./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/lunarlander_18_unsafe.c-amalgamation.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/neural-networks/lunarlander_18_unsafe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 703095d49abcb60068ecab8f99a36aacf7930f94e2724844e603401a0493fe0e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:54:53,085 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:54:53,153 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:54:53,159 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:54:53,160 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:54:53,185 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:54:53,186 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:54:53,186 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:54:53,187 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:54:53,188 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:54:53,188 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:54:53,189 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:54:53,190 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:54:53,190 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:54:53,191 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:54:53,191 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:54:53,192 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:54:53,192 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:54:53,193 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:54:53,194 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:54:53,194 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:54:53,198 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:54:53,198 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:54:53,199 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:54:53,199 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:54:53,199 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:54:53,200 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:54:53,200 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:54:53,201 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:54:53,201 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:54:53,201 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:54:53,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:54:53,202 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:54:53,202 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:54:53,202 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:54:53,203 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:54:53,203 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:54:53,203 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:54:53,203 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:54:53,203 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:54:53,203 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:54:53,204 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:54:53,204 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_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 703095d49abcb60068ecab8f99a36aacf7930f94e2724844e603401a0493fe0e [2023-11-29 00:54:53,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:54:53,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:54:53,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:54:53,473 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:54:53,474 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:54:53,475 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/neural-networks/lunarlander_18_unsafe.c-amalgamation.i [2023-11-29 00:54:56,234 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:54:56,570 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:54:56,571 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/sv-benchmarks/c/neural-networks/lunarlander_18_unsafe.c-amalgamation.i [2023-11-29 00:54:56,604 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/data/3a7d32462/18e07ce6223546c79d52408634a58d61/FLAG77f99c8a6 [2023-11-29 00:54:56,790 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/data/3a7d32462/18e07ce6223546c79d52408634a58d61 [2023-11-29 00:54:56,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:54:56,794 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:54:56,795 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:54:56,795 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:54:56,800 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:54:56,801 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:54:56" (1/1) ... [2023-11-29 00:54:56,802 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cab6b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:54:56, skipping insertion in model container [2023-11-29 00:54:56,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:54:56" (1/1) ... [2023-11-29 00:54:56,888 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:54:57,580 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/sv-benchmarks/c/neural-networks/lunarlander_18_unsafe.c-amalgamation.i[64321,64334] [2023-11-29 00:54:57,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:54:57,948 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:54:57,992 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/sv-benchmarks/c/neural-networks/lunarlander_18_unsafe.c-amalgamation.i[64321,64334] [2023-11-29 00:54:58,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:54:58,286 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:54:58,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:54:58 WrapperNode [2023-11-29 00:54:58,286 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:54:58,287 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:54:58,287 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:54:58,288 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:54:58,293 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:54:58" (1/1) ... [2023-11-29 00:54:58,357 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:54:58" (1/1) ... [2023-11-29 00:54:58,558 INFO L138 Inliner]: procedures = 620, calls = 5148, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 5469 [2023-11-29 00:54:58,558 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:54:58,559 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:54:58,559 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:54:58,559 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:54:58,568 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:54:58" (1/1) ... [2023-11-29 00:54:58,568 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:54:58" (1/1) ... [2023-11-29 00:54:58,607 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:54:58" (1/1) ... [2023-11-29 00:54:58,657 INFO L175 MemorySlicer]: Split 5123 memory accesses to 12 slices as follows [2, 7, 513, 65, 4097, 65, 257, 3, 5, 14, 70, 25]. 80 percent of accesses are in the largest equivalence class. The 5077 initializations are split as follows [2, 7, 512, 64, 4096, 64, 256, 0, 4, 8, 64, 0]. The 14 writes are split as follows [0, 0, 0, 0, 0, 0, 0, 1, 0, 3, 2, 8]. [2023-11-29 00:54:58,657 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:54:58" (1/1) ... [2023-11-29 00:54:58,657 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:54:58" (1/1) ... [2023-11-29 00:54:58,782 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:54:58" (1/1) ... [2023-11-29 00:54:58,794 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:54:58" (1/1) ... [2023-11-29 00:54:58,820 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:54:58" (1/1) ... [2023-11-29 00:54:58,831 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:54:58" (1/1) ... [2023-11-29 00:54:58,865 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:54:58,866 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:54:58,866 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:54:58,866 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:54:58,867 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:54:58" (1/1) ... [2023-11-29 00:54:58,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:54:58,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:54:58,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:54:58,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:54:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2023-11-29 00:54:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2023-11-29 00:54:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2023-11-29 00:54:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#3 [2023-11-29 00:54:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#4 [2023-11-29 00:54:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#5 [2023-11-29 00:54:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#6 [2023-11-29 00:54:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#7 [2023-11-29 00:54:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#8 [2023-11-29 00:54:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#9 [2023-11-29 00:54:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#10 [2023-11-29 00:54:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#11 [2023-11-29 00:54:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:54:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#0 [2023-11-29 00:54:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#1 [2023-11-29 00:54:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#2 [2023-11-29 00:54:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#3 [2023-11-29 00:54:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#4 [2023-11-29 00:54:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#5 [2023-11-29 00:54:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#6 [2023-11-29 00:54:58,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#7 [2023-11-29 00:54:58,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#8 [2023-11-29 00:54:58,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#9 [2023-11-29 00:54:58,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#10 [2023-11-29 00:54:58,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#11 [2023-11-29 00:54:58,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#0 [2023-11-29 00:54:58,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#1 [2023-11-29 00:54:58,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#2 [2023-11-29 00:54:58,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#3 [2023-11-29 00:54:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#4 [2023-11-29 00:54:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#5 [2023-11-29 00:54:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#6 [2023-11-29 00:54:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#7 [2023-11-29 00:54:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#8 [2023-11-29 00:54:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#9 [2023-11-29 00:54:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#10 [2023-11-29 00:54:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#11 [2023-11-29 00:54:58,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:54:58,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:54:58,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:54:58,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:54:58,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:54:58,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:54:58,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:54:58,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:54:58,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 00:54:58,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 00:54:58,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-29 00:54:58,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-29 00:54:58,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-29 00:54:58,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-29 00:54:58,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-29 00:54:58,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-29 00:54:59,145 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:54:59,147 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:55:06,127 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:55:06,517 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:55:06,518 INFO L309 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-29 00:55:06,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:55:06 BoogieIcfgContainer [2023-11-29 00:55:06,518 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:55:06,520 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:55:06,521 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:55:06,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:55:06,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:54:56" (1/3) ... [2023-11-29 00:55:06,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab5dd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:55:06, skipping insertion in model container [2023-11-29 00:55:06,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:54:58" (2/3) ... [2023-11-29 00:55:06,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab5dd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:55:06, skipping insertion in model container [2023-11-29 00:55:06,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:55:06" (3/3) ... [2023-11-29 00:55:06,527 INFO L112 eAbstractionObserver]: Analyzing ICFG lunarlander_18_unsafe.c-amalgamation.i [2023-11-29 00:55:06,546 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:55:06,547 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:55:06,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:55:06,605 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@32c7be2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:55:06,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:55:06,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 56 states have (on average 1.7857142857142858) internal successors, (100), 57 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 00:55:06,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:06,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:06,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:06,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:06,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1219428462, now seen corresponding path program 1 times [2023-11-29 00:55:06,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:06,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365032280] [2023-11-29 00:55:06,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:06,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:55:07,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:07,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365032280] [2023-11-29 