:02,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:02,101 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:07:02,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:07:02,101 INFO L85 PathProgramCache]: Analyzing trace with hash 685169853, now seen corresponding path program 1 times [2024-11-08 17:07:02,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:07:02,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583876493] [2024-11-08 17:07:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:07:02,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:02,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:07:02,104 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:07:02,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-08 17:07:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:07:02,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:07:02,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:07:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 17:07:03,779 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:07:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 17:07:04,779 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:07:04,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583876493] [2024-11-08 17:07:04,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583876493] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 17:07:04,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:07:04,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-08 17:07:04,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234899709] [2024-11-08 17:07:04,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:07:04,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:07:04,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:07:04,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:07:04,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:07:04,781 INFO L87 Difference]: Start difference. First operand 368 states and 470 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:07:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:07:06,353 INFO L93 Difference]: Finished difference Result 449 states and 569 transitions. [2024-11-08 17:07:06,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:07:06,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2024-11-08 17:07:06,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:07:06,355 INFO L225 Difference]: With dead ends: 449 [2024-11-08 17:07:06,355 INFO L226 Difference]: Without dead ends: 388 [2024-11-08 17:07:06,356 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-08 17:07:06,357 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 24 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-08 17:07:06,357 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 373 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-08 17:07:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2024-11-08 17:07:06,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 358. [2024-11-08 17:07:06,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 310 states have (on average 1.2129032258064516) internal successors, (376), 314 states have internal predecessors, (376), 39 states have call successors, (39), 6 states have call predecessors, (39), 8 states have return successors, (40), 40 states have call predecessors, (40), 37 states have call successors, (40) [2024-11-08 17:07:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 455 transitions. [2024-11-08 17:07:06,389 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 455 transitions. Word has length 53 [2024-11-08 17:07:06,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:07:06,389 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 455 transitions. [2024-11-08 17:07:06,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:07:06,390 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 455 transitions. [2024-11-08 17:07:06,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-08 17:07:06,391 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:07:06,391 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:07:06,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-08 17:07:06,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:06,592 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:07:06,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:07:06,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1804015042, now seen corresponding path program 1 times [2024-11-08 17:07:06,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:07:06,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831894285] [2024-11-08 17:07:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:07:06,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:06,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:07:06,595 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:07:06,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-08 17:07:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:07:06,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-08 17:07:06,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:07:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 17:07:09,033 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:07:09,033 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:07:09,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831894285] [2024-11-08 17:07:09,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831894285] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:07:09,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:07:09,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-08 17:07:09,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107539468] [2024-11-08 17:07:09,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:07:09,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 17:07:09,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:07:09,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 17:07:09,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-08 17:07:09,035 INFO L87 Difference]: Start difference. First operand 358 states and 455 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-08 17:07:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:07:13,698 INFO L93 Difference]: Finished difference Result 444 states and 563 transitions. [2024-11-08 17:07:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 17:07:13,699 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 55 [2024-11-08 17:07:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:07:13,701 INFO L225 Difference]: With dead ends: 444 [2024-11-08 17:07:13,701 INFO L226 Difference]: Without dead ends: 399 [2024-11-08 17:07:13,702 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-08 17:07:13,703 INFO L432 NwaCegarLoop]: 126 mSDtfsCounter, 91 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-08 17:07:13,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1273 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-08 17:07:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-11-08 17:07:13,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 358. [2024-11-08 17:07:13,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 310 states have (on average 1.2032258064516128) internal successors, (373), 314 states have internal predecessors, (373), 39 states have call successors, (39), 6 states have call predecessors, (39), 8 states have return successors, (40), 40 states have call predecessors, (40), 37 states have call successors, (40) [2024-11-08 17:07:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 452 transitions. [2024-11-08 17:07:13,752 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 452 transitions. Word has length 55 [2024-11-08 17:07:13,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:07:13,753 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 452 transitions. [2024-11-08 17:07:13,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-08 17:07:13,753 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 452 transitions. [2024-11-08 17:07:13,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-08 17:07:13,754 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:07:13,754 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:07:13,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-08 17:07:13,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:13,955 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:07:13,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:07:13,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1661799166, now seen corresponding path program 1 times [2024-11-08 17:07:13,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:07:13,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711032710] [2024-11-08 17:07:13,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:07:13,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:13,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:07:13,957 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:07:13,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-08 17:07:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:07:14,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 17:07:14,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:07:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 17:07:15,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:07:16,802 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:07:16,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711032710] [2024-11-08 17:07:16,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711032710] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:07:16,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1988446534] [2024-11-08 17:07:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:07:16,802 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-08 17:07:16,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 [2024-11-08 17:07:16,804 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-08 17:07:16,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2024-11-08 17:07:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:07:16,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 17:07:16,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:07:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 17:07:17,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:07:18,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1988446534] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:07:18,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:07:18,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-08 17:07:18,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038733423] [2024-11-08 17:07:18,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:07:18,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 17:07:18,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:07:18,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 17:07:18,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-08 17:07:18,081 INFO L87 Difference]: Start difference. First operand 358 states and 452 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-08 17:07:20,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:07:20,392 INFO L93 Difference]: Finished difference Result 439 states and 557 transitions. [2024-11-08 17:07:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 17:07:20,393 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 55 [2024-11-08 17:07:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:07:20,395 INFO L225 Difference]: With dead ends: 439 [2024-11-08 17:07:20,395 INFO L226 Difference]: Without dead ends: 399 [2024-11-08 17:07:20,395 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-11-08 17:07:20,396 INFO L432 NwaCegarLoop]: 126 mSDtfsCounter, 45 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-08 17:07:20,396 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 921 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-08 17:07:20,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-11-08 17:07:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 358. [2024-11-08 17:07:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 310 states have (on average 1.196774193548387) internal successors, (371), 314 states have internal predecessors, (371), 39 states have call successors, (39), 6 states have call predecessors, (39), 8 states have return successors, (40), 40 states have call predecessors, (40), 37 states have call successors, (40) [2024-11-08 17:07:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 450 transitions. [2024-11-08 17:07:20,432 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 450 transitions. Word has length 55 [2024-11-08 17:07:20,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:07:20,433 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 450 transitions. [2024-11-08 17:07:20,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-08 17:07:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 450 transitions. [2024-11-08 17:07:20,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-08 17:07:20,434 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:07:20,435 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:07:20,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2024-11-08 