./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/gcas_0_safe.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_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/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_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/neural-networks/gcas_0_safe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/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_44009ade-e0fe-46da-b88f-281472750bf4/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 2d98fc4ca807af5908de97e445bcf1cf4ed3fa5a40bc71c3c761f5c2e88ed9a5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:41:44,129 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:41:44,201 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 03:41:44,206 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:41:44,207 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:41:44,233 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:41:44,233 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:41:44,234 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:41:44,234 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:41:44,235 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:41:44,236 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:41:44,236 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:41:44,237 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:41:44,238 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:41:44,238 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:41:44,239 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:41:44,240 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:41:44,240 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:41:44,241 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:41:44,241 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:41:44,242 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:41:44,243 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:41:44,243 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:41:44,244 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:41:44,244 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:41:44,245 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:41:44,245 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:41:44,246 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:41:44,246 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:41:44,247 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:41:44,248 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:41:44,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:41:44,248 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:41:44,249 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:41:44,249 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:41:44,249 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:41:44,249 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:41:44,250 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:41:44,250 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:41:44,250 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:41:44,250 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:41:44,251 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:41:44,251 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_44009ade-e0fe-46da-b88f-281472750bf4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d98fc4ca807af5908de97e445bcf1cf4ed3fa5a40bc71c3c761f5c2e88ed9a5 [2023-11-29 03:41:44,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:41:44,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:41:44,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:41:44,528 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:41:44,529 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:41:44,530 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/neural-networks/gcas_0_safe.c-amalgamation.i [2023-11-29 03:41:47,909 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:41:48,349 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:41:48,350 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/sv-benchmarks/c/neural-networks/gcas_0_safe.c-amalgamation.i [2023-11-29 03:41:48,379 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/data/0f8124d2d/ec0dd3ca971c447ab68f159a5ec831c2/FLAG268c1fcb5 [2023-11-29 03:41:48,394 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/data/0f8124d2d/ec0dd3ca971c447ab68f159a5ec831c2 [2023-11-29 03:41:48,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:41:48,399 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:41:48,401 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:41:48,401 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:41:48,406 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:41:48,407 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:41:48" (1/1) ... [2023-11-29 03:41:48,407 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bc200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:48, skipping insertion in model container [2023-11-29 03:41:48,408 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:41:48" (1/1) ... [2023-11-29 03:41:48,486 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:41:49,293 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_44009ade-e0fe-46da-b88f-281472750bf4/sv-benchmarks/c/neural-networks/gcas_0_safe.c-amalgamation.i[65237,65250] [2023-11-29 03:41:49,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:41:49,577 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:41:49,644 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_44009ade-e0fe-46da-b88f-281472750bf4/sv-benchmarks/c/neural-networks/gcas_0_safe.c-amalgamation.i[65237,65250] [2023-11-29 03:41:49,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:41:50,100 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:41:50,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:50 WrapperNode [2023-11-29 03:41:50,100 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:41:50,101 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:41:50,102 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:41:50,102 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:41:50,109 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:50" (1/1) ... [2023-11-29 03:41:50,186 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:50" (1/1) ... [2023-11-29 03:41:50,326 INFO L138 Inliner]: procedures = 619, calls = 2157, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 2547 [2023-11-29 03:41:50,326 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:41:50,327 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:41:50,327 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:41:50,328 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:41:50,340 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:50" (1/1) ... [2023-11-29 03:41:50,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:50" (1/1) ... [2023-11-29 03:41:50,364 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:50" (1/1) ... [2023-11-29 03:41:50,421 INFO L175 MemorySlicer]: Split 2133 memory accesses to 12 slices as follows [2, 7, 449, 33, 1025, 43, 33, 449, 15, 38, 36, 3]. 48 percent of accesses are in the largest equivalence class. The 2071 initializations are split as follows [2, 7, 448, 32, 1024, 0, 32, 448, 14, 32, 32, 0]. The 19 writes are split as follows [0, 0, 0, 0, 0, 14, 0, 0, 0, 2, 2, 1]. [2023-11-29 03:41:50,422 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:50" (1/1) ... [2023-11-29 03:41:50,422 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:50" (1/1) ... [2023-11-29 03:41:50,479 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:50" (1/1) ... [2023-11-29 03:41:50,490 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:50" (1/1) ... [2023-11-29 03:41:50,502 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:50" (1/1) ... [2023-11-29 03:41:50,514 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:50" (1/1) ... [2023-11-29 03:41:50,530 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:41:50,531 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:41:50,531 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:41:50,531 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:41:50,532 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:50" (1/1) ... [2023-11-29 03:41:50,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:41:50,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:41:50,563 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:41:50,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:41:50,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2023-11-29 03:41:50,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2023-11-29 03:41:50,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2023-11-29 03:41:50,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#3 [2023-11-29 03:41:50,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#4 [2023-11-29 03:41:50,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#5 [2023-11-29 03:41:50,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#6 [2023-11-29 03:41:50,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#7 [2023-11-29 03:41:50,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#8 [2023-11-29 03:41:50,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#9 [2023-11-29 03:41:50,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#10 [2023-11-29 03:41:50,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#11 [2023-11-29 03:41:50,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 03:41:50,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#0 [2023-11-29 03:41:50,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#1 [2023-11-29 03:41:50,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#2 [2023-11-29 03:41:50,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#3 [2023-11-29 03:41:50,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#4 [2023-11-29 03:41:50,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#5 [2023-11-29 03:41:50,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#6 [2023-11-29 03:41:50,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#7 [2023-11-29 03:41:50,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#8 [2023-11-29 03:41:50,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#9 [2023-11-29 03:41:50,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#10 [2023-11-29 03:41:50,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#11 [2023-11-29 03:41:50,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#0 [2023-11-29 03:41:50,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#1 [2023-11-29 03:41:50,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#2 [2023-11-29 03:41:50,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#3 [2023-11-29 03:41:50,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#4 [2023-11-29 03:41:50,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#5 [2023-11-29 03:41:50,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#6 [2023-11-29 03:41:50,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#7 [2023-11-29 03:41:50,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#8 [2023-11-29 03:41:50,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#9 [2023-11-29 03:41:50,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#10 [2023-11-29 03:41:50,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#11 [2023-11-29 03:41:50,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:41:50,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:41:50,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:41:50,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 03:41:50,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:41:50,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 03:41:50,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 03:41:50,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 03:41:50,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 03:41:50,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 03:41:50,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-29 03:41:50,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-29 03:41:50,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-29 03:41:50,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-29 03:41:50,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-29 03:41:50,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-29 03:41:50,863 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:41:50,865 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:41:53,632 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:41:53,847 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:41:53,847 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-29 03:41:53,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:41:53 BoogieIcfgContainer [2023-11-29 03:41:53,848 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:41:53,851 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:41:53,851 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:41:53,855 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:41:53,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:41:48" (1/3) ... [2023-11-29 03:41:53,856 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393cadde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:41:53, skipping insertion in model container [2023-11-29 03:41:53,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:41:50" (2/3) ... [2023-11-29 03:41:53,857 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393cadde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:41:53, skipping insertion in model container [2023-11-29 03:41:53,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:41:53" (3/3) ... [2023-11-29 03:41:53,858 INFO L112 eAbstractionObserver]: Analyzing ICFG gcas_0_safe.c-amalgamation.i [2023-11-29 03:41:53,882 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:41:53,882 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:41:53,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:41:53,950 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;@1c4ba6e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:41:53,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 03:41:53,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 73 states have (on average 1.7534246575342465) internal successors, (128), 74 states have internal predecessors, (128), 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 03:41:53,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 03:41:53,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:41:53,963 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, 1] [2023-11-29 03:41:53,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:41:53,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:53,970 INFO L85 PathProgramCache]: Analyzing trace with hash -781333683, now seen corresponding path program 1 times [2023-11-29 03:41:53,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:53,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350103166] [2023-11-29 03:41:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:53,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:54,789 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 03:41:54,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:54,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350103166] [2023-11-29 03:41:54,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350103166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:41:54,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:41:54,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:41:54,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282954715] [2023-11-29 03:41:54,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:41:54,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 03:41:54,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:54,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 03:41:54,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:41:54,834 INFO L87 Difference]: Start difference. First operand has 75 states, 73 states have (on average 1.7534246575342465) internal successors, (128), 74 states have internal predecessors, (128), 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 28.0) internal successors, (56), 2 states have internal predecessors, (56), 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 03:41:55,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:41:55,187 INFO L93 Difference]: Finished difference Result 147 states and 251 transitions. [2023-11-29 03:41:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 03:41:55,191 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 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 56 [2023-11-29 03:41:55,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:41:55,201 INFO L225 Difference]: With dead ends: 147 [2023-11-29 03:41:55,201 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 03:41:55,205 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 03:41:55,209 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:41:55,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:41:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 03:41:55,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-29 03:41:55,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3888888888888888) internal successors, (100), 72 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 03:41:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 100 transitions. [2023-11-29 03:41:55,246 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 100 transitions. Word has length 56 [2023-11-29 03:41:55,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:41:55,246 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 100 transitions. [2023-11-29 03:41:55,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 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 03:41:55,247 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 100 transitions. [2023-11-29 03:41:55,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 03:41:55,249 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:41:55,249 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, 1] [2023-11-29 03:41:55,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 03:41:55,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:41:55,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:55,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2129147117, now seen corresponding path program 1 times [2023-11-29 03:41:55,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:55,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204610214] [2023-11-29 03:41:55,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:55,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:55,765 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 03:41:55,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:55,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204610214] [2023-11-29 03:41:55,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204610214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:41:55,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:41:55,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:41:55,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461371583] [2023-11-29 03:41:55,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:41:55,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:41:55,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:55,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:41:55,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:41:55,770 INFO L87 Difference]: Start difference. First operand 73 states and 100 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 03:41:56,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:41:56,346 INFO L93 Difference]: Finished difference Result 138 states and 189 transitions. [2023-11-29 03:41:56,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:41:56,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2023-11-29 03:41:56,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:41:56,349 INFO L225 Difference]: With dead ends: 138 [2023-11-29 03:41:56,349 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 03:41:56,350 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 03:41:56,352 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 0 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:41:56,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 162 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 03:41:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 03:41:56,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-29 03:41:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.375) internal successors, (99), 72 states have internal predecessors, (99), 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 03:41:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 99 transitions. [2023-11-29 03:41:56,364 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 99 transitions. Word has length 56 [2023-11-29 03:41:56,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:41:56,365 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 99 transitions. [2023-11-29 03:41:56,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 03:41:56,366 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 99 transitions. [2023-11-29 03:41:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 03:41:56,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:41:56,369 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, 1] [2023-11-29 03:41:56,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 03:41:56,370 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:41:56,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:56,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2113628399, now