00:55:07,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365032280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:55:07,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:55:07,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:55:07,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448015961] [2023-11-29 00:55:07,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:07,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:55:07,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:07,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:55:07,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:55:07,854 INFO L87 Difference]: Start difference. First operand has 58 states, 56 states have (on average 1.7857142857142858) internal successors, (100), 57 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:08,260 INFO L93 Difference]: Finished difference Result 113 states and 195 transitions. [2023-11-29 00:55:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:55:08,263 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-29 00:55:08,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:08,269 INFO L225 Difference]: With dead ends: 113 [2023-11-29 00:55:08,270 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 00:55:08,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:55:08,275 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:08,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:55:08,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 00:55:08,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-29 00:55:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.4) internal successors, (77), 55 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:08,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 77 transitions. [2023-11-29 00:55:08,307 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 77 transitions. Word has length 39 [2023-11-29 00:55:08,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:08,307 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 77 transitions. [2023-11-29 00:55:08,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:08,308 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 77 transitions. [2023-11-29 00:55:08,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 00:55:08,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:08,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:08,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:55:08,310 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:08,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:08,311 INFO L85 PathProgramCache]: Analyzing trace with hash -481557306, now seen corresponding path program 1 times [2023-11-29 00:55:08,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:08,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933647418] [2023-11-29 00:55:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:08,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:55:09,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:09,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933647418] [2023-11-29 00:55:09,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933647418] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:55:09,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:55:09,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:55:09,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141441859] [2023-11-29 00:55:09,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:09,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:55:09,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:09,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:55:09,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:55:09,204 INFO L87 Difference]: Start difference. First operand 56 states and 77 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:09,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:09,818 INFO L93 Difference]: Finished difference Result 104 states and 143 transitions. [2023-11-29 00:55:09,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:55:09,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-29 00:55:09,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:09,820 INFO L225 Difference]: With dead ends: 104 [2023-11-29 00:55:09,820 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 00:55:09,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:55:09,823 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:09,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:55:09,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 00:55:09,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-29 00:55:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 55 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2023-11-29 00:55:09,831 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 39 [2023-11-29 00:55:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:09,832 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2023-11-29 00:55:09,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:09,832 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2023-11-29 00:55:09,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 00:55:09,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:09,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:09,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:55:09,834 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:09,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:09,835 INFO L85 PathProgramCache]: Analyzing trace with hash -756316920, now seen corresponding path program 1 times [2023-11-29 00:55:09,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:09,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322001598] [2023-11-29 00:55:09,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:09,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:55:11,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:11,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322001598] [2023-11-29 00:55:11,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322001598] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:55:11,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:55:11,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:55:11,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262661391] [2023-11-29 00:55:11,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:11,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:55:11,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:11,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:55:11,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:55:11,130 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:11,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:11,796 INFO L93 Difference]: Finished difference Result 87 states and 120 transitions. [2023-11-29 00:55:11,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:55:11,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-29 00:55:11,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:11,798 INFO L225 Difference]: With dead ends: 87 [2023-11-29 00:55:11,798 INFO L226 Difference]: Without dead ends: 57 [2023-11-29 00:55:11,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:55:11,800 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:11,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:55:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-29 00:55:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-29 00:55:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.375) internal successors, (77), 56 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2023-11-29 00:55:11,807 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 39 [2023-11-29 00:55:11,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:11,807 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2023-11-29 00:55:11,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:11,807 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2023-11-29 00:55:11,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 00:55:11,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:11,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:11,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:55:11,809 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:11,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:11,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1790905389, now seen corresponding path program 1 times [2023-11-29 00:55:11,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:11,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061339329] [2023-11-29 00:55:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:11,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:55:12,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:12,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061339329] [2023-11-29 00:55:12,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061339329] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:12,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226306299] [2023-11-29 00:55:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:12,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:12,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:12,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:12,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:55:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:14,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 6102 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:55:14,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:55:14,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:55:14,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226306299] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:14,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:55:14,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 00:55:14,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955402653] [2023-11-29 00:55:14,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:14,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:55:14,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:14,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:55:14,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:55:14,645 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:15,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:15,142 INFO L93 Difference]: Finished difference Result 78 states and 106 transitions. [2023-11-29 00:55:15,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:55:15,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-29 00:55:15,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:15,143 INFO L225 Difference]: With dead ends: 78 [2023-11-29 00:55:15,143 INFO L226 Difference]: Without dead ends: 58 [2023-11-29 00:55:15,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:55:15,145 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 3 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:15,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 108 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:55:15,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-29 00:55:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-11-29 00:55:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.368421052631579) internal successors, (78), 57 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2023-11-29 00:55:15,150 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 40 [2023-11-29 00:55:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:15,150 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2023-11-29 00:55:15,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2023-11-29 00:55:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 00:55:15,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:15,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:15,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:55:15,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:15,352 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:15,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:15,352 INFO L85 PathProgramCache]: Analyzing trace with hash -793809956, now seen corresponding path program 1 times [2023-11-29 00:55:15,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:15,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5939397] [2023-11-29 00:55:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:15,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:55:16,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:16,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5939397] [2023-11-29 00:55:16,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5939397] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:16,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890377654] [2023-11-29 00:55:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:16,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:16,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:16,650 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:16,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:55:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:18,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 6120 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:55:18,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:55:18,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:55:18,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890377654] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:18,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:55:18,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 00:55:18,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968683423] [2023-11-29 00:55:18,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:18,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:55:18,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:18,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:55:18,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:55:18,152 INFO L87 Difference]: Start difference. First operand 58 states and 78 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:18,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:18,549 INFO L93 Difference]: Finished difference Result 69 states and 92 transitions. [2023-11-29 00:55:18,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:55:18,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-29 00:55:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:18,551 INFO L225 Difference]: With dead ends: 69 [2023-11-29 00:55:18,551 INFO L226 Difference]: