./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU --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 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:59:28,363 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:59:28,462 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 21:59:28,469 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:59:28,471 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:59:28,496 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:59:28,497 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:59:28,497 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:59:28,498 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:59:28,498 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:59:28,499 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:59:28,499 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:59:28,500 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:59:28,501 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:59:28,501 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:59:28,503 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:59:28,503 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 21:59:28,504 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:59:28,504 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:59:28,504 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:59:28,505 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:59:28,509 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 21:59:28,509 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:59:28,510 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 21:59:28,510 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:59:28,511 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:59:28,511 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 21:59:28,512 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:59:28,512 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:59:28,512 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:59:28,513 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:59:28,513 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:59:28,514 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:59:28,514 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:59:28,515 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:59:28,515 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 21:59:28,515 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:59:28,516 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:59:28,516 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:59:28,517 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:59:28,517 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:59:28,517 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:59:28,518 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_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 [2024-10-31 21:59:28,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:59:29,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:59:29,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:59:29,021 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:59:29,025 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:59:29,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c Unable to find full path for "g++" [2024-10-31 21:59:31,177 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:59:31,431 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:59:31,432 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2024-10-31 21:59:31,443 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/data/98efbeec7/845fef05f8c145deac6a3eeed517af04/FLAG6c0109ff8 [2024-10-31 21:59:31,755 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/data/98efbeec7/845fef05f8c145deac6a3eeed517af04 [2024-10-31 21:59:31,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:59:31,759 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:59:31,760 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:59:31,761 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:59:31,769 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:59:31,772 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:59:31" (1/1) ... [2024-10-31 21:59:31,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67055ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:31, skipping insertion in model container [2024-10-31 21:59:31,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:59:31" (1/1) ... [2024-10-31 21:59:31,801 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:59:32,027 WARN L251 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_7b3c9b1a-35f9-4827-bea8-4bc65d211827/sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c[1067,1080] [2024-10-31 21:59:32,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:59:32,063 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:59:32,076 WARN L251 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_7b3c9b1a-35f9-4827-bea8-4bc65d211827/sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c[1067,1080] [2024-10-31 21:59:32,091 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:59:32,110 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:59:32,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:32 WrapperNode [2024-10-31 21:59:32,111 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:59:32,113 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:59:32,113 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:59:32,113 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:59:32,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:32" (1/1) ... [2024-10-31 21:59:32,140 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:32" (1/1) ... [2024-10-31 21:59:32,163 INFO L138 Inliner]: procedures = 17, calls = 90, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2024-10-31 21:59:32,163 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:59:32,164 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:59:32,164 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:59:32,164 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:59:32,176 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:32" (1/1) ... [2024-10-31 21:59:32,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:32" (1/1) ... [2024-10-31 21:59:32,179 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:32" (1/1) ... [2024-10-31 21:59:32,198 INFO L175 MemorySlicer]: Split 56 memory accesses to 8 slices as follows [2, 8, 12, 6, 5, 6, 8, 9]. 21 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 0, 3, 2, 1, 1, 2, 3]. [2024-10-31 21:59:32,198 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:32" (1/1) ... [2024-10-31 21:59:32,198 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:32" (1/1) ... [2024-10-31 21:59:32,208 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:32" (1/1) ... [2024-10-31 21:59:32,213 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:32" (1/1) ... [2024-10-31 21:59:32,216 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:32" (1/1) ... [2024-10-31 21:59:32,218 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:32" (1/1) ... [2024-10-31 21:59:32,221 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:59:32,222 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:59:32,222 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:59:32,223 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:59:32,224 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:32" (1/1) ... [2024-10-31 21:59:32,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:59:32,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:32,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:59:32,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:59:32,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:59:32,304 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_50_0 [2024-10-31 21:59:32,304 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_50_0 [2024-10-31 21:59:32,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:59:32,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 21:59:32,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 21:59:32,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-31 21:59:32,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-31 21:59:32,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-31 21:59:32,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-31 21:59:32,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-10-31 21:59:32,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 21:59:32,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 21:59:32,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 21:59:32,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 21:59:32,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-31 21:59:32,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-31 21:59:32,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-31 21:59:32,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-31 21:59:32,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-10-31 21:59:32,308 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_30_to_37_0 [2024-10-31 21:59:32,308 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_30_to_37_0 [2024-10-31 21:59:32,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:59:32,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:59:32,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 21:59:32,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 21:59:32,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 21:59:32,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-31 21:59:32,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-31 21:59:32,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-31 21:59:32,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-31 21:59:32,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-10-31 21:59:32,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 21:59:32,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 21:59:32,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 