seen corresponding path program 1 times [2023-11-29 03:41:56,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:56,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679749367] [2023-11-29 03:41:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:56,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:56,876 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 03:41:56,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:56,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679749367] [2023-11-29 03:41:56,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679749367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:41:56,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:41:56,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:41:56,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247944144] [2023-11-29 03:41:56,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:41:56,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:41:56,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:56,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:41:56,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:41:56,881 INFO L87 Difference]: Start difference. First operand 73 states and 99 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 03:41:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:41:57,435 INFO L93 Difference]: Finished difference Result 105 states and 144 transitions. [2023-11-29 03:41:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:41:57,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2023-11-29 03:41:57,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:41:57,437 INFO L225 Difference]: With dead ends: 105 [2023-11-29 03:41:57,437 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 03:41:57,438 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 03:41:57,440 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:41:57,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 160 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 03:41:57,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 03:41:57,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-29 03:41:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 72 states have internal predecessors, (98), 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 03:41:57,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2023-11-29 03:41:57,450 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 56 [2023-11-29 03:41:57,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:41:57,451 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2023-11-29 03:41:57,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 03:41:57,451 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2023-11-29 03:41:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 03:41:57,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:41:57,453 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, 1] [2023-11-29 03:41:57,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 03:41:57,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:41:57,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1092560045, now seen corresponding path program 1 times [2023-11-29 03:41:57,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:57,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986091283] [2023-11-29 03:41:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:57,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:57,949 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 03:41:57,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:57,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986091283] [2023-11-29 03:41:57,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986091283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:41:57,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:41:57,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:41:57,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765202235] [2023-11-29 03:41:57,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:41:57,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:41:57,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:57,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:41:57,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:41:57,953 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 03:41:58,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:41:58,392 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2023-11-29 03:41:58,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:41:58,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2023-11-29 03:41:58,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:41:58,395 INFO L225 Difference]: With dead ends: 76 [2023-11-29 03:41:58,395 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 03:41:58,395 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 03:41:58,397 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:41:58,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 159 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:41:58,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 03:41:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-29 03:41:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 72 states have internal predecessors, (97), 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 03:41:58,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 97 transitions. [2023-11-29 03:41:58,407 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 97 transitions. Word has length 56 [2023-11-29 03:41:58,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:41:58,407 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 97 transitions. [2023-11-29 03:41:58,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 03:41:58,408 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 97 transitions. [2023-11-29 03:41:58,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 03:41:58,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:41:58,410 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, 1] [2023-11-29 03:41:58,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 03:41:58,410 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:41:58,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:58,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1092561967, now seen corresponding path program 1 times [2023-11-29 03:41:58,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:58,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113607617] [2023-11-29 03:41:58,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:58,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:59,090 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 03:41:59,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:59,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113607617] [2023-11-29 03:41:59,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113607617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:41:59,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:41:59,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:41:59,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583983322] [2023-11-29 03:41:59,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:41:59,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:41:59,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:59,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:41:59,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:41:59,094 INFO L87 Difference]: Start difference. First operand 73 states and 97 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 03:41:59,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:41:59,599 INFO L93 Difference]: Finished difference Result 97 states and 130 transitions. [2023-11-29 03:41:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:41:59,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2023-11-29 03:41:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:41:59,602 INFO L225 Difference]: With dead ends: 97 [2023-11-29 03:41:59,602 INFO L226 Difference]: Without dead ends: 76 [2023-11-29 03:41:59,603 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 03:41:59,604 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 3 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:41:59,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 155 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 03:41:59,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-29 03:41:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-11-29 03:41:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.3424657534246576) internal successors, (98), 73 states have internal predecessors, (98), 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 03:41:59,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 98 transitions. [2023-11-29 03:41:59,614 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 98 transitions. Word has length 56 [2023-11-29 03:41:59,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:41:59,615 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 98 transitions. [2023-11-29 03:41:59,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 03:41:59,616 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 98 transitions. [2023-11-29 03:41:59,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 03:41:59,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:41:59,618 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, 1, 1, 1, 1] [2023-11-29 03:41:59,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 03:41:59,618 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:41:59,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:59,619 INFO L85 PathProgramCache]: Analyzing trace with hash 986750680, now seen corresponding path program 1 times [2023-11-29 03:41:59,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:59,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031350124] [2023-11-29 03:41:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:00,487 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 03:42:00,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:00,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031350124] [2023-11-29 03:42:00,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031350124] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:00,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553679050] [2023-11-29 03:42:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:00,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:00,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:00,500 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:00,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:42:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:01,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 2661 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:42:01,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:01,671 