Without dead ends: 59 [2023-11-29 00:55:18,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:55:18,552 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 3 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:18,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 108 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:55:18,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-29 00:55:18,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-29 00:55:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 58 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:18,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2023-11-29 00:55:18,558 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 43 [2023-11-29 00:55:18,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:18,558 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2023-11-29 00:55:18,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2023-11-29 00:55:18,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 00:55:18,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:18,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:18,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:55:18,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:18,760 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:18,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:18,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1367907231, now seen corresponding path program 1 times [2023-11-29 00:55:18,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:18,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587797341] [2023-11-29 00:55:18,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:18,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:55:19,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:19,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587797341] [2023-11-29 00:55:19,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587797341] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:19,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377222088] [2023-11-29 00:55:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:19,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:19,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:19,865 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:19,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:55:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:21,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 6138 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:55:21,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:55:21,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:55:21,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377222088] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:21,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:55:21,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 00:55:21,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007156564] [2023-11-29 00:55:21,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:21,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:55:21,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:21,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:55:21,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:55:21,295 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:21,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:21,781 INFO L93 Difference]: Finished difference Result 86 states and 116 transitions. [2023-11-29 00:55:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:55:21,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-11-29 00:55:21,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:21,782 INFO L225 Difference]: With dead ends: 86 [2023-11-29 00:55:21,782 INFO L226 Difference]: Without dead ends: 60 [2023-11-29 00:55:21,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:55:21,783 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:21,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 108 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:55:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-29 00:55:21,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-29 00:55:21,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 59 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:21,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2023-11-29 00:55:21,788 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 46 [2023-11-29 00:55:21,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:21,788 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2023-11-29 00:55:21,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:21,789 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2023-11-29 00:55:21,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 00:55:21,790 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:21,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:21,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:55:21,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 00:55:21,991 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:21,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:21,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1170803542, now seen corresponding path program 1 times [2023-11-29 00:55:21,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:21,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566051288] [2023-11-29 00:55:21,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:21,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:55:22,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:22,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566051288] [2023-11-29 00:55:22,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566051288] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:22,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034953199] [2023-11-29 00:55:22,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:22,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:22,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:22,896 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:22,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:55:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:24,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 6144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:55:24,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:55:24,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:55:24,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034953199] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:24,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:55:24,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-29 00:55:24,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186855698] [2023-11-29 00:55:24,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:24,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:55:24,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:24,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:55:24,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:55:24,217 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:24,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:24,651 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2023-11-29 00:55:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:55:24,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-29 00:55:24,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:24,653 INFO L225 Difference]: With dead ends: 76 [2023-11-29 00:55:24,653 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 00:55:24,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:55:24,654 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:24,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 108 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:55:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 00:55:24,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-29 00:55:24,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.35) internal successors, (81), 60 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:24,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2023-11-29 00:55:24,661 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 49 [2023-11-29 00:55:24,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:24,662 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2023-11-29 00:55:24,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:24,662 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2023-11-29 00:55:24,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 00:55:24,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:24,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:24,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:55:24,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:24,865 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:24,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:24,865 INFO L85 PathProgramCache]: Analyzing trace with hash 559835403, now seen corresponding path program 1 times [2023-11-29 00:55:24,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:24,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348174542] [2023-11-29 00:55:24,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:24,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:55:25,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:25,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348174542] [2023-11-29 00:55:25,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348174542] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:25,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613459241] [2023-11-29 00:55:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:25,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:25,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:25,738 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:25,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:55:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:27,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 6150 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:55:27,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:55:27,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:55:27,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613459241] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:27,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:55:27,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-29 00:55:27,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412149983] [2023-11-29 00:55:27,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:27,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:55:27,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:27,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:55:27,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:55:27,126 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:27,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:27,540 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2023-11-29 00:55:27,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:55:27,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-29 00:55:27,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:27,541 INFO L225 Difference]: With dead ends: 66 [2023-11-29 00:55:27,541 INFO L226 Difference]: Without dead ends: 62 [2023-11-29 00:55:27,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:55:27,542 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:27,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 108 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:55:27,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-29 00:55:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-29 00:55:27,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 61 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2023-11-29 00:55:27,548 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 52 [2023-11-29 00:55:27,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:27,548 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2023-11-29 00:55:27,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2023-11-29 00:55:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 00:55:27,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:27,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:27,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:55:27,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:27,751 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:27,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:27,751 INFO L85 PathProgramCache]: Analyzing trace with hash 948688438, now seen corresponding path program 1 times [2023-11-29 00:55:27,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:27,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567440034] [2023-11-29 00:55:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:27,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:55:28,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:28,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567440034] [2023-11-29 00:55:28,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567440034] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:28,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511095057] [2023-11-29 00:55:28,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:28,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:28,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:28,622 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:28,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:55:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:30,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 6156 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:55:30,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:55:30,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:55:30,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511095057] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:55:30,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:55:30,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-29 00:55:30,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037886420] [2023-11-29 00:55:30,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:55:30,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:55:30,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:30,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:55:30,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:55:30,127 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:30,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:30,853 