17:07:20,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-08 17:07:20,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:20,836 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:07:20,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:07:20,836 INFO L85 PathProgramCache]: Analyzing trace with hash 212141896, now seen corresponding path program 1 times [2024-11-08 17:07:20,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:07:20,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936486155] [2024-11-08 17:07:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:07:20,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:20,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:07:20,839 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:07:20,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-08 17:07:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:07:20,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 17:07:20,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:07:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 17:07:22,597 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:07:22,597 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:07:22,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936486155] [2024-11-08 17:07:22,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936486155] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:07:22,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:07:22,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-08 17:07:22,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295231620] [2024-11-08 17:07:22,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:07:22,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 17:07:22,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:07:22,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 17:07:22,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-11-08 17:07:22,600 INFO L87 Difference]: Start difference. First operand 358 states and 450 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 17:07:25,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:07:25,629 INFO L93 Difference]: Finished difference Result 430 states and 538 transitions. [2024-11-08 17:07:25,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 17:07:25,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2024-11-08 17:07:25,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:07:25,632 INFO L225 Difference]: With dead ends: 430 [2024-11-08 17:07:25,632 INFO L226 Difference]: Without dead ends: 376 [2024-11-08 17:07:25,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-08 17:07:25,634 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 55 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:07:25,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 844 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-08 17:07:25,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2024-11-08 17:07:25,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 358. [2024-11-08 17:07:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 310 states have (on average 1.1870967741935483) internal successors, (368), 314 states have internal predecessors, (368), 39 states have call successors, (39), 6 states have call predecessors, (39), 8 states have return successors, (40), 40 states have call predecessors, (40), 37 states have call successors, (40) [2024-11-08 17:07:25,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 447 transitions. [2024-11-08 17:07:25,672 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 447 transitions. Word has length 55 [2024-11-08 17:07:25,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:07:25,673 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 447 transitions. [2024-11-08 17:07:25,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 17:07:25,673 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 447 transitions. [2024-11-08 17:07:25,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-08 17:07:25,675 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:07:25,675 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:07:25,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-08 17:07:25,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:25,882 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:07:25,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:07:25,882 INFO L85 PathProgramCache]: Analyzing trace with hash 69926020, now seen corresponding path program 1 times [2024-11-08 17:07:25,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:07:25,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518417472] [2024-11-08 17:07:25,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:07:25,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:25,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:07:25,885 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:07:25,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-08 17:07:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:07:25,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 17:07:25,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:07:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-08 17:07:35,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:07:37,197 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:07:37,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518417472] [2024-11-08 17:07:37,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518417472] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:07:37,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1706914642] [2024-11-08 17:07:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:07:37,198 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-08 17:07:37,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 [2024-11-08 17:07:37,199 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-08 17:07:37,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2024-11-08 17:07:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:07:37,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 17:07:37,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:07:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-08 17:07:37,826 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:07:37,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1706914642] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:07:37,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:07:37,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2024-11-08 17:07:37,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24533408] [2024-11-08 17:07:37,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:07:37,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 17:07:37,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:07:37,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 17:07:37,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=159, Unknown=2, NotChecked=0, Total=210 [2024-11-08 17:07:37,828 INFO L87 Difference]: Start difference. First operand 358 states and 447 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 17:07:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:07:39,279 INFO L93 Difference]: Finished difference Result 378 states and 469 transitions. [2024-11-08 17:07:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:07:39,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2024-11-08 17:07:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:07:39,281 INFO L225 Difference]: With dead ends: 378 [2024-11-08 17:07:39,281 INFO L226 Difference]: Without dead ends: 376 [2024-11-08 17:07:39,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=56, Invalid=182, Unknown=2, NotChecked=0, Total=240 [2024-11-08 17:07:39,282 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 10 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-08 17:07:39,282 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 507 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-08 17:07:39,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2024-11-08 17:07:39,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 365. [2024-11-08 17:07:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 313 states have (on average 1.1853035143769968) internal successors, (371), 320 states have internal predecessors, (371), 42 states have call successors, (42), 7 states have call predecessors, (42), 9 states have return successors, (43), 40 states have call predecessors, (43), 40 states have call successors, (43) [2024-11-08 17:07:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 456 transitions. [2024-11-08 17:07:39,317 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 456 transitions. Word has length 55 [2024-11-08 17:07:39,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:07:39,318 INFO L471 AbstractCegarLoop]: Abstraction has 365 states and 456 transitions. [2024-11-08 17:07:39,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 17:07:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 456 transitions. [2024-11-08 17:07:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-08 17:07:39,319 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:07:39,319 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:07:39,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2024-11-08 17:07:39,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-08 17:07:39,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:39,724 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:07:39,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:07:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash -225389381, now seen corresponding path program 1 times [2024-11-08 17:07:39,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:07:39,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205148626] [2024-11-08 17:07:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:07:39,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:39,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:07:39,726 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:07:39,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-08 17:07:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:07:39,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 17:07:39,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:07:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 17:07:42,036 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:07:42,036 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:07:42,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205148626] [2024-11-08 17:07:42,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205148626] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:07:42,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:07:42,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-08 17:07:42,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330323879] [2024-11-08 17:07:42,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:07:42,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 17:07:42,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:07:42,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 17:07:42,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-08 17:07:42,038 INFO L87 Difference]: Start difference. First operand 365 states and 456 transitions. Second operand has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-08 17:07:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:07:46,141 INFO L93 Difference]: Finished difference Result 419 states and 522 transitions. [2024-11-08 17:07:46,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 17:07:46,142 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2024-11-08 17:07:46,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:07:46,143 INFO L225 Difference]: With dead ends: 419 [2024-11-08 17:07:46,143 INFO L226 Difference]: Without dead ends: 372 [2024-11-08 17:07:46,144 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-08 17:07:46,145 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 77 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-08 17:07:46,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 990 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-08 17:07:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2024-11-08 17:07:46,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 340. [2024-11-08 17:07:46,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 291 states have (on average 1.1855670103092784) internal successors, (345), 297 states have internal predecessors, (345), 39 states have call successors, (39), 7 states have call predecessors, (39), 9 states have return successors, (40), 37 states have call predecessors, (40), 37 states have call successors, (40) [2024-11-08 17:07:46,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 424 transitions. [2024-11-08 17:07:46,177 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 424 transitions. Word has length 56 [2024-11-08 17:07:46,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:07:46,178 INFO L471 AbstractCegarLoop]: Abstraction has 340 states and 424 transitions. [2024-11-08 17:07:46,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-08 17:07:46,178 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 424 