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 03:42:01,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:01,692 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 03:42:01,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553679050] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:01,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:42:01,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 03:42:01,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616603750] [2023-11-29 03:42:01,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:42:01,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:42:01,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:01,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:42:01,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:42:01,696 INFO L87 Difference]: Start difference. First operand 74 states and 98 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 03:42:02,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:42:02,167 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2023-11-29 03:42:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:42:02,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2023-11-29 03:42:02,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:42:02,169 INFO L225 Difference]: With dead ends: 86 [2023-11-29 03:42:02,170 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 03:42:02,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 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 03:42:02,171 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 3 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:42:02,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 154 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 03:42:02,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 03:42:02,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-29 03:42:02,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.337837837837838) internal successors, (99), 74 states have internal predecessors, (99), 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 03:42:02,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 99 transitions. [2023-11-29 03:42:02,181 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 99 transitions. Word has length 59 [2023-11-29 03:42:02,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:42:02,182 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 99 transitions. [2023-11-29 03:42:02,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 03:42:02,182 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 99 transitions. [2023-11-29 03:42:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 03:42:02,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:42:02,184 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:02,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:42:02,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 03:42:02,389 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:42:02,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:02,389 INFO L85 PathProgramCache]: Analyzing trace with hash -985336725, now seen corresponding path program 1 times [2023-11-29 03:42:02,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:02,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748765501] [2023-11-29 03:42:02,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:02,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:03,025 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 03:42:03,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:03,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748765501] [2023-11-29 03:42:03,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748765501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:03,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465376483] [2023-11-29 03:42:03,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:03,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:03,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:03,028 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:03,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:42:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:04,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 2679 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 03:42:04,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:04,197 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 03:42:04,198 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:42:04,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465376483] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:42:04,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:42:04,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-29 03:42:04,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581253297] [2023-11-29 03:42:04,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:42:04,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:42:04,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:04,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:42:04,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:42:04,202 INFO L87 Difference]: Start difference. First operand 75 states and 99 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 03:42:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:42:04,763 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2023-11-29 03:42:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:42:04,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2023-11-29 03:42:04,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:42:04,765 INFO L225 Difference]: With dead ends: 107 [2023-11-29 03:42:04,765 INFO L226 Difference]: Without dead ends: 80 [2023-11-29 03:42:04,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:42:04,767 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:42:04,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 156 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 03:42:04,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-29 03:42:04,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2023-11-29 03:42:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3333333333333333) internal successors, (100), 75 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 03:42:04,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2023-11-29 03:42:04,774 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 62 [2023-11-29 03:42:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:42:04,775 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2023-11-29 03:42:04,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 03:42:04,775 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2023-11-29 03:42:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 03:42:04,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:42:04,777 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:04,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 03:42:04,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 03:42:04,985 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:42:04,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:04,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1664813890, now seen corresponding path program 1 times [2023-11-29 03:42:04,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:04,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169158594] [2023-11-29 03:42:04,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:04,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:05,497 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 03:42:05,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:05,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169158594] [2023-11-29 03:42:05,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169158594] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:05,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574355561] [2023-11-29 03:42:05,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:05,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:05,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:05,500 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:05,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:42:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:06,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:42:06,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:06,527 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 03:42:06,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:06,542 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 03:42:06,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574355561] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:06,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:42:06,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-29 03:42:06,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103998712] [2023-11-29 03:42:06,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:42:06,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:42:06,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:06,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:42:06,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:42:06,544 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 03:42:06,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:42:06,920 INFO L93 Difference]: Finished difference Result 93 states and 122 transitions. [2023-11-29 03:42:06,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:42:06,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 65 [2023-11-29 03:42:06,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:42:06,922 INFO L225 Difference]: With dead ends: 93 [2023-11-29 03:42:06,922 INFO L226 Difference]: Without dead ends: 77 [2023-11-29 03:42:06,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 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 03:42:06,923 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:42:06,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 154 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:42:06,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-29 03:42:06,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-29 03:42:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.3289473684210527) internal successors, (101), 76 states have internal predecessors, (101), 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 03:42:06,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 101 transitions. [2023-11-29 03:42:06,929 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 101 transitions. Word has length 65 [2023-11-29 03:42:06,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:42:06,929 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 101 transitions. [2023-11-29 03:42:06,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 