INFO L93 Difference]: Finished difference Result 107 states and 146 transitions. [2023-11-29 00:55:30,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:55:30,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-29 00:55:30,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:30,855 INFO L225 Difference]: With dead ends: 107 [2023-11-29 00:55:30,855 INFO L226 Difference]: Without dead ends: 72 [2023-11-29 00:55:30,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:55:30,856 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 13 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:30,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 273 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:55:30,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-29 00:55:30,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-29 00:55:30,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 71 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2023-11-29 00:55:30,863 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 55 [2023-11-29 00:55:30,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:30,863 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2023-11-29 00:55:30,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:30,864 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2023-11-29 00:55:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 00:55:30,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:30,865 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:30,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:55:31,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:31,066 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:31,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:31,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1849547982, now seen corresponding path program 2 times [2023-11-29 00:55:31,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:31,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655991443] [2023-11-29 00:55:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:31,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 00:55:31,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:31,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655991443] [2023-11-29 00:55:31,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655991443] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:31,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692690774] [2023-11-29 00:55:31,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:55:31,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:31,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:31,977 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:31,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:55:33,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:55:33,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:55:33,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 6221 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:55:33,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:55:33,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 00:55:33,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692690774] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:33,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:55:33,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 8] total 12 [2023-11-29 00:55:33,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621651512] [2023-11-29 00:55:33,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:33,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:55:33,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:33,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:55:33,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:55:33,648 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:34,157 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2023-11-29 00:55:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:55:34,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-29 00:55:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:34,158 INFO L225 Difference]: With dead ends: 82 [2023-11-29 00:55:34,158 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 00:55:34,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:55:34,159 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:34,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 160 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:55:34,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 00:55:34,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-29 00:55:34,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 72 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:34,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2023-11-29 00:55:34,166 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 65 [2023-11-29 00:55:34,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:34,166 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2023-11-29 00:55:34,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2023-11-29 00:55:34,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 00:55:34,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:34,168 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:34,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:55:34,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:55:34,368 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:34,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:34,369 INFO L85 PathProgramCache]: Analyzing trace with hash 938461958, now seen corresponding path program 1 times [2023-11-29 00:55:34,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:34,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116180857] [2023-11-29 00:55:34,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:34,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 00:55:35,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:35,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116180857] [2023-11-29 00:55:35,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116180857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:35,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675780007] [2023-11-29 00:55:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:35,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:35,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:35,333 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:35,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:55:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:36,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 6235 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:55:36,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 00:55:36,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-29 00:55:36,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675780007] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:55:36,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:55:36,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 11 [2023-11-29 00:55:36,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546194348] [2023-11-29 00:55:36,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:55:36,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 00:55:36,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:36,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 00:55:36,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:55:36,929 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:37,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:37,852 INFO L93 Difference]: Finished difference Result 128 states and 173 transitions. [2023-11-29 00:55:37,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:55:37,853 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-11-29 00:55:37,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:37,854 INFO L225 Difference]: With dead ends: 128 [2023-11-29 00:55:37,854 INFO L226 Difference]: Without dead ends: 83 [2023-11-29 00:55:37,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:55:37,854 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 19 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:37,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 374 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:55:37,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-29 00:55:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-29 00:55:37,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.329268292682927) internal successors, (109), 82 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2023-11-29 00:55:37,862 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 68 [2023-11-29 00:55:37,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:37,862 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2023-11-29 00:55:37,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2023-11-29 00:55:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-29 00:55:37,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:37,863 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:37,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 00:55:38,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:55:38,064 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:38,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:38,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1365987656, now seen corresponding path program 2 times [2023-11-29 00:55:38,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:38,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367371266] [2023-11-29 00:55:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:38,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 00:55:39,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:39,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367371266] [2023-11-29 00:55:39,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367371266] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:39,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857661914] [2023-11-29 00:55:39,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:55:39,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:39,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:39,038 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:39,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:55:40,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:55:40,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:55:40,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 6300 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 00:55:40,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 00:55:40,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 00:55:40,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857661914] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:55:40,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:55:40,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 5] total 14 [2023-11-29 00:55:40,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757904748] [2023-11-29 00:55:40,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:55:40,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:55:40,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:40,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:55:40,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:55:40,698 INFO L87 Difference]: Start difference. First operand 83 states and 109 transitions. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:42,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:42,060 INFO L93 Difference]: Finished difference Result 146 states and 196 transitions. [2023-11-29 00:55:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:55:42,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2023-11-29 00:55:42,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:42,061 INFO L225 Difference]: With dead ends: 146 [2023-11-29 00:55:42,061 INFO L226 Difference]: Without dead ends: 92 [2023-11-29 00:55:42,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:55:42,062 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 27 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:42,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 552 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 00:55:42,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-29 00:55:42,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2023-11-29 00:55:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 89 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:42,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 118 transitions. [2023-11-29 00:55:42,068 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 118 transitions. Word has length 78 [2023-11-29 00:55:42,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:42,068 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 118 transitions. [2023-11-29 00:55:42,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 118 transitions. [2023-11-29 00:55:42,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-29 00:55:42,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:42,069 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:42,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:55:42,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:55:42,270 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:42,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:42,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1427743436, now seen corresponding path program 3 times [2023-11-29 00:55:42,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:42,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614461196] [2023-11-29 00:55:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:42,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-29 00:55:43,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:43,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614461196] [2023-11-29 00:55:43,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614461196] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:43,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308337498] [2023-11-29 00:55:43,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:55:43,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:43,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:43,290 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:43,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:55:44,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:55:44,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:55:44,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 6167 