transitions. [2024-11-08 17:07:46,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-08 17:07:46,179 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:07:46,179 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:07:46,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-08 17:07:46,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:46,380 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:07:46,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:07:46,380 INFO L85 PathProgramCache]: Analyzing trace with hash -339114241, now seen corresponding path program 1 times [2024-11-08 17:07:46,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:07:46,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814858936] [2024-11-08 17:07:46,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:07:46,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:46,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:07:46,381 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:07:46,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-08 17:07:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:07:46,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 17:07:46,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:07:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 17:07:47,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:07:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 17:07:48,740 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:07:48,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814858936] [2024-11-08 17:07:48,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814858936] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:07:48,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:07:48,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-08 17:07:48,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287448097] [2024-11-08 17:07:48,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:07:48,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 17:07:48,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:07:48,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 17:07:48,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-08 17:07:48,742 INFO L87 Difference]: Start difference. First operand 340 states and 424 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 11 states have internal predecessors, (54), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-08 17:07:50,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:07:50,390 INFO L93 Difference]: Finished difference Result 391 states and 486 transitions. [2024-11-08 17:07:50,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 17:07:50,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 11 states have internal predecessors, (54), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 56 [2024-11-08 17:07:50,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:07:50,393 INFO L225 Difference]: With dead ends: 391 [2024-11-08 17:07:50,393 INFO L226 Difference]: Without dead ends: 340 [2024-11-08 17:07:50,394 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-08 17:07:50,395 INFO L432 NwaCegarLoop]: 122 mSDtfsCounter, 60 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-08 17:07:50,395 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1005 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-08 17:07:50,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2024-11-08 17:07:50,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 316. [2024-11-08 17:07:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 270 states have (on average 1.1851851851851851) internal successors, (320), 275 states have internal predecessors, (320), 36 states have call successors, (36), 7 states have call predecessors, (36), 9 states have return successors, (37), 34 states have call predecessors, (37), 34 states have call successors, (37) [2024-11-08 17:07:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 393 transitions. [2024-11-08 17:07:50,432 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 393 transitions. Word has length 56 [2024-11-08 17:07:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:07:50,432 INFO L471 AbstractCegarLoop]: Abstraction has 316 states and 393 transitions. [2024-11-08 17:07:50,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 11 states have internal predecessors, (54), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-08 17:07:50,433 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 393 transitions. [2024-11-08 17:07:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-08 17:07:50,434 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:07:50,434 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:07:50,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-08 17:07:50,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:50,635 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:07:50,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:07:50,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1966150645, now seen corresponding path program 1 times [2024-11-08 17:07:50,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:07:50,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114982833] [2024-11-08 17:07:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:07:50,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:50,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:07:50,637 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:07:50,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-08 17:07:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:07:50,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 17:07:50,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:07:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 17:07:51,713 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:07:51,713 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:07:51,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114982833] [2024-11-08 17:07:51,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114982833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:07:51,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:07:51,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-08 17:07:51,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770878028] [2024-11-08 17:07:51,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:07:51,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 17:07:51,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:07:51,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 17:07:51,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-08 17:07:51,715 INFO L87 Difference]: Start difference. First operand 316 states and 393 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 17:07:53,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:07:53,532 INFO L93 Difference]: Finished difference Result 345 states and 423 transitions. [2024-11-08 17:07:53,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 17:07:53,533 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-11-08 17:07:53,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:07:53,535 INFO L225 Difference]: With dead ends: 345 [2024-11-08 17:07:53,535 INFO L226 Difference]: Without dead ends: 264 [2024-11-08 17:07:53,535 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:07:53,536 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 37 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-08 17:07:53,536 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 655 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-08 17:07:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-08 17:07:53,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 248. [2024-11-08 17:07:53,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 212 states have (on average 1.1745283018867925) internal successors, (249), 217 states have internal predecessors, (249), 26 states have call successors, (26), 7 states have call predecessors, (26), 9 states have return successors, (27), 24 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-08 17:07:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 302 transitions. [2024-11-08 17:07:53,559 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 302 transitions. Word has length 56 [2024-11-08 17:07:53,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:07:53,560 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 302 transitions. [2024-11-08 17:07:53,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 17:07:53,560 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 302 transitions. [2024-11-08 17:07:53,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-08 17:07:53,561 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:07:53,561 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:07:53,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-08 17:07:53,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:53,762 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:07:53,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:07:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1852425785, now seen corresponding path program 1 times [2024-11-08 17:07:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:07:53,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25896951] [2024-11-08 17:07:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:07:53,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:07:53,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:07:53,764 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:07:53,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-08 17:07:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:07:53,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 17:07:53,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:08:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-08 17:08:11,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:08:17,423 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:08:17,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25896951] [2024-11-08 17:08:17,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25896951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:08:17,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1819176835] [2024-11-08 17:08:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:08:17,424 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-08 17:08:17,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 [2024-11-08 17:08:17,425 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-08 17:08:17,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2024-11-08 17:08:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:08:17,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 17:08:17,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:08:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-08 17:08:26,445 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:08:26,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1819176835] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:08:26,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:08:26,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 12 [2024-11-08 17:08:26,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311334416] [2024-11-08 17:08:26,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:08:26,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 17:08:26,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:08:26,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 17:08:26,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=235, Unknown=2, NotChecked=0, Total=306 [2024-11-08 17:08:26,447 INFO L87 Difference]: Start difference. First operand 248 states and 302 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 17:08:28,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-08 17:08:39,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-08 17:08:43,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-08 17:08:47,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-08 17:08:47,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:08:47,708 INFO L93 Difference]: Finished difference Result 265 states and 318 transitions. [2024-11-08 17:08:47,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 17:08:47,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-11-08 17:08:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:08:47,709 INFO L225 Difference]: With dead ends: 265 [2024-11-08 17:08:47,709 INFO L226 Difference]: Without dead ends: 263 [2024-11-08 17:08:47,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=76, Invalid=264, Unknown=2, NotChecked=0, Total=342 [2024-11-08 17:08:47,710 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 9 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:08:47,711 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 426 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 1 Unknown, 0 Unchecked, 12.0s Time] [2024-11-08 17:08:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-11-08 17:08:47,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 245. [2024-11-08 17:08:47,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 212 states have (on average 1.1745283018867925) internal successors, (249), 214 states have internal predecessors, (249), 