21:59:32,440 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:59:32,442 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:59:32,821 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-10-31 21:59:32,821 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:59:32,862 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:59:32,863 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 21:59:32,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:59:32 BoogieIcfgContainer [2024-10-31 21:59:32,863 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:59:32,868 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:59:32,869 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:59:32,873 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:59:32,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:59:31" (1/3) ... [2024-10-31 21:59:32,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1139b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:59:32, skipping insertion in model container [2024-10-31 21:59:32,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:32" (2/3) ... [2024-10-31 21:59:32,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1139b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:59:32, skipping insertion in model container [2024-10-31 21:59:32,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:59:32" (3/3) ... [2024-10-31 21:59:32,877 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard2.c [2024-10-31 21:59:32,911 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:59:32,911 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 21:59:32,983 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:59:32,989 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;@5dc773cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:59:32,990 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 21:59:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.28) internal successors, (32), 28 states have internal predecessors, (32), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-31 21:59:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-31 21:59:33,001 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:33,002 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:33,002 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:33,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:33,007 INFO L85 PathProgramCache]: Analyzing trace with hash -755414079, now seen corresponding path program 1 times [2024-10-31 21:59:33,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:33,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206104047] [2024-10-31 21:59:33,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:33,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:33,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:33,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206104047] [2024-10-31 21:59:33,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206104047] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:33,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:59:33,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-31 21:59:33,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006546178] [2024-10-31 21:59:33,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:33,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 21:59:33,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:33,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 21:59:33,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 21:59:33,954 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.28) internal successors, (32), 28 states have internal predecessors, (32), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:34,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:34,330 INFO L93 Difference]: Finished difference Result 83 states and 119 transitions. [2024-10-31 21:59:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 21:59:34,338 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-31 21:59:34,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:34,356 INFO L225 Difference]: With dead ends: 83 [2024-10-31 21:59:34,360 INFO L226 Difference]: Without dead ends: 41 [2024-10-31 21:59:34,370 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:59:34,380 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 18 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:34,387 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 246 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 21:59:34,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-31 21:59:34,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-10-31 21:59:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 21:59:34,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2024-10-31 21:59:34,497 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 9 [2024-10-31 21:59:34,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:34,498 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2024-10-31 21:59:34,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2024-10-31 21:59:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-31 21:59:34,499 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:34,499 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:34,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:59:34,500 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:34,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:34,501 INFO L85 PathProgramCache]: Analyzing trace with hash -682913725, now seen corresponding path program 1 times [2024-10-31 21:59:34,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:34,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964819206] [2024-10-31 21:59:34,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:34,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:34,931 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-31 21:59:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:34,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:34,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964819206] [2024-10-31 21:59:34,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964819206] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:34,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:59:34,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-31 21:59:34,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294526564] [2024-10-31 21:59:34,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:34,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 21:59:34,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:34,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 21:59:34,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 21:59:34,953 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-31 21:59:35,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:35,231 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2024-10-31 21:59:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 21:59:35,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-10-31 21:59:35,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:35,234 INFO L225 Difference]: With dead ends: 47 [2024-10-31 21:59:35,234 INFO L226 Difference]: Without dead ends: 45 [2024-10-31 21:59:35,234 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:59:35,235 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:35,238 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 226 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 21:59:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-31 21:59:35,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-31 21:59:35,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 21:59:35,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2024-10-31 21:59:35,262 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 15 [2024-10-31 21:59:35,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:35,263 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2024-10-31 21:59:35,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-31 21:59:35,264 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2024-10-31 21:59:35,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-31 21:59:35,265 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:35,265 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:35,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:59:35,267 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:35,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:35,269 INFO L85 PathProgramCache]: Analyzing trace with hash -565463997, now seen corresponding path program 1 times [2024-10-31 21:59:35,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:35,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139270163] [2024-10-31 21:59:35,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:35,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:59:35,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409047040] [2024-10-31 21:59:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:35,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:35,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:35,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:35,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:59:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:35,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-31 21:59:35,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:35,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-31 21:59:35,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:59:35,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:59:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 21:59:36,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 21:59:36,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:36,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139270163] [2024-10-31 21:59:36,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:59:36,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409047040] [2024-10-31 