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:55:44,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-29 00:55:44,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-29 00:55:44,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308337498] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:44,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:55:44,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 12 [2023-11-29 00:55:44,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655130874] [2023-11-29 00:55:44,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:44,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:55:44,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:44,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:55:44,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:55:44,932 INFO L87 Difference]: Start difference. First operand 90 states and 118 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:45,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:45,517 INFO L93 Difference]: Finished difference Result 125 states and 165 transitions. [2023-11-29 00:55:45,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:55:45,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-11-29 00:55:45,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:45,518 INFO L225 Difference]: With dead ends: 125 [2023-11-29 00:55:45,518 INFO L226 Difference]: Without dead ends: 91 [2023-11-29 00:55:45,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:55:45,520 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 11 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:45,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 108 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:55:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-29 00:55:45,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-11-29 00:55:45,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.3222222222222222) internal successors, (119), 90 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:45,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2023-11-29 00:55:45,528 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 85 [2023-11-29 00:55:45,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:45,528 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2023-11-29 00:55:45,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:45,528 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2023-11-29 00:55:45,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-29 00:55:45,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:45,529 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:45,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:55:45,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:55:45,730 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:45,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:45,730 INFO L85 PathProgramCache]: Analyzing trace with hash 642434296, now seen corresponding path program 1 times [2023-11-29 00:55:45,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:45,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599204767] [2023-11-29 00:55:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:45,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 00:55:46,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:46,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599204767] [2023-11-29 00:55:46,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599204767] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:46,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259066767] [2023-11-29 00:55:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:46,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:46,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:46,905 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:46,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:55:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:48,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 6357 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 00:55:48,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-29 00:55:48,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 00:55:48,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259066767] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:55:48,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:55:48,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 22 [2023-11-29 00:55:48,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071686040] [2023-11-29 00:55:48,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:55:48,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 00:55:48,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:48,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 00:55:48,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-11-29 00:55:48,684 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 22 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:50,925 INFO L93 Difference]: Finished difference Result 173 states and 235 transitions. [2023-11-29 00:55:50,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:55:50,925 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 22 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2023-11-29 00:55:50,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:50,926 INFO L225 Difference]: With dead ends: 173 [2023-11-29 00:55:50,926 INFO L226 Difference]: Without dead ends: 112 [2023-11-29 00:55:50,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:55:50,927 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 54 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:50,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 832 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 00:55:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-29 00:55:50,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2023-11-29 00:55:50,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.3211009174311927) internal successors, (144), 109 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 144 transitions. [2023-11-29 00:55:50,935 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 144 transitions. Word has length 88 [2023-11-29 00:55:50,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:50,936 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 144 transitions. [2023-11-29 00:55:50,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 22 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:50,936 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 144 transitions. [2023-11-29 00:55:50,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-29 00:55:50,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:50,937 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:50,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:55:51,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:55:51,137 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:51,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:51,138 INFO L85 PathProgramCache]: Analyzing trace with hash -645110381, now seen corresponding path program 2 times [2023-11-29 00:55:51,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:51,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920476994] [2023-11-29 00:55:51,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:51,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-11-29 00:55:52,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:52,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920476994] [2023-11-29 00:55:52,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920476994] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:52,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394808640] [2023-11-29 00:55:52,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:55:52,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:52,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:52,327 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:52,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:55:54,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:55:54,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:55:54,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 6476 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 00:55:54,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2023-11-29 00:55:54,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 80 proven. 70 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 00:55:54,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394808640] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:55:54,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:55:54,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 14] total 26 [2023-11-29 00:55:54,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602102236] [2023-11-29 00:55:54,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:55:54,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 00:55:54,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:54,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 00:55:54,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:55:54,465 INFO L87 Difference]: Start difference. First operand 110 states and 144 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:57,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:57,591 INFO L93 Difference]: Finished difference Result 211 states and 286 transitions. [2023-11-29 00:55:57,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:55:57,591 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2023-11-29 00:55:57,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:57,592 INFO L225 Difference]: With dead ends: 211 [2023-11-29 00:55:57,592 INFO L226 Difference]: Without dead ends: 132 [2023-11-29 00:55:57,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2023-11-29 00:55:57,593 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 61 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:57,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1098 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 00:55:57,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-29 00:55:57,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-29 00:55:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.3206106870229009) internal successors, (173), 131 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 173 transitions. [2023-11-29 00:55:57,599 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 173 transitions. Word has length 107 [2023-11-29 00:55:57,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:57,600 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 173 transitions. [2023-11-29 00:55:57,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:57,600 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 173 transitions. [2023-11-29 00:55:57,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-29 00:55:57,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:57,601 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:57,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 00:55:57,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:55:57,802 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:57,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:57,802 INFO L85 PathProgramCache]: Analyzing trace with hash -461797041, now seen corresponding path program 3 times [2023-11-29 00:55:57,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:57,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793110602] [2023-11-29 00:55:57,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:57,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-11-29 00:55:59,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:59,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793110602] [2023-11-29 00:55:59,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793110602] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:59,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544913172] [2023-11-29 00:55:59,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:55:59,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:59,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:59,094 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:59,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:56:01,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:56:01,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:56:01,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 6167 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 00:56:01,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:56:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-29 00:56:01,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:56:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2023-11-29 00:56:01,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544913172] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:56:01,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:56:01,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 5] total 13 [2023-11-29 00:56:01,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740918150] [2023-11-29 00:56:01,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:56:01,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:56:01,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:56:01,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:56:01,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:56:01,536 INFO L87 Difference]: Start difference. First operand 132 states and 173 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:01,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:56:01,961 INFO L93 Difference]: Finished difference Result 231 states and 306 transitions. [2023-11-29 00:56:01,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:56:01,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2023-11-29 00:56:01,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:56:01,963 INFO L225 Difference]: With dead ends: 231 [2023-11-29 00:56:01,963 INFO L226 Difference]: Without dead ends: 133 [2023-11-29 00:56:01,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:56:01,964 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 11 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:56:01,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 108 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:56:01,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-29 00:56:01,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2023-11-29 00:56:01,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.3181818181818181) internal successors, (174), 132 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 174 