23 states have call successors, (23), 7 states have call predecessors, (23), 9 states have return successors, (24), 24 states have call predecessors, (24), 21 states have call successors, (24) [2024-11-08 17:08:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 296 transitions. [2024-11-08 17:08:47,733 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 296 transitions. Word has length 56 [2024-11-08 17:08:47,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:08:47,734 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 296 transitions. [2024-11-08 17:08:47,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 17:08:47,738 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 296 transitions. [2024-11-08 17:08:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-08 17:08:47,739 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:08:47,739 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:08:47,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-08 17:08:47,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2024-11-08 17:08:48,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt [2024-11-08 17:08:48,140 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:08:48,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:08:48,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1667634451, now seen corresponding path program 1 times [2024-11-08 17:08:48,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:08:48,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958811705] [2024-11-08 17:08:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:08:48,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:08:48,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:08:48,142 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:08:48,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-08 17:08:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:08:48,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 17:08:48,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:08:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 17:08:48,588 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:08:48,588 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:08:48,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958811705] [2024-11-08 17:08:48,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958811705] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:08:48,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:08:48,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 17:08:48,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902602102] [2024-11-08 17:08:48,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:08:48,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:08:48,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:08:48,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:08:48,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:08:48,590 INFO L87 Difference]: Start difference. First operand 245 states and 296 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 17:08:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:08:48,956 INFO L93 Difference]: Finished difference Result 257 states and 308 transitions. [2024-11-08 17:08:48,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:08:48,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 61 [2024-11-08 17:08:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:08:48,958 INFO L225 Difference]: With dead ends: 257 [2024-11-08 17:08:48,958 INFO L226 Difference]: Without dead ends: 255 [2024-11-08 17:08:48,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:08:48,959 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 8 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 17:08:48,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 459 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 17:08:48,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-08 17:08:48,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 251. [2024-11-08 17:08:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 216 states have (on average 1.1712962962962963) internal successors, (253), 219 states have internal predecessors, (253), 24 states have call successors, (24), 8 states have call predecessors, (24), 10 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) [2024-11-08 17:08:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 302 transitions. [2024-11-08 17:08:48,992 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 302 transitions. Word has length 61 [2024-11-08 17:08:48,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:08:48,993 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 302 transitions. [2024-11-08 17:08:48,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 17:08:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 302 transitions. [2024-11-08 17:08:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-08 17:08:48,994 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:08:48,994 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:08:49,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-08 17:08:49,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:08:49,195 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:08:49,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:08:49,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1651005049, now seen corresponding path program 1 times [2024-11-08 17:08:49,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:08:49,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534377742] [2024-11-08 17:08:49,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:08:49,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:08:49,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:08:49,197 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:08:49,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-08 17:08:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:08:49,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 17:08:49,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:08:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 17:08:49,608 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:08:49,608 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:08:49,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534377742] [2024-11-08 17:08:49,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534377742] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:08:49,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:08:49,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 17:08:49,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114886938] [2024-11-08 17:08:49,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:08:49,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:08:49,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:08:49,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:08:49,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:08:49,610 INFO L87 Difference]: Start difference. First operand 251 states and 302 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 17:08:50,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:08:50,007 INFO L93 Difference]: Finished difference Result 272 states and 323 transitions. [2024-11-08 17:08:50,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:08:50,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 61 [2024-11-08 17:08:50,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:08:50,010 INFO L225 Difference]: With dead ends: 272 [2024-11-08 17:08:50,010 INFO L226 Difference]: Without dead ends: 270 [2024-11-08 17:08:50,010 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:08:50,010 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 19 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 17:08:50,011 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 534 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 17:08:50,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2024-11-08 17:08:50,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 255. [2024-11-08 17:08:50,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 219 states have (on average 1.1689497716894977) internal successors, (256), 222 states have internal predecessors, (256), 24 states have call successors, (24), 9 states have call predecessors, (24), 11 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) [2024-11-08 17:08:50,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 305 transitions. [2024-11-08 17:08:50,041 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 305 transitions. Word has length 61 [2024-11-08 17:08:50,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:08:50,042 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 305 transitions. [2024-11-08 17:08:50,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 17:08:50,042 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 305 transitions. [2024-11-08 17:08:50,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-08 17:08:50,043 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:08:50,043 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:08:50,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-08 17:08:50,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:08:50,244 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:08:50,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:08:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash 970484103, now seen corresponding path program 1 times [2024-11-08 17:08:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:08:50,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94052854] [2024-11-08 17:08:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:08:50,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:08:50,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:08:50,246 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:08:50,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-08 17:08:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:08:50,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 17:08:50,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:08:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-08 17:08:55,874 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:08:55,875 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:08:55,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94052854] [2024-11-08 17:08:55,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94052854] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:08:55,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:08:55,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2024-11-08 17:08:55,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965417366] [2024-11-08 17:08:55,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:08:55,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 17:08:55,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:08:55,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 17:08:55,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-11-08 17:08:55,877 INFO L87 Difference]: Start difference. First operand 255 states and 305 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 17:09:06,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:09:06,352 INFO L93 Difference]: Finished difference Result 368 states and 446 transitions. [2024-11-08 17:09:06,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 17:09:06,355 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2024-11-08 17:09:06,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:09:06,357 INFO L225 Difference]: With dead ends: 368 [2024-11-08 17:09:06,357 INFO L226 Difference]: Without dead ends: 338 [2024-11-08 17:09:06,357 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-08 17:09:06,358 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 29 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2024-11-08 17:09:06,358 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1120 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2024-11-08 17:09:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2024-11-08 17:09:06,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 273. [2024-11-08 17:09:06,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 234 states have (on average 1.170940170940171) internal successors, (274), 237 states have internal predecessors, (274), 27 states have call successors, (27), 9 states have call predecessors, (27), 11 states have return successors, (28), 27 states have call predecessors, (28), 25 states have call successors, (28) [2024-11-08 17:09:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 329 transitions. [2024-11-08 17:09:06,399 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 329 transitions. Word has length 66 [2024-11-08 17:09:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:09:06,399 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 329 transitions. [2024-11-08 17:09:06,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 17:09:06,400 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 329 transitions. [2024-11-08 17:09:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-08 17:09:06,401 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:09:06,401 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:06,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-08 