21:59:36,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409047040] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:36,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:59:36,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-10-31 21:59:36,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124817646] [2024-10-31 21:59:36,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:36,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 21:59:36,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:36,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 21:59:36,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-10-31 21:59:36,453 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 21:59:36,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:36,839 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2024-10-31 21:59:36,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 21:59:36,841 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-10-31 21:59:36,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:36,844 INFO L225 Difference]: With dead ends: 56 [2024-10-31 21:59:36,844 INFO L226 Difference]: Without dead ends: 54 [2024-10-31 21:59:36,845 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-10-31 21:59:36,846 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 15 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:36,847 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 218 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 21:59:36,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-31 21:59:36,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2024-10-31 21:59:36,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 21:59:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2024-10-31 21:59:36,862 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 21 [2024-10-31 21:59:36,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:36,863 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2024-10-31 21:59:36,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 21:59:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2024-10-31 21:59:36,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-31 21:59:36,865 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:36,865 INFO L215 NwaCegarLoop]: trace histogram [4, 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] [2024-10-31 21:59:36,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 21:59:37,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:37,066 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:37,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:37,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1188632215, now seen corresponding path program 1 times [2024-10-31 21:59:37,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:37,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634871971] [2024-10-31 21:59:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:37,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:59:37,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911842444] [2024-10-31 21:59:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:37,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:37,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:37,148 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:37,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:59:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:37,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-31 21:59:37,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:37,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-31 21:59:37,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:59:37,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 21:59:37,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 21:59:37,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 21:59:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 21:59:37,832 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 21:59:38,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:38,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634871971] [2024-10-31 21:59:38,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:59:38,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911842444] [2024-10-31 21:59:38,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911842444] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:38,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:59:38,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2024-10-31 21:59:38,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007183693] [2024-10-31 21:59:38,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:38,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 21:59:38,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:38,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 21:59:38,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:59:38,045 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 21:59:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:38,323 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2024-10-31 21:59:38,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 21:59:38,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-10-31 21:59:38,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:38,327 INFO L225 Difference]: With dead ends: 69 [2024-10-31 21:59:38,328 INFO L226 Difference]: Without dead ends: 67 [2024-10-31 21:59:38,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-31 21:59:38,330 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:38,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 244 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 21:59:38,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-31 21:59:38,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-10-31 21:59:38,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 46 states have internal predecessors, (48), 14 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2024-10-31 21:59:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2024-10-31 21:59:38,359 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 33 [2024-10-31 21:59:38,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:38,359 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2024-10-31 21:59:38,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 21:59:38,360 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2024-10-31 21:59:38,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-31 21:59:38,361 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:38,362 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:38,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 21:59:38,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:38,566 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:38,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:38,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2141026318, now seen corresponding path program 1 times [2024-10-31 21:59:38,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:38,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694936114] [2024-10-31 21:59:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:38,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:59:38,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834078827] [2024-10-31 21:59:38,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:38,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:38,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:38,648 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:38,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:59:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:38,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-31 21:59:38,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:38,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:59:38,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:59:38,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:59:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 21:59:39,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:40,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:40,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694936114] [2024-10-31 21:59:40,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:59:40,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834078827] [2024-10-31 21:59:40,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834078827] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:40,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:59:40,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-10-31 21:59:40,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844483882] [2024-10-31 21:59:40,563 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:40,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 21:59:40,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:40,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 21:59:40,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-10-31 21:59:40,565 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 21:59:41,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:41,444 INFO L93 Difference]: Finished difference Result 123 states and 140 transitions. [2024-10-31 21:59:41,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 21:59:41,445 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2024-10-31 21:59:41,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:41,446 INFO L225 Difference]: With dead ends: 123 [2024-10-31 21:59:41,447 INFO L226 Difference]: Without dead ends: 121 [2024-10-31 21:59:41,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2024-10-31 21:59:41,450 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:41,450 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 128 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 21:59:41,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-31 21:59:41,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2024-10-31 21:59:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 81 states have internal predecessors, (86), 22 states have call successors, (22), 16 states have call