transitions. [2023-11-29 00:56:01,973 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 174 transitions. Word has length 129 [2023-11-29 00:56:01,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:56:01,973 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 174 transitions. [2023-11-29 00:56:01,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 174 transitions. [2023-11-29 00:56:01,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-29 00:56:01,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:56:01,975 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:56:01,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 00:56:02,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:56:02,176 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:56:02,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:56:02,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1904446591, now seen corresponding path program 1 times [2023-11-29 00:56:02,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:56:02,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757371141] [2023-11-29 00:56:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:02,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:56:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:56:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2023-11-29 00:56:03,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:56:03,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757371141] [2023-11-29 00:56:03,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757371141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:56:03,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372721142] [2023-11-29 00:56:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:03,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:03,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:56:03,386 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:56:03,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:56:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:56:04,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 6627 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 00:56:04,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:56:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 00:56:05,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:56:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2023-11-29 00:56:05,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372721142] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:56:05,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:56:05,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 24, 13] total 42 [2023-11-29 00:56:05,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40319471] [2023-11-29 00:56:05,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:56:05,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 00:56:05,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:56:05,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 00:56:05,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 00:56:05,791 INFO L87 Difference]: Start difference. First operand 133 states and 174 transitions. Second operand has 42 states, 42 states have (on average 4.5) internal successors, (189), 42 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:15,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:56:15,937 INFO L93 Difference]: Finished difference Result 271 states and 370 transitions. [2023-11-29 00:56:15,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 00:56:15,938 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.5) internal successors, (189), 42 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-11-29 00:56:15,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:56:15,939 INFO L225 Difference]: With dead ends: 271 [2023-11-29 00:56:15,939 INFO L226 Difference]: Without dead ends: 170 [2023-11-29 00:56:15,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=448, Invalid=2204, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 00:56:15,941 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 178 mSDsluCounter, 2191 mSDsCounter, 0 mSdLazyCounter, 2739 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 2264 SdHoareTripleChecker+Invalid, 2741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:56:15,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 2264 Invalid, 2741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2739 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-29 00:56:15,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-29 00:56:15,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-11-29 00:56:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.319526627218935) internal successors, (223), 169 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 223 transitions. [2023-11-29 00:56:15,950 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 223 transitions. Word has length 132 [2023-11-29 00:56:15,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:56:15,950 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 223 transitions. [2023-11-29 00:56:15,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.5) internal successors, (189), 42 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:15,950 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 223 transitions. [2023-11-29 00:56:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-29 00:56:15,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:56:15,951 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 12, 12, 12, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:56:15,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 00:56:16,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:56:16,151 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:56:16,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:56:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash 81179708, now seen corresponding path program 2 times [2023-11-29 00:56:16,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:56:16,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382618979] [2023-11-29 00:56:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:16,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:56:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:56:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2023-11-29 00:56:17,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:56:17,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382618979] [2023-11-29 00:56:17,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382618979] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:56:17,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655595959] [2023-11-29 00:56:17,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:56:17,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:17,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:56:17,784 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:56:17,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:56:19,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:56:19,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:56:19,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 6854 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 00:56:19,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:56:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2023-11-29 00:56:19,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:56:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 370 proven. 420 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2023-11-29 00:56:20,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655595959] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:56:20,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:56:20,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 28] total 49 [2023-11-29 00:56:20,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809443825] [2023-11-29 00:56:20,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:56:20,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 00:56:20,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:56:20,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 00:56:20,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=2081, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 00:56:20,919 INFO L87 Difference]: Start difference. First operand 170 states and 223 transitions. Second operand has 49 states, 49 states have (on average 3.979591836734694) internal successors, (195), 49 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:38,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:56:38,971 INFO L93 Difference]: Finished difference Result 350 states and 477 transitions. [2023-11-29 00:56:38,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 00:56:38,972 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.979591836734694) internal successors, (195), 49 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2023-11-29 00:56:38,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:56:38,973 INFO L225 Difference]: With dead ends: 350 [2023-11-29 00:56:38,973 INFO L226 Difference]: Without dead ends: 213 [2023-11-29 00:56:38,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=607, Invalid=3053, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 00:56:38,975 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 222 mSDsluCounter, 2315 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 2382 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:56:38,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 2382 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-11-29 00:56:38,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-29 00:56:38,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2023-11-29 00:56:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.320754716981132) internal successors, (280), 212 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 280 transitions. [2023-11-29 00:56:38,984 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 280 transitions. Word has length 169 [2023-11-29 00:56:38,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:56:38,984 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 280 transitions. [2023-11-29 00:56:38,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.979591836734694) internal successors, (195), 49 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 280 transitions. [2023-11-29 00:56:38,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-11-29 00:56:38,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:56:38,985 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 22, 22, 22, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:56:39,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:56:39,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:56:39,186 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:56:39,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:56:39,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2072713407, now seen corresponding path program 3 times [2023-11-29 00:56:39,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:56:39,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804633042] [2023-11-29 00:56:39,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:39,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:56:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:56:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1762 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2023-11-29 00:56:42,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:56:42,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804633042] [2023-11-29 00:56:42,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804633042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:56:42,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859984303] [2023-11-29 00:56:42,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:56:42,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:42,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:56:42,796 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:56:42,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:56:45,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:56:45,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:56:46,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 6267 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:56:46,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:56:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1762 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1750 trivial. 0 not checked. [2023-11-29 00:56:46,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:56:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1762 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2023-11-29 00:56:46,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859984303] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:56:46,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:56:46,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [29, 6] total 35 [2023-11-29 00:56:46,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338424376] [2023-11-29 00:56:46,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:56:46,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:56:46,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:56:46,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:56:46,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:56:46,254 INFO L87 Difference]: Start difference. First operand 213 states and 280 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:46,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:56:46,772 INFO L93 Difference]: Finished difference Result 303 states and 400 transitions. [2023-11-29 00:56:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:56:46,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2023-11-29 00:56:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:56:46,774 INFO L225 Difference]: With dead ends: 303 [2023-11-29 00:56:46,774 INFO L226 Difference]: Without dead ends: 214 [2023-11-29 00:56:46,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:56:46,775 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 7 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:56:46,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 163 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:56:46,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-29 00:56:46,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2023-11-29 00:56:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.3192488262910798) internal successors, (281), 213 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:46,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 281 transitions. [2023-11-29 00:56:46,790 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 281 transitions. Word has length 212 [2023-11-29 00:56:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:56:46,790 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 281 transitions. [2023-11-29 00:56:46,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:46,790 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 281 transitions. [2023-11-29 00:56:46,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-11-29 00:56:46,792 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:56:46,792 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 22, 22, 22, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:56:46,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:56:46,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:46,992 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:56:46,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:56:46,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1680534967, now seen corresponding path program 1 times [2023-11-29 00:56:46,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:56:46,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438761296] [2023-11-29 00:56:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:46,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:56:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:56:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1763 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 762 trivial. 