03:42:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 101 transitions. [2023-11-29 03:42:06,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 03:42:06,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:42:06,930 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:06,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 03:42:07,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:07,131 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:42:07,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:07,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1900472348, now seen corresponding path program 1 times [2023-11-29 03:42:07,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:07,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211562345] [2023-11-29 03:42:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:07,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:07,677 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 03:42:07,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:07,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211562345] [2023-11-29 03:42:07,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211562345] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:07,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338633831] [2023-11-29 03:42:07,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:07,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:07,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:07,680 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:07,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:42:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:08,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 2691 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:42:08,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:08,329 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 03:42:08,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:08,345 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 03:42:08,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338633831] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:08,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:42:08,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-29 03:42:08,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914732199] [2023-11-29 03:42:08,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:42:08,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:42:08,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:08,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:42:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:42:08,347 INFO L87 Difference]: Start difference. First operand 77 states and 101 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 03:42:08,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:42:08,747 INFO L93 Difference]: Finished difference Result 83 states and 107 transitions. [2023-11-29 03:42:08,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:42:08,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 03:42:08,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:42:08,749 INFO L225 Difference]: With dead ends: 83 [2023-11-29 03:42:08,749 INFO L226 Difference]: Without dead ends: 78 [2023-11-29 03:42:08,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 133 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 03:42:08,750 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:42:08,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 154 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:42:08,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-29 03:42:08,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-11-29 03:42:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.3246753246753247) internal successors, (102), 77 states have internal predecessors, (102), 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 03:42:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2023-11-29 03:42:08,757 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 68 [2023-11-29 03:42:08,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:42:08,757 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2023-11-29 03:42:08,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 03:42:08,758 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2023-11-29 03:42:08,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 03:42:08,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:42:08,759 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:08,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:42:08,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:08,965 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:42:08,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:08,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1506015068, now seen corresponding path program 1 times [2023-11-29 03:42:08,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:08,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15613660] [2023-11-29 03:42:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:08,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:09,450 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 03:42:09,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:09,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15613660] [2023-11-29 03:42:09,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15613660] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:09,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107101078] [2023-11-29 03:42:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:09,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:09,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:09,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 03:42:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:10,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 2697 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:42:10,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:10,557 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 03:42:10,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:10,585 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 03:42:10,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107101078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:10,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:10,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 03:42:10,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253894762] [2023-11-29 03:42:10,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:10,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 03:42:10,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:10,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 03:42:10,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:42:10,588 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 03:42:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:42:11,952 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2023-11-29 03:42:11,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:42:11,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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) Word has length 71 [2023-11-29 03:42:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:42:11,958 INFO L225 Difference]: With dead ends: 111 [2023-11-29 03:42:11,958 INFO L226 Difference]: Without dead ends: 87 [2023-11-29 03:42:11,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:42:11,959 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 11 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:42:11,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 463 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 03:42:11,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-29 03:42:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-11-29 03:42:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.3255813953488371) internal successors, (114), 86 states have internal predecessors, (114), 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 03:42:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 114 transitions. [2023-11-29 03:42:11,967 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 114 transitions. Word has length 71 [2023-11-29 03:42:11,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:42:11,969 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 114 transitions. [2023-11-29 03:42:11,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 03:42:11,970 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 114 transitions. [2023-11-29 03:42:11,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-29 03:42:11,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:42:11,971 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:42:11,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 03:42:12,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 03:42:12,187 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:42:12,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:12,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1738722315, now seen corresponding path program 2 times [2023-11-29 03:42:12,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:12,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524775214] [2023-11-29 03:42:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:12,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 03:42:13,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:13,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524775214] [2023-11-29 03:42:13,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524775214] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:13,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752963208] [2023-11-29 03:42:13,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:42:13,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:13,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:13,147 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:13,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 03:42:14,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:42:14,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:14,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 2739 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 03:42:14,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 03:42:14,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 03:42:14,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752963208] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:14,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:14,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 11 [2023-11-29 03:42:14,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354951494] [2023-11-29 03:42:14,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:14,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 