predecessors, (22), 19 states have return successors, (29), 21 states have call predecessors, (29), 20 states have call successors, (29) [2024-10-31 21:59:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2024-10-31 21:59:41,500 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 39 [2024-10-31 21:59:41,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:41,500 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2024-10-31 21:59:41,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 21:59:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2024-10-31 21:59:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 21:59:41,504 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:41,504 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:41,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 21:59:41,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:41,711 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:41,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:41,712 INFO L85 PathProgramCache]: Analyzing trace with hash -684202243, now seen corresponding path program 1 times [2024-10-31 21:59:41,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:41,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710695175] [2024-10-31 21:59:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:41,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:59:41,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435379783] [2024-10-31 21:59:41,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:41,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:41,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:41,754 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:41,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:59:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:41,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 21:59:41,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:41,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:59:41,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-31 21:59:42,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:59:42,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 21:59:42,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 21:59:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 21:59:42,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:42,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:42,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710695175] [2024-10-31 21:59:42,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:59:42,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435379783] [2024-10-31 21:59:42,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435379783] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:42,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:59:42,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-10-31 21:59:42,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812603492] [2024-10-31 21:59:42,702 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:42,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 21:59:42,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:42,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 21:59:42,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:59:42,704 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 21:59:43,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:43,320 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2024-10-31 21:59:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 21:59:43,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2024-10-31 21:59:43,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:43,327 INFO L225 Difference]: With dead ends: 144 [2024-10-31 21:59:43,327 INFO L226 Difference]: Without dead ends: 140 [2024-10-31 21:59:43,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-31 21:59:43,328 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:43,329 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 80 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 21:59:43,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-10-31 21:59:43,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2024-10-31 21:59:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 87 states have (on average 1.103448275862069) internal successors, (96), 91 states have internal predecessors, (96), 25 states have call successors, (25), 19 states have call predecessors, (25), 21 states have return successors, (32), 24 states have call predecessors, (32), 22 states have call successors, (32) [2024-10-31 21:59:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 153 transitions. [2024-10-31 21:59:43,389 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 153 transitions. Word has length 49 [2024-10-31 21:59:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:43,390 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 153 transitions. [2024-10-31 21:59:43,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-31 21:59:43,390 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 153 transitions. [2024-10-31 21:59:43,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-31 21:59:43,392 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:43,392 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 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] [2024-10-31 21:59:43,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-31 21:59:43,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 21:59:43,593 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:43,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:43,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1621802541, now seen corresponding path program 1 times [2024-10-31 21:59:43,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:43,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75919506] [2024-10-31 21:59:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:43,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:44,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 21:59:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:44,067 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 21:59:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:44,073 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 21:59:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:44,079 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-31 21:59:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:44,088 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-31 21:59:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:44,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-31 21:59:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-31 21:59:44,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:44,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75919506] [2024-10-31 21:59:44,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75919506] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:44,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:59:44,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-31 21:59:44,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862034350] [2024-10-31 21:59:44,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:44,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 21:59:44,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:44,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 21:59:44,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-31 21:59:44,106 INFO L87 Difference]: Start difference. First operand 134 states and 153 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 21:59:44,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:44,425 INFO L93 Difference]: Finished difference Result 189 states and 219 transitions. [2024-10-31 21:59:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 21:59:44,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 50 [2024-10-31 21:59:44,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:44,428 INFO L225 Difference]: With dead ends: 189 [2024-10-31 21:59:44,429 INFO L226 Difference]: Without dead ends: 136 [2024-10-31 21:59:44,429 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:59:44,430 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 52 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:44,431 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 98 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 21:59:44,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-10-31 21:59:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2024-10-31 21:59:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 90 states have internal predecessors, (94), 25 states have call successors, (25), 19 states have call predecessors, (25), 20 states have return successors, (28), 24 states have call predecessors, (28), 22 states have call successors, (28) [2024-10-31 21:59:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 147 transitions. [2024-10-31 21:59:44,491 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 147 transitions. Word has length 50 [2024-10-31 21:59:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:44,491 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 147 transitions. [2024-10-31 21:59:44,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 21:59:44,492 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 147 transitions. [2024-10-31 21:59:44,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-31 21:59:44,493 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:44,494 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:44,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 21:59:44,494 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:44,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:44,495 INFO L85 PathProgramCache]: Analyzing trace with hash 377968636, now seen corresponding path program 1 times [2024-10-31 21:59:44,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:44,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492029743] [2024-10-31 