17:09:06,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:06,602 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:09:06,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:06,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1401255159, now seen corresponding path program 1 times [2024-11-08 17:09:06,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:09:06,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808036312] [2024-11-08 17:09:06,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:06,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:06,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:09:06,606 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:09:06,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-08 17:09:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:06,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 17:09:06,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:09:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-08 17:09:11,677 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:09:11,677 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:09:11,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808036312] [2024-11-08 17:09:11,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808036312] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:09:11,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:09:11,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-08 17:09:11,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309276934] [2024-11-08 17:09:11,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:09:11,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 17:09:11,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:09:11,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 17:09:11,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-08 17:09:11,679 INFO L87 Difference]: Start difference. First operand 273 states and 329 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 17:09:18,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-08 17:09:22,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:09:22,599 INFO L93 Difference]: Finished difference Result 372 states and 453 transitions. [2024-11-08 17:09:22,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 17:09:22,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2024-11-08 17:09:22,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:09:22,603 INFO L225 Difference]: With dead ends: 372 [2024-11-08 17:09:22,603 INFO L226 Difference]: Without dead ends: 342 [2024-11-08 17:09:22,603 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-11-08 17:09:22,604 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 27 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2024-11-08 17:09:22,605 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 760 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 441 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2024-11-08 17:09:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-08 17:09:22,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 265. [2024-11-08 17:09:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 227 states have (on average 1.1674008810572687) internal successors, (265), 230 states have internal predecessors, (265), 26 states have call successors, (26), 9 states have call predecessors, (26), 11 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-08 17:09:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 318 transitions. [2024-11-08 17:09:22,632 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 318 transitions. Word has length 66 [2024-11-08 17:09:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:09:22,633 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 318 transitions. [2024-11-08 17:09:22,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 17:09:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 318 transitions. [2024-11-08 17:09:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-08 17:09:22,634 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:09:22,634 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:22,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-08 17:09:22,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:22,835 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:09:22,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:22,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1769850328, now seen corresponding path program 1 times [2024-11-08 17:09:22,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:09:22,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938379229] [2024-11-08 17:09:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:22,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:22,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:09:22,837 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:09:22,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-08 17:09:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:22,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:09:22,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:09:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 17:09:24,268 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:09:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 17:09:25,080 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:09:25,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938379229] [2024-11-08 17:09:25,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938379229] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:09:25,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:09:25,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-08 17:09:25,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110092132] [2024-11-08 17:09:25,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:09:25,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 17:09:25,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:09:25,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 17:09:25,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-08 17:09:25,082 INFO L87 Difference]: Start difference. First operand 265 states and 318 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-08 17:09:27,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:09:27,726 INFO L93 Difference]: Finished difference Result 343 states and 409 transitions. [2024-11-08 17:09:27,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 17:09:27,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 67 [2024-11-08 17:09:27,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:09:27,728 INFO L225 Difference]: With dead ends: 343 [2024-11-08 17:09:27,728 INFO L226 Difference]: Without dead ends: 324 [2024-11-08 17:09:27,729 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-08 17:09:27,729 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 46 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-08 17:09:27,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 789 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-08 17:09:27,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2024-11-08 17:09:27,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 296. [2024-11-08 17:09:27,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 255 states have (on average 1.1568627450980393) internal successors, (295), 259 states have internal predecessors, (295), 29 states have call successors, (29), 9 states have call predecessors, (29), 11 states have return successors, (30), 29 states have call predecessors, (30), 27 states have call successors, (30) [2024-11-08 17:09:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 354 transitions. [2024-11-08 17:09:27,758 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 354 transitions. Word has length 67 [2024-11-08 17:09:27,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:09:27,758 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 354 transitions. [2024-11-08 17:09:27,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-08 17:09:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 354 transitions. [2024-11-08 17:09:27,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-08 17:09:27,760 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:09:27,760 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:27,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-08 17:09:27,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:27,961 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:09:27,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:27,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2008290126, now seen corresponding path program 1 times [2024-11-08 17:09:27,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:09:27,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806119214] [2024-11-08 17:09:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:27,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:27,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:09:27,963 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:09:27,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-08 17:09:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:28,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 17:09:28,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:09:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-08 17:09:34,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:09:38,538 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:09:38,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806119214] [2024-11-08 17:09:38,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806119214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:09:38,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1571014282] [2024-11-08 17:09:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:38,539 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-08 17:09:38,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 [2024-11-08 17:09:38,541 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-08 17:09:38,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2024-11-08 17:09:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:38,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 17:09:38,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:09:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-08 17:09:47,249 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:09:47,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1571014282] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:09:47,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:09:47,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 18 [2024-11-08 17:09:47,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631696810] [2024-11-08 17:09:47,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:09:47,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 17:09:47,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:09:47,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 17:09:47,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2024-11-08 17:09:47,251 INFO L87 Difference]: Start difference. First operand 296 states and 354 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 17:09:54,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:09:54,940 INFO L93 Difference]: Finished difference Result 405 states and 491 transitions. [2024-11-08 17:09:54,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 17:09:54,941 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2024-11-08 17:09:54,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:09:54,943 INFO L225 Difference]: With dead ends: 405 [2024-11-08 17:09:54,943 INFO L226 Difference]: Without dead ends: 375 [2024-11-08 17:09:54,943 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2024-11-08 17:09:54,944 INFO L432 NwaCegarLoop]: 117 mSDtfsCounter, 30 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2024-11-08 17:09:54,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 903 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2024-11-08 17:09:54,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-08 17:09:54,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 306. [2024-11-08 17:09:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 264 states have (on average 1.1666666666666667) internal successors, (308), 268 states have internal predecessors, (308), 30 states have call successors, (30), 9 states have call predecessors, (30), 11 states have return successors, (31), 30 states have call predecessors, (31), 28 states have call successors, (31) [2024-11-08 17:09:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 369 transitions. [2024-11-08 17:09:54,983 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 369 transitions. Word has length 67 [2024-11-08 17:09:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:09:54,983 INFO L471 AbstractCegarLoop]: Abstraction has 306 states and 369 transitions. [2024-11-08 17:09:54,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 17:09:54,984 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 369 transitions. [2024-11-08 17:09:54,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-08 17:09:54,985 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:09:54,985 