03:42:14,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:14,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 03:42:14,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:42:14,544 INFO L87 Difference]: Start difference. First operand 87 states and 114 transitions. Second operand has 11 states, 11 states have (on average 9.181818181818182) internal successors, (101), 11 states have internal predecessors, (101), 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 03:42:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:42:15,901 INFO L93 Difference]: Finished difference Result 125 states and 168 transitions. [2023-11-29 03:42:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 03:42:15,901 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.181818181818182) internal successors, (101), 11 states have internal predecessors, (101), 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 80 [2023-11-29 03:42:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:42:15,903 INFO L225 Difference]: With dead ends: 125 [2023-11-29 03:42:15,903 INFO L226 Difference]: Without dead ends: 101 [2023-11-29 03:42:15,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:42:15,904 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 25 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:42:15,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 475 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 03:42:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-29 03:42:15,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2023-11-29 03:42:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.3265306122448979) internal successors, (130), 98 states have internal predecessors, (130), 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 03:42:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 130 transitions. [2023-11-29 03:42:15,913 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 130 transitions. Word has length 80 [2023-11-29 03:42:15,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:42:15,913 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 130 transitions. [2023-11-29 03:42:15,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.181818181818182) internal successors, (101), 11 states have internal predecessors, (101), 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 03:42:15,914 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 130 transitions. [2023-11-29 03:42:15,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-29 03:42:15,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:42:15,915 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:42:15,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 03:42:16,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:16,116 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:42:16,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:16,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1779525407, now seen corresponding path program 3 times [2023-11-29 03:42:16,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:16,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382896684] [2023-11-29 03:42:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:16,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 03:42:17,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:17,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382896684] [2023-11-29 03:42:17,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382896684] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:17,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357955774] [2023-11-29 03:42:17,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:42:17,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:17,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:17,110 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:17,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:42:18,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 03:42:18,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:18,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 2697 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:42:18,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 03:42:18,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-29 03:42:18,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357955774] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:18,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:42:18,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 5] total 12 [2023-11-29 03:42:18,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736422597] [2023-11-29 03:42:18,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:42:18,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:42:18,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:18,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:42:18,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:42:18,385 INFO L87 Difference]: Start difference. First operand 99 states and 130 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 03:42:18,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:42:18,841 INFO L93 Difference]: Finished difference Result 131 states and 173 transitions. [2023-11-29 03:42:18,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:42:18,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 92 [2023-11-29 03:42:18,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:42:18,842 INFO L225 Difference]: With dead ends: 131 [2023-11-29 03:42:18,842 INFO L226 Difference]: Without dead ends: 100 [2023-11-29 03:42:18,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:42:18,843 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 11 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:42:18,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 154 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:42:18,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-29 03:42:18,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-29 03:42:18,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3232323232323233) internal successors, (131), 99 states have internal predecessors, (131), 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 03:42:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 131 transitions. [2023-11-29 03:42:18,851 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 131 transitions. Word has length 92 [2023-11-29 03:42:18,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:42:18,851 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 131 transitions. [2023-11-29 03:42:18,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 03:42:18,851 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 131 transitions. [2023-11-29 03:42:18,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-29 03:42:18,852 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:42:18,852 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:42:18,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 03:42:19,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:19,053 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:42:19,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:19,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1876763282, now seen corresponding path program 1 times [2023-11-29 03:42:19,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:19,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290195378] [2023-11-29 03:42:19,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:19,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 03:42:19,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:19,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290195378] [2023-11-29 03:42:19,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290195378] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:19,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064572147] [2023-11-29 03:42:19,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:19,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:19,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:19,914 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:19,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 03:42:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:20,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 2821 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 03:42:20,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 03:42:20,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 03:42:21,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064572147] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:21,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:21,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 7] total 18 [2023-11-29 03:42:21,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480017429] [2023-11-29 03:42:21,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:21,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 03:42:21,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:21,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 03:42:21,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-29 03:42:21,037 INFO L87 Difference]: Start difference. First operand 100 states and 131 transitions. Second operand has 18 states, 18 states have (on average 7.111111111111111) internal successors, (128), 18 states have internal predecessors, (128), 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 03:42:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:42:23,640 INFO L93 Difference]: Finished difference Result 157 states and 213 transitions. [2023-11-29 03:42:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 03:42:23,641 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.111111111111111) internal successors, (128), 18 states have internal predecessors, (128), 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 95 [2023-11-29 03:42:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:42:23,642 INFO L225 Difference]: With dead ends: 157 [2023-11-29 03:42:23,642 INFO L226 Difference]: Without dead ends: 123 [2023-11-29 03:42:23,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2023-11-29 03:42:23,644 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 53 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:42:23,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 831 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 03:42:23,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-29 03:42:23,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2023-11-29 03:42:23,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.325) internal successors, (159), 120 states have internal predecessors, (159), 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 03:42:23,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 159 transitions. [2023-11-29 03:42:23,650 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 159 transitions. Word has length 