21:59:44,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:44,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:44,849 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 21:59:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:44,910 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 21:59:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:44,919 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 21:59:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:44,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-31 21:59:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:44,949 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-31 21:59:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:44,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 21:59:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:44,988 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 21:59:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:44,993 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-10-31 21:59:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-31 21:59:45,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:45,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492029743] [2024-10-31 21:59:45,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492029743] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:45,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:59:45,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-31 21:59:45,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611762837] [2024-10-31 21:59:45,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:45,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 21:59:45,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:45,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 21:59:45,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:59:45,007 INFO L87 Difference]: Start difference. First operand 132 states and 147 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-31 21:59:45,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:45,365 INFO L93 Difference]: Finished difference Result 138 states and 154 transitions. [2024-10-31 21:59:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 21:59:45,366 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2024-10-31 21:59:45,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:45,368 INFO L225 Difference]: With dead ends: 138 [2024-10-31 21:59:45,368 INFO L226 Difference]: Without dead ends: 106 [2024-10-31 21:59:45,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:59:45,369 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:45,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 79 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 21:59:45,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-31 21:59:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2024-10-31 21:59:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 66 states have (on average 1.106060606060606) internal successors, (73), 70 states have internal predecessors, (73), 20 states have call successors, (20), 14 states have call predecessors, (20), 15 states have return successors, (23), 19 states have call predecessors, (23), 18 states have call successors, (23) [2024-10-31 21:59:45,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2024-10-31 21:59:45,398 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 55 [2024-10-31 21:59:45,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:45,398 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2024-10-31 21:59:45,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-31 21:59:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2024-10-31 21:59:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-31 21:59:45,400 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:45,400 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:45,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 21:59:45,401 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:45,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:45,401 INFO L85 PathProgramCache]: Analyzing trace with hash 380342299, now seen corresponding path program 1 times [2024-10-31 21:59:45,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:45,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11102126] [2024-10-31 21:59:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:45,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:59:45,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162189639] [2024-10-31 21:59:45,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:45,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:45,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:45,449 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:45,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:59:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:45,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-10-31 21:59:45,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:45,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:59:45,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-31 21:59:45,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:59:46,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 21:59:46,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 21:59:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-10-31 21:59:46,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:47,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:47,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11102126] [2024-10-31 21:59:47,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:59:47,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162189639] [2024-10-31 21:59:47,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162189639] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:47,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:59:47,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-31 21:59:47,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552609037] [2024-10-31 21:59:47,446 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:47,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 21:59:47,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:47,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 21:59:47,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-10-31 21:59:47,448 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand has 15 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-10-31 21:59:48,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:48,966 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2024-10-31 21:59:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-31 21:59:48,967 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 63 [2024-10-31 21:59:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:48,970 INFO L225 Difference]: With dead ends: 142 [2024-10-31 21:59:48,973 INFO L226 Difference]: Without dead ends: 138 [2024-10-31 21:59:48,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2024-10-31 21:59:48,975 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 34 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:48,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 144 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 470 Invalid, 2 Unknown, 0 Unchecked, 1.1s Time] [2024-10-31 21:59:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-10-31 21:59:49,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2024-10-31 21:59:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 90 states have internal predecessors, (95), 25 states have call successors, (25), 19 states have call predecessors, (25), 21 states have return successors, (33), 25 states have call predecessors, (33), 22 states have call successors, (33) [2024-10-31 21:59:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 153 transitions. [2024-10-31 21:59:49,067 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 153 transitions. Word has length 63 [2024-10-31 21:59:49,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:49,067 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 153 transitions. [2024-10-31 21:59:49,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-10-31 21:59:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 153 transitions. [2024-10-31 21:59:49,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-10-31 21:59:49,078 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:49,078 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:49,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 21:59:49,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:49,279 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:49,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:49,280 INFO L85 PathProgramCache]: Analyzing trace with hash -941273112, now seen corresponding path program 2 times [2024-10-31 21:59:49,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:49,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19856892] [2024-10-31 21:59:49,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:49,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:59:49,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387222414] [2024-10-31 21:59:49,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:59:49,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:49,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:49,354 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:49,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 21:59:49,566 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:59:49,566 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:59:49,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-10-31 21:59:49,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:49,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:59:49,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-31 21:59:49,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:59:50,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 21:59:50,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 21:59:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 36 proven. 