0 not checked. [2023-11-29 00:56:50,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:56:50,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438761296] [2023-11-29 00:56:50,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438761296] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:56:50,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800964129] [2023-11-29 00:56:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:50,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:50,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:56:50,475 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:56:50,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:56:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:56:52,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 7122 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 00:56:52,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:56:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1763 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 1725 trivial. 0 not checked. [2023-11-29 00:56:52,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:56:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1763 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1761 trivial. 0 not checked. [2023-11-29 00:56:52,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800964129] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:56:52,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:56:52,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [29, 13] total 42 [2023-11-29 00:56:52,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006177556] [2023-11-29 00:56:52,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:56:52,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:56:52,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:56:52,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:56:52,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1610, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 00:56:52,561 INFO L87 Difference]: Start difference. First operand 214 states and 281 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:56:53,008 INFO L93 Difference]: Finished difference Result 393 states and 520 transitions. [2023-11-29 00:56:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:56:53,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2023-11-29 00:56:53,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:56:53,009 INFO L225 Difference]: With dead ends: 393 [2023-11-29 00:56:53,010 INFO L226 Difference]: Without dead ends: 215 [2023-11-29 00:56:53,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=1610, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 00:56:53,011 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:56:53,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 111 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:56:53,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-29 00:56:53,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2023-11-29 00:56:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.3177570093457944) internal successors, (282), 214 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 282 transitions. [2023-11-29 00:56:53,023 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 282 transitions. Word has length 213 [2023-11-29 00:56:53,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:56:53,023 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 282 transitions. [2023-11-29 00:56:53,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:53,023 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 282 transitions. [2023-11-29 00:56:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-11-29 00:56:53,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:56:53,025 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 22, 22, 22, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:56:53,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:56:53,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:53,225 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:56:53,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:56:53,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1869442415, now seen corresponding path program 1 times [2023-11-29 00:56:53,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:56:53,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233515507] [2023-11-29 00:56:53,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:53,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:56:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:56:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2023-11-29 00:56:56,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:56:56,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233515507] [2023-11-29 00:56:56,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233515507] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:56:56,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963218328] [2023-11-29 00:56:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:56,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:56,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:56:56,731 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:56:56,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:56:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:56:58,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 7127 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-29 00:56:58,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:56:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1698 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 00:56:59,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:57:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1049 trivial. 0 not checked. [2023-11-29 00:57:00,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963218328] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:57:00,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:57:00,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 48, 25] total 75 [2023-11-29 00:57:00,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606348214] [2023-11-29 00:57:00,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:57:00,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-11-29 00:57:00,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:57:00,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-11-29 00:57:00,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=4848, Unknown=0, NotChecked=0, Total=5550 [2023-11-29 00:57:00,763 INFO L87 Difference]: Start difference. First operand 215 states and 282 transitions. Second operand has 75 states, 75 states have (on average 3.8933333333333335) internal successors, (292), 75 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:59:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:59:41,386 INFO L93 Difference]: Finished difference Result 384 states and 531 transitions. [2023-11-29 00:59:41,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-29 00:59:41,387 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.8933333333333335) internal successors, (292), 75 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2023-11-29 00:59:41,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:59:41,388 INFO L225 Difference]: With dead ends: 384 [2023-11-29 00:59:41,388 INFO L226 Difference]: Without dead ends: 292 [2023-11-29 00:59:41,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 153.4s TimeCoverageRelationStatistics Valid=1758, Invalid=7554, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 00:59:41,391 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 591 mSDsluCounter, 4983 mSDsCounter, 0 mSdLazyCounter, 8380 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 5083 SdHoareTripleChecker+Invalid, 8382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:59:41,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 5083 Invalid, 8382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8380 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2023-11-29 00:59:41,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-11-29 00:59:41,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 290. [2023-11-29 00:59:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.3217993079584776) internal successors, (382), 289 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:59:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 382 transitions. [2023-11-29 00:59:41,405 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 382 transitions. Word has length 214 [2023-11-29 00:59:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:59:41,405 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 382 transitions. [2023-11-29 00:59:41,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.8933333333333335) internal successors, (292), 75 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:59:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 382 transitions. [2023-11-29 00:59:41,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2023-11-29 00:59:41,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:59:41,408 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 27, 27, 27, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:59:41,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:59:41,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 00:59:41,608 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:59:41,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:59:41,609 INFO L85 PathProgramCache]: Analyzing trace with hash 293783672, now seen corresponding path program 2 times [2023-11-29 00:59:41,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:59:41,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285618759] [2023-11-29 00:59:41,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:59:41,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:59:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:59:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4279 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 3199 trivial. 0 not checked. [2023-11-29 00:59:45,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:59:45,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285618759] [2023-11-29 00:59:45,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285618759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:59:45,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719549346] [2023-11-29 00:59:45,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:59:45,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:59:45,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:59:45,529 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:59:45,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:59:47,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:59:47,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:59:47,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 7577 conjuncts, 114 conjunts are in the unsatisfiable core [2023-11-29 00:59:47,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:59:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4279 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 3199 trivial. 0 not checked. [2023-11-29 00:59:47,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:59:51,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4279 backedges. 1558 proven. 