95 [2023-11-29 03:42:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:42:23,651 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 159 transitions. [2023-11-29 03:42:23,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.111111111111111) internal successors, (128), 18 states have internal predecessors, (128), 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 03:42:23,651 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 159 transitions. [2023-11-29 03:42:23,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-29 03:42:23,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:42:23,653 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:42:23,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 03:42:23,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 03:42:23,854 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:42:23,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:23,854 INFO L85 PathProgramCache]: Analyzing trace with hash -850297529, now seen corresponding path program 2 times [2023-11-29 03:42:23,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:23,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061571785] [2023-11-29 03:42:23,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:23,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2023-11-29 03:42:24,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:24,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061571785] [2023-11-29 03:42:24,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061571785] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:24,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002251262] [2023-11-29 03:42:24,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:42:24,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:24,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:24,705 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:24,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 03:42:25,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:42:25,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:25,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 2943 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 03:42:25,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-11-29 03:42:25,894 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:42:25,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002251262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:42:25,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:42:25,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-11-29 03:42:25,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44949639] [2023-11-29 03:42:25,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:42:25,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:42:25,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:25,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:42:25,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:42:25,897 INFO L87 Difference]: Start difference. First operand 121 states and 159 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 03:42:26,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:42:26,402 INFO L93 Difference]: Finished difference Result 201 states and 267 transitions. [2023-11-29 03:42:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:42:26,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 116 [2023-11-29 03:42:26,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:42:26,403 INFO L225 Difference]: With dead ends: 201 [2023-11-29 03:42:26,404 INFO L226 Difference]: Without dead ends: 124 [2023-11-29 03:42:26,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:42:26,405 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 14 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:42:26,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 154 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 03:42:26,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-29 03:42:26,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2023-11-29 03:42:26,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.322314049586777) internal successors, (160), 121 states have internal predecessors, (160), 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 03:42:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 160 transitions. [2023-11-29 03:42:26,411 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 160 transitions. Word has length 116 [2023-11-29 03:42:26,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:42:26,411 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 160 transitions. [2023-11-29 03:42:26,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 03:42:26,412 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 160 transitions. [2023-11-29 03:42:26,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-29 03:42:26,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:42:26,413 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:42:26,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 03:42:26,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 03:42:26,614 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:42:26,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:26,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1297211509, now seen corresponding path program 1 times [2023-11-29 03:42:26,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:26,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920361281] [2023-11-29 03:42:26,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:26,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-29 03:42:27,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:27,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920361281] [2023-11-29 03:42:27,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920361281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:27,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896945105] [2023-11-29 03:42:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:27,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:27,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:27,477 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:27,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 03:42:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:28,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 2957 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 03:42:28,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-29 03:42:28,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 76 proven. 102 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-29 03:42:28,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896945105] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:28,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:28,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 16] total 24 [2023-11-29 03:42:28,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875839391] [2023-11-29 03:42:28,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:28,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 03:42:28,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:28,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 03:42:28,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-29 03:42:28,798 INFO L87 Difference]: Start difference. First operand 122 states and 160 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 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 03:42:32,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:42:32,919 INFO L93 Difference]: Finished difference Result 198 states and 268 transitions. [2023-11-29 03:42:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 03:42:32,919 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 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 119 [2023-11-29 03:42:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:42:32,921 INFO L225 Difference]: With dead ends: 198 [2023-11-29 03:42:32,921 INFO L226 Difference]: Without dead ends: 146 [2023-11-29 03:42:32,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2023-11-29 03:42:32,922 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 66 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:42:32,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1232 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-29 03:42:32,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-29 03:42:32,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2023-11-29 03:42:32,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3241379310344827) internal successors, (192), 145 states have internal predecessors, (192), 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 03:42:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 192 transitions. [2023-11-29 03:42:32,929 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 192 transitions. Word has length 119 [2023-11-29 03:42:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:42:32,930 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 192 transitions. [2023-11-29 03:42:32,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 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 03:42:32,930 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 192 transitions. [2023-11-29 03:42:32,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-29 03:42:32,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:42:32,931 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:42:32,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 03:42:33,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 03:42:33,132 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:42:33,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:33,132 INFO L85 PathProgramCache]: Analyzing trace with hash 525373685, now seen corresponding path program 2 times [2023-11-29 03:42:33,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:33,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405433870] [2023-11-29 03:42:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:33,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-29 03:42:34,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:34,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405433870] [2023-11-29 03:42:34,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405433870] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:34,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722997376] [2023-11-29 03:42:34,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:42:34,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:34,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:34,604 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:34,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 03:42:35,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:42:35,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:35,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 