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:55,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-08 17:09:55,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2024-11-08 17:09:55,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt [2024-11-08 17:09:55,386 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:09:55,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:55,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1777204080, now seen corresponding path program 1 times [2024-11-08 17:09:55,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:09:55,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11537185] [2024-11-08 17:09:55,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:55,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:55,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:09:55,388 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:09:55,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-08 17:09:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:55,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 17:09:55,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:09:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-08 17:09:56,611 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:09:56,611 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:09:56,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11537185] [2024-11-08 17:09:56,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11537185] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:09:56,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:09:56,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-08 17:09:56,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466695592] [2024-11-08 17:09:56,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:09:56,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 17:09:56,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:09:56,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 17:09:56,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-08 17:09:56,613 INFO L87 Difference]: Start difference. First operand 306 states and 369 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 17:10:01,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:10:01,384 INFO L93 Difference]: Finished difference Result 378 states and 454 transitions. [2024-11-08 17:10:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 17:10:01,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2024-11-08 17:10:01,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:10:01,387 INFO L225 Difference]: With dead ends: 378 [2024-11-08 17:10:01,387 INFO L226 Difference]: Without dead ends: 348 [2024-11-08 17:10:01,387 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:10:01,388 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 29 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-08 17:10:01,388 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 638 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-08 17:10:01,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-11-08 17:10:01,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 271. [2024-11-08 17:10:01,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 234 states have (on average 1.1452991452991452) internal successors, (268), 238 states have internal predecessors, (268), 25 states have call successors, (25), 9 states have call predecessors, (25), 11 states have return successors, (26), 25 states have call predecessors, (26), 23 states have call successors, (26) [2024-11-08 17:10:01,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 319 transitions. [2024-11-08 17:10:01,419 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 319 transitions. Word has length 67 [2024-11-08 17:10:01,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:10:01,419 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 319 transitions. [2024-11-08 17:10:01,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 17:10:01,420 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 319 transitions. [2024-11-08 17:10:01,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-08 17:10:01,421 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:10:01,421 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:10:01,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-11-08 17:10:01,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:01,622 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:10:01,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:10:01,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1517399324, now seen corresponding path program 1 times [2024-11-08 17:10:01,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:10:01,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986621535] [2024-11-08 17:10:01,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:10:01,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:01,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:10:01,624 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:10:01,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-08 17:10:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:10:01,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-08 17:10:01,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:10:05,352 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-08 17:10:05,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:10:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-08 17:10:12,644 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:10:12,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986621535] [2024-11-08 17:10:12,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986621535] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:10:12,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:10:12,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-11-08 17:10:12,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129641764] [2024-11-08 17:10:12,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:10:12,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 17:10:12,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:10:12,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 17:10:12,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2024-11-08 17:10:12,647 INFO L87 Difference]: Start difference. First operand 271 states and 319 transitions. Second operand has 26 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-08 17:10:29,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:10:29,353 INFO L93 Difference]: Finished difference Result 376 states and 442 transitions. [2024-11-08 17:10:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-08 17:10:29,354 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 67 [2024-11-08 17:10:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:10:29,355 INFO L225 Difference]: With dead ends: 376 [2024-11-08 17:10:29,356 INFO L226 Difference]: Without dead ends: 356 [2024-11-08 17:10:29,357 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=287, Invalid=903, Unknown=0, NotChecked=0, Total=1190 [2024-11-08 17:10:29,357 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 131 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2024-11-08 17:10:29,358 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 805 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2024-11-08 17:10:29,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-11-08 17:10:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 270. [2024-11-08 17:10:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 233 states have (on average 1.1330472103004292) internal successors, (264), 237 states have internal predecessors, (264), 25 states have call successors, (25), 9 states have call predecessors, (25), 11 states have return successors, (26), 25 states have call predecessors, (26), 23 states have call successors, (26) [2024-11-08 17:10:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 315 transitions. [2024-11-08 17:10:29,401 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 315 transitions. Word has length 67 [2024-11-08 17:10:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:10:29,401 INFO L471 AbstractCegarLoop]: Abstraction has 270 states and 315 transitions. [2024-11-08 17:10:29,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-08 17:10:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 315 transitions. [2024-11-08 17:10:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-08 17:10:29,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:10:29,402 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:10:29,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-08 17:10:29,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:29,603 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:10:29,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:10:29,603 INFO L85 PathProgramCache]: Analyzing trace with hash -899188034, now seen corresponding path program 1 times [2024-11-08 17:10:29,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:10:29,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713653935] [2024-11-08 17:10:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:10:29,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:29,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:10:29,606 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:10:29,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-08 17:10:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:10:29,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 17:10:29,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:10:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-08 17:10:30,063 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:10:30,063 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:10:30,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713653935] [2024-11-08 17:10:30,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713653935] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:10:30,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:10:30,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 17:10:30,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324586979] [2024-11-08 17:10:30,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:10:30,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:10:30,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:10:30,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:10:30,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:10:30,065 INFO L87 Difference]: Start difference. First operand 270 states and 315 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-08 17:10:30,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:10:30,457 INFO L93 Difference]: Finished difference Result 291 states and 336 transitions. [2024-11-08 17:10:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:10:30,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2024-11-08 17:10:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:10:30,459 INFO L225 Difference]: With dead ends: 291 [2024-11-08 17:10:30,459 INFO L226 Difference]: Without dead ends: 277 [2024-11-08 17:10:30,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:10:30,460 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 13 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 17:10:30,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 496 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 17:10:30,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-11-08 17:10:30,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 235. [2024-11-08 17:10:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 200 states have (on average 1.14) internal successors, (228), 206 states have internal predecessors, (228), 23 states have call successors, (23), 9 states have call predecessors, (23), 11 states have return successors, (24), 21 states have call predecessors, (24), 21 states have call successors, (24) [2024-11-08 17:10:30,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 275 transitions. [2024-11-08 17:10:30,484 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 275 transitions. Word has length 69 [2024-11-08 17:10:30,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:10:30,484 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 275 transitions. [2024-11-08 17:10:30,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-08 17:10:30,484 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 275 transitions. [2024-11-08 17:10:30,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-08 17:10:30,485 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:10:30,485 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:10:30,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-11-08 17:10:30,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:30,686 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:10:30,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:10:30,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1496112838, now seen corresponding path program 1 times [2024-11-08 17:10:30,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:10:30,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823205638] [2024-11-08 