2160 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-11-29 00:59:51,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719549346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:59:51,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:59:51,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 58] total 87 [2023-11-29 00:59:51,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375584721] [2023-11-29 00:59:51,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:59:51,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2023-11-29 00:59:51,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:59:51,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2023-11-29 00:59:51,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=6471, Unknown=0, NotChecked=0, Total=7482 [2023-11-29 00:59:51,577 INFO L87 Difference]: Start difference. First operand 290 states and 382 transitions. Second operand has 87 states, 87 states have (on average 3.586206896551724) internal successors, (312), 87 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:06:11,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:06:11,069 INFO L93 Difference]: Finished difference Result 541 states and 744 transitions. [2023-11-29 01:06:11,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-29 01:06:11,070 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.586206896551724) internal successors, (312), 87 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 289 [2023-11-29 01:06:11,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:06:11,072 INFO L225 Difference]: With dead ends: 541 [2023-11-29 01:06:11,072 INFO L226 Difference]: Without dead ends: 377 [2023-11-29 01:06:11,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 374.1s TimeCoverageRelationStatistics Valid=2599, Invalid=10278, Unknown=5, NotChecked=0, Total=12882 [2023-11-29 01:06:11,077 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 549 mSDsluCounter, 4484 mSDsCounter, 0 mSdLazyCounter, 5911 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 4566 SdHoareTripleChecker+Invalid, 5914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:06:11,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 4566 Invalid, 5914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5911 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2023-11-29 01:06:11,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-11-29 01:06:11,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2023-11-29 01:06:11,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.324468085106383) internal successors, (498), 376 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:06:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 498 transitions. [2023-11-29 01:06:11,092 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 498 transitions. Word has length 289 [2023-11-29 01:06:11,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:06:11,093 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 498 transitions. [2023-11-29 01:06:11,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.586206896551724) internal successors, (312), 87 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:06:11,093 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 498 transitions. [2023-11-29 01:06:11,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2023-11-29 01:06:11,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:06:11,094 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 46, 46, 46, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:06:11,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-29 01:06:11,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:06:11,295 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:06:11,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:06:11,295 INFO L85 PathProgramCache]: Analyzing trace with hash 265422961, now seen corresponding path program 3 times [2023-11-29 01:06:11,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:06:11,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137620994] [2023-11-29 01:06:11,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:06:11,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:06:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:06:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 3199 trivial. 0 not checked. [2023-11-29 01:06:19,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:06:19,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137620994] [2023-11-29 01:06:19,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137620994] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:06:19,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240339524] [2023-11-29 01:06:19,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:06:19,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:06:19,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:06:19,590 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:06:19,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:06:24,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 01:06:24,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:06:24,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 6267 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:06:24,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:06:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 7858 trivial. 0 not checked. [2023-11-29 01:06:24,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:06:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7873 trivial. 0 not checked. [2023-11-29 01:06:24,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240339524] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:06:24,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:06:24,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 7, 5] total 67 [2023-11-29 01:06:24,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779019595] [2023-11-29 01:06:24,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:06:24,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-11-29 01:06:24,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:06:24,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-11-29 01:06:24,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=4226, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 01:06:24,571 INFO L87 Difference]: Start difference. First operand 377 states and 498 transitions. Second operand has 67 states, 67 states have (on average 3.8059701492537314) internal successors, (255), 67 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:06:33,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:06:33,603 INFO L93 Difference]: Finished difference Result 735 states and 978 transitions. [2023-11-29 01:06:33,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 01:06:33,604 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.8059701492537314) internal successors, (255), 67 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 376 [2023-11-29 01:06:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:06:33,606 INFO L225 Difference]: With dead ends: 735 [2023-11-29 01:06:33,606 INFO L226 Difference]: Without dead ends: 394 [2023-11-29 01:06:33,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 744 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=212, Invalid=4480, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 01:06:33,608 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 114 mSDsluCounter, 6007 mSDsCounter, 0 mSdLazyCounter, 11548 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6116 SdHoareTripleChecker+Invalid, 11550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:06:33,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 6116 Invalid, 11550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11548 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2023-11-29 01:06:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2023-11-29 01:06:33,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 392. [2023-11-29 01:06:33,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.3222506393861893) internal successors, (517), 391 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:06:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 517 transitions. [2023-11-29 01:06:33,623 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 517 transitions. Word has length 376 [2023-11-29 01:06:33,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:06:33,624 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 517 transitions. [2023-11-29 01:06:33,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.8059701492537314) internal successors, (255), 67 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:06:33,624 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 517 transitions. [2023-11-29 01:06:33,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2023-11-29 01:06:33,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:06:33,626 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 46, 46, 46, 8, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:06:33,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:06:33,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:06:33,826 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:06:33,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:06:33,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1467338976, now seen corresponding path program 4 times [2023-11-29 01:06:33,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:06:33,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645692172] [2023-11-29 01:06:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:06:33,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:06:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:06:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8086 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 3241 trivial. 0 not checked. [2023-11-29 01:06:42,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:06:42,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645692172] [2023-11-29 01:06:42,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645692172] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:06:42,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405912192] [2023-11-29 01:06:42,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:06:42,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:06:42,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:06:42,891 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:06:42,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:06:44,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:06:44,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:06:44,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 8174 conjuncts, 190 conjunts are in the unsatisfiable core [2023-11-29 01:06:44,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:06:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8086 backedges. 0 proven. 7831 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-11-29 01:06:47,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:06:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8086 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 4935 trivial. 0 not checked. [2023-11-29 01:06:53,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405912192] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:06:53,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:06:53,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 96, 49] total 154 [2023-11-29 01:06:53,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268472270] [2023-11-29 01:06:53,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:06:53,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2023-11-29 01:06:53,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:06:53,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2023-11-29 01:06:53,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2136, Invalid=21426, Unknown=0, NotChecked=0, Total=23562 [2023-11-29 01:06:53,267 INFO L87 Difference]: Start difference. First operand 392 states and 517 transitions. Second operand has 154 states, 154 states have (on average 3.435064935064935) internal successors, (529), 154 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:08:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:08:44,950 INFO L93 Difference]: Finished difference Result 615 states and 832 transitions. [2023-11-29 01:08:44,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-11-29 01:08:44,950 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 3.435064935064935) internal successors, (529), 154 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 391 [2023-11-29 01:08:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:08:44,953 INFO L225 Difference]: With dead ends: 615 [2023-11-29 01:08:44,953 INFO L226 Difference]: Without dead ends: 451 [2023-11-29 01:08:44,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 688 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 99.8s TimeCoverageRelationStatistics Valid=3192, Invalid=25538, Unknown=0, NotChecked=0, Total=28730 [2023-11-29 01:08:44,955 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 1323 mSDsluCounter, 14084 mSDsCounter, 0 mSdLazyCounter, 30834 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 14239 SdHoareTripleChecker+Invalid, 30835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:08:44,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1323 Valid, 14239 Invalid, 30835 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 30834 Invalid, 0 Unknown, 0 Unchecked, 20.8s Time] [2023-11-29 01:08:44,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2023-11-29 01:08:44,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 449. [2023-11-29 01:08:44,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.3236607142857142) internal successors, (593), 448 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:08:44,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 593 transitions. [2023-11-29 01:08:44,973 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 593 transitions. Word has length 391 [2023-11-29 01:08:44,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:08:44,973 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 593 transitions. [2023-11-29 01:08:44,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 3.435064935064935) internal successors, (529), 154 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:08:44,974 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 593 transitions. [2023-11-29 01:08:44,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-11-29 01:08:44,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:08:44,976 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 58, 58, 58, 8, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:08:44,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 01:08:45,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 01:08:45,176 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:08:45,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:08:45,177 INFO L85 PathProgramCache]: Analyzing trace with hash -607871255, now seen corresponding path program 5 times [2023-11-29 01:08:45,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:08:45,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271264847] [2023-11-29 01:08:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:08:45,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:08:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:08:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11219 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 6202 trivial. 0 not checked. [2023-11-29 01:08:55,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:08:55,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271264847] [2023-11-29 01:08:55,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271264847] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:08:55,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228440748] [2023-11-29 01:08:55,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:08:55,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:08:55,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:08:55,028 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:08:55,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1b97777-8896-43ac-9776-c39a6d694f5a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process