3069 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 03:42:35,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2023-11-29 03:42:36,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-11-29 03:42:36,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722997376] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:36,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:42:36,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [17, 6] total 23 [2023-11-29 03:42:36,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543349383] [2023-11-29 03:42:36,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:42:36,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:42:36,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:36,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:42:36,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2023-11-29 03:42:36,115 INFO L87 Difference]: Start difference. First operand 146 states and 192 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 03:42:36,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:42:36,529 INFO L93 Difference]: Finished difference Result 197 states and 260 transitions. [2023-11-29 03:42:36,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:42:36,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) Word has length 143 [2023-11-29 03:42:36,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:42:36,531 INFO L225 Difference]: With dead ends: 197 [2023-11-29 03:42:36,532 INFO L226 Difference]: Without dead ends: 147 [2023-11-29 03:42:36,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2023-11-29 03:42:36,533 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:42:36,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 157 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:42:36,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-29 03:42:36,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-11-29 03:42:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.321917808219178) internal successors, (193), 146 states have internal predecessors, (193), 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 03:42:36,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 193 transitions. [2023-11-29 03:42:36,540 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 193 transitions. Word has length 143 [2023-11-29 03:42:36,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:42:36,540 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 193 transitions. [2023-11-29 03:42:36,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 03:42:36,541 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 193 transitions. [2023-11-29 03:42:36,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-29 03:42:36,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:42:36,542 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:42:36,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 03:42:36,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 03:42:36,742 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:42:36,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:36,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1934356562, now seen corresponding path program 1 times [2023-11-29 03:42:36,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:36,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169950015] [2023-11-29 03:42:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:36,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-11-29 03:42:38,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:38,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169950015] [2023-11-29 03:42:38,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169950015] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:38,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324724564] [2023-11-29 03:42:38,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:38,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:38,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:38,078 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:38,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 03:42:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:39,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 3074 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 03:42:39,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 414 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 03:42:39,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2023-11-29 03:42:39,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324724564] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:39,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:39,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 13] total 39 [2023-11-29 03:42:39,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579631770] [2023-11-29 03:42:39,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:39,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 03:42:39,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:39,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 03:42:39,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 03:42:39,925 INFO L87 Difference]: Start difference. First operand 147 states and 193 transitions. Second operand has 39 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 39 states have internal predecessors, (196), 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 03:42:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:42:49,582 INFO L93 Difference]: Finished difference Result 241 states and 330 transitions. [2023-11-29 03:42:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 03:42:49,583 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 39 states have internal predecessors, (196), 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 144 [2023-11-29 03:42:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:42:49,585 INFO L225 Difference]: With dead ends: 241 [2023-11-29 03:42:49,585 INFO L226 Difference]: Without dead ends: 188 [2023-11-29 03:42:49,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=450, Invalid=1902, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 03:42:49,587 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 208 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1698 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:42:49,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 1698 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1853 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-29 03:42:49,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-29 03:42:49,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2023-11-29 03:42:49,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.3243243243243243) internal successors, (245), 185 states have internal predecessors, (245), 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 03:42:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 245 transitions. [2023-11-29 03:42:49,598 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 245 transitions. Word has length 144 [2023-11-29 03:42:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:42:49,599 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 245 transitions. [2023-11-29 03:42:49,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 39 states have internal predecessors, (196), 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 03:42:49,599 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 245 transitions. [2023-11-29 03:42:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-11-29 03:42:49,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:42:49,600 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:42:49,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 03:42:49,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 03:42:49,801 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:42:49,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:49,802 INFO L85 PathProgramCache]: Analyzing trace with hash -439221181, now seen corresponding path program 2 times [2023-11-29 03:42:49,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:49,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312962535] [2023-11-29 03:42:49,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:49,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2023-11-29 03:42:51,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:51,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312962535] [2023-11-29 03:42:51,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312962535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:51,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322554541] [2023-11-29 03:42:51,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:42:51,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:51,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:51,432 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:51,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 03:42:52,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:42:52,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:52,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 3304 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 03:42:52,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2023-11-29 03:42:52,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 322 proven. 660 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-29 03:42:54,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322554541] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:54,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:54,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 34] total 51 [2023-11-29 03:42:54,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6648892] [2023-11-29 03:42:54,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:54,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 03:42:54,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:54,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 03:42:54,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2163, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 03:42:54,396 INFO L87 Difference]: Start difference. First operand 186 states and 245 transitions. Second operand has 51 states, 51 states have (on average 4.235294117647059) internal successors, (216), 51 states have internal predecessors, (216), 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 03:43:30,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:43:30,353 INFO L93 Difference]: Finished difference Result 326 states and 447 transitions. [2023-11-29 03:43:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 03:43:30,354 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.235294117647059) internal successors, (216), 51 states have internal predecessors, (216), 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 183 [2023-11-29 03:