17:10:30,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:10:30,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:30,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:10:30,688 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:10:30,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-08 17:10:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:10:30,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 17:10:30,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:10:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-08 17:10:31,091 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:10:31,091 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:10:31,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823205638] [2024-11-08 17:10:31,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823205638] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:10:31,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:10:31,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 17:10:31,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100739435] [2024-11-08 17:10:31,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:10:31,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:10:31,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:10:31,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:10:31,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:10:31,093 INFO L87 Difference]: Start difference. First operand 235 states and 275 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-08 17:10:31,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:10:31,477 INFO L93 Difference]: Finished difference Result 252 states and 291 transitions. [2024-11-08 17:10:31,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:10:31,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2024-11-08 17:10:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:10:31,479 INFO L225 Difference]: With dead ends: 252 [2024-11-08 17:10:31,479 INFO L226 Difference]: Without dead ends: 173 [2024-11-08 17:10:31,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:10:31,480 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 13 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 17:10:31,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 489 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 17:10:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-08 17:10:31,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 150. [2024-11-08 17:10:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 128 states have (on average 1.171875) internal successors, (150), 132 states have internal predecessors, (150), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-08 17:10:31,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 177 transitions. [2024-11-08 17:10:31,505 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 177 transitions. Word has length 69 [2024-11-08 17:10:31,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:10:31,506 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 177 transitions. [2024-11-08 17:10:31,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-08 17:10:31,506 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 177 transitions. [2024-11-08 17:10:31,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-08 17:10:31,507 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:10:31,507 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:10:31,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-08 17:10:31,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:31,708 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:10:31,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:10:31,708 INFO L85 PathProgramCache]: Analyzing trace with hash 91204395, now seen corresponding path program 1 times [2024-11-08 17:10:31,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:10:31,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050389960] [2024-11-08 17:10:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:10:31,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:31,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:10:31,711 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:10:31,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-08 17:10:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:10:31,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:10:31,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:10:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 17:10:32,846 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:10:33,632 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 17:10:33,632 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:10:33,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050389960] [2024-11-08 17:10:33,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050389960] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:10:33,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:10:33,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-11-08 17:10:33,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700422667] [2024-11-08 17:10:33,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:10:33,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 17:10:33,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:10:33,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 17:10:33,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-08 17:10:33,634 INFO L87 Difference]: Start difference. First operand 150 states and 177 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 17:10:35,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:10:35,130 INFO L93 Difference]: Finished difference Result 179 states and 204 transitions. [2024-11-08 17:10:35,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 17:10:35,130 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 68 [2024-11-08 17:10:35,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:10:35,131 INFO L225 Difference]: With dead ends: 179 [2024-11-08 17:10:35,131 INFO L226 Difference]: Without dead ends: 126 [2024-11-08 17:10:35,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-08 17:10:35,132 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 9 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:10:35,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 617 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 17:10:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-08 17:10:35,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-08 17:10:35,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 110 states have internal predecessors, (123), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-08 17:10:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2024-11-08 17:10:35,145 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 68 [2024-11-08 17:10:35,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:10:35,145 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2024-11-08 17:10:35,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 17:10:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2024-11-08 17:10:35,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-08 17:10:35,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:10:35,146 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:10:35,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-11-08 17:10:35,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:35,346 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:10:35,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:10:35,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1706797641, now seen corresponding path program 1 times [2024-11-08 17:10:35,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:10:35,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065242854] [2024-11-08 17:10:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:10:35,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:35,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:10:35,349 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:10:35,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-08 17:10:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:10:35,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 17:10:35,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:10:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-08 17:10:35,829 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:10:35,830 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:10:35,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065242854] [2024-11-08 17:10:35,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065242854] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:10:35,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:10:35,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:10:35,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923743584] [2024-11-08 17:10:35,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:10:35,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:10:35,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:10:35,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:10:35,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:10:35,832 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 17:10:35,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:10:35,944 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2024-11-08 17:10:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:10:35,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2024-11-08 17:10:35,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:10:35,945 INFO L225 Difference]: With dead ends: 154 [2024-11-08 17:10:35,945 INFO L226 Difference]: Without dead ends: 108 [2024-11-08 17:10:35,946 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:10:35,946 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 13 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:10:35,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 242 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:10:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-08 17:10:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2024-11-08 17:10:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 94 states have internal predecessors, (103), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 17:10:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2024-11-08 17:10:35,956 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 70 [2024-11-08 17:10:35,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:10:35,956 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2024-11-08 17:10:35,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 17:10:35,957 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2024-11-08 17:10:35,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-08 17:10:35,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:10:35,957 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:10:35,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-11-08 17:10:36,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:36,158 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:10:36,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:10:36,158 INFO L85 PathProgramCache]: Analyzing trace with hash -537185657, now seen corresponding path program 1 times [2024-11-08 17:10:36,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:10:36,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428108068] [2024-11-08 17:10:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:10:36,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:36,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:10:36,160 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:10:36,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-08 17:10:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:10:36,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:10:36,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:10:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 17:10:37,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:10:39,171 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:10:39,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428108068] [2024-11-08 17:10:39,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428108068] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:10:39,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1249042830] [2024-11-08 17:10:39,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:10:39,172 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-08 17:10:39,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 [2024-11-08 17:10:39,173 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-08 17:10:39,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2024-11-08 17:10:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:10:39,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 17:10:39,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:10:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-08 17:10:40,171 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:10:40,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1249042830] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:10:40,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:10:40,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2024-11-08 