43 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-10-31 21:59:51,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:52,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:52,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19856892] [2024-10-31 21:59:52,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:59:52,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387222414] [2024-10-31 21:59:52,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387222414] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:52,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:59:52,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-31 21:59:52,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740109547] [2024-10-31 21:59:52,493 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:52,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 21:59:52,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:52,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 21:59:52,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-10-31 21:59:52,495 INFO L87 Difference]: Start difference. First operand 134 states and 153 transitions. Second operand has 16 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-10-31 21:59:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:53,955 INFO L93 Difference]: Finished difference Result 172 states and 195 transitions. [2024-10-31 21:59:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 21:59:53,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 87 [2024-10-31 21:59:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:53,957 INFO L225 Difference]: With dead ends: 172 [2024-10-31 21:59:53,958 INFO L226 Difference]: Without dead ends: 168 [2024-10-31 21:59:53,960 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2024-10-31 21:59:53,961 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 43 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:53,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 228 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 664 Invalid, 1 Unknown, 0 Unchecked, 1.1s Time] [2024-10-31 21:59:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-10-31 21:59:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2024-10-31 21:59:54,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 91 states have internal predecessors, (96), 25 states have call successors, (25), 19 states have call predecessors, (25), 22 states have return successors, (35), 26 states have call predecessors, (35), 22 states have call successors, (35) [2024-10-31 21:59:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2024-10-31 21:59:54,019 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 87 [2024-10-31 21:59:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:54,020 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2024-10-31 21:59:54,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-10-31 21:59:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2024-10-31 21:59:54,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-10-31 21:59:54,022 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:54,022 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:54,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 21:59:54,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 21:59:54,223 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:54,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:54,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2016753803, now seen corresponding path program 3 times [2024-10-31 21:59:54,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:54,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126449330] [2024-10-31 21:59:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:54,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:59:54,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135380917] [2024-10-31 21:59:54,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 21:59:54,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:54,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:54,300 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:54,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 21:59:54,652 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-31 21:59:54,652 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:59:54,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-10-31 21:59:54,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:54,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-31 21:59:54,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:59:54,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:59:55,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 21:59:55,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 21:59:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 48 proven. 64 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2024-10-31 21:59:56,312 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:57,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:57,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126449330] [2024-10-31 21:59:57,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:59:57,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135380917] [2024-10-31 21:59:57,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135380917] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:57,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:59:57,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-31 21:59:57,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856415032] [2024-10-31 21:59:57,893 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:57,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 21:59:57,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:57,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 21:59:57,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2024-10-31 21:59:57,894 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand has 18 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 15 states have internal predecessors, (31), 8 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2024-10-31 21:59:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:59,661 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2024-10-31 21:59:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-31 21:59:59,662 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 15 states have internal predecessors, (31), 8 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 111 [2024-10-31 21:59:59,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:59,665 INFO L225 Difference]: With dead ends: 174 [2024-10-31 21:59:59,666 INFO L226 Difference]: Without dead ends: 170 [2024-10-31 21:59:59,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2024-10-31 21:59:59,668 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 43 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:59,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 241 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 735 Invalid, 1 Unknown, 0 Unchecked, 1.2s Time] [2024-10-31 21:59:59,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-10-31 21:59:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 138. [2024-10-31 21:59:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 92 states have internal predecessors, (97), 25 states have call successors, (25), 19 states have call predecessors, (25), 23 states have return successors, (37), 27 states have call predecessors, (37), 22 states have call successors, (37) [2024-10-31 21:59:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 159 transitions. [2024-10-31 21:59:59,725 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 159 transitions. Word has length 111 [2024-10-31 21:59:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:59,725 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 159 transitions. [2024-10-31 21:59:59,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 15 states have internal predecessors, (31), 8 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2024-10-31 21:59:59,726 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 159 transitions. [2024-10-31 21:59:59,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-10-31 21:59:59,729 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:59,729 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:59,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 21:59:59,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-31 21:59:59,930 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:59,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:59,930 INFO L85 PathProgramCache]: Analyzing trace with hash 974653122, now seen corresponding path program 4 times [2024-10-31 21:59:59,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:59,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830522203] [2024-10-31 21:59:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:59,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:59:59,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776902217] [2024-10-31 21:59:59,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 21:59:59,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:59,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:59,997 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:59,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b3c9b1a-35f9-4827-bea8-4bc65d211827/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:00:00,949 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:00:00,949 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:00,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 219 conjuncts are in the unsatisfiable core [2024-10-31 22:00:00,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:01,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-10-31 22:00:01,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2024-10-31 22:00:01,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2024-10-31 22:00:01,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11