17:10:40,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39770822] [2024-11-08 17:10:40,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:10:40,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:10:40,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:10:40,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:10:40,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2024-11-08 17:10:40,173 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 17:10:40,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:10:40,908 INFO L93 Difference]: Finished difference Result 157 states and 172 transitions. [2024-11-08 17:10:40,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:10:40,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2024-11-08 17:10:40,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:10:40,910 INFO L225 Difference]: With dead ends: 157 [2024-11-08 17:10:40,910 INFO L226 Difference]: Without dead ends: 109 [2024-11-08 17:10:40,910 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2024-11-08 17:10:40,911 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 20 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 17:10:40,911 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 304 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 17:10:40,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-08 17:10:40,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2024-11-08 17:10:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 92 states have (on average 1.108695652173913) internal successors, (102), 94 states have internal predecessors, (102), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 17:10:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 120 transitions. [2024-11-08 17:10:40,923 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 120 transitions. Word has length 70 [2024-11-08 17:10:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:10:40,923 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 120 transitions. [2024-11-08 17:10:40,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 17:10:40,923 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 120 transitions. [2024-11-08 17:10:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-08 17:10:40,924 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:10:40,924 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:10:40,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2024-11-08 17:10:41,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-11-08 17:10:41,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:41,325 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:10:41,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:10:41,326 INFO L85 PathProgramCache]: Analyzing trace with hash 164414217, now seen corresponding path program 1 times [2024-11-08 17:10:41,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:10:41,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950121963] [2024-11-08 17:10:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:10:41,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:41,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:10:41,327 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:10:41,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-08 17:10:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:10:41,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 17:10:41,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:10:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 17:10:42,200 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:10:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 17:10:43,004 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:10:43,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950121963] [2024-11-08 17:10:43,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950121963] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:10:43,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:10:43,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-08 17:10:43,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452895768] [2024-11-08 17:10:43,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:10:43,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 17:10:43,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:10:43,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 17:10:43,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-08 17:10:43,007 INFO L87 Difference]: Start difference. First operand 108 states and 120 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 17:10:43,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:10:43,720 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2024-11-08 17:10:43,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:10:43,721 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 70 [2024-11-08 17:10:43,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:10:43,721 INFO L225 Difference]: With dead ends: 120 [2024-11-08 17:10:43,721 INFO L226 Difference]: Without dead ends: 69 [2024-11-08 17:10:43,722 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-08 17:10:43,722 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 17:10:43,722 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 406 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 17:10:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-08 17:10:43,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-08 17:10:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 57 states have internal predecessors, (62), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 17:10:43,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2024-11-08 17:10:43,731 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 70 [2024-11-08 17:10:43,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:10:43,731 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2024-11-08 17:10:43,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 17:10:43,732 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2024-11-08 17:10:43,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-08 17:10:43,732 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:10:43,733 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:10:43,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-08 17:10:43,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:43,933 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:10:43,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:10:43,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1862373464, now seen corresponding path program 1 times [2024-11-08 17:10:43,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:10:43,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216027277] [2024-11-08 17:10:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:10:43,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:43,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:10:43,935 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:10:43,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-08 17:10:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:10:44,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 17:10:44,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:10:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 17:10:48,729 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:10:53,107 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:10:53,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216027277] [2024-11-08 17:10:53,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216027277] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:10:53,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1848244157] [2024-11-08 17:10:53,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:10:53,108 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-08 17:10:53,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 [2024-11-08 17:10:53,112 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-08 17:10:53,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2024-11-08 17:10:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:10:53,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-08 17:10:53,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:10:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-08 17:10:58,595 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:10:58,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1848244157] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:10:58,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:10:58,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 14 [2024-11-08 17:10:58,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895549977] [2024-11-08 17:10:58,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:10:58,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:10:58,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:10:58,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:10:58,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-11-08 17:10:58,597 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-08 17:11:07,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:11:07,325 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2024-11-08 17:11:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 17:11:07,325 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2024-11-08 17:11:07,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:11:07,326 INFO L225 Difference]: With dead ends: 97 [2024-11-08 17:11:07,326 INFO L226 Difference]: Without dead ends: 81 [2024-11-08 17:11:07,327 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=128, Invalid=741, Unknown=1, NotChecked=0, Total=870 [2024-11-08 17:11:07,327 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 12 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-08 17:11:07,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 489 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-08 17:11:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-08 17:11:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2024-11-08 17:11:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 62 states have (on average 1.096774193548387) internal successors, (68), 63 states have internal predecessors, (68), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 17:11:07,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2024-11-08 17:11:07,335 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 74 [2024-11-08 17:11:07,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:11:07,336 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2024-11-08 17:11:07,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-08 17:11:07,336 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2024-11-08 17:11:07,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-08 17:11:07,337 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:11:07,337 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:11:07,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2024-11-08 17:11:07,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-08 17:11:07,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:11:07,738 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:11:07,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:11:07,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1018367962, now seen corresponding path program 1 times [2024-11-08 17:11:07,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:11:07,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609213045] [2024-11-08 17:11:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:11:07,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:11:07,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:11:07,740 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:11:07,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccf284a8-b711-4849-b094-eab7d0ae7476/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-08 17:11:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:11:07,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-08 17:11:07,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:11:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 17:11:13,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:11:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 17:11:24,130 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:11:24,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609213045] [2024-11-08 17:11:24,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609213045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:11:24,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:11:24,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2024-11-08 17:11:24,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231656525] [2024-11-08 17:11:24,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:11:24,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-08 17:11:24,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:11:24,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-08 17:11:24,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2024-11-08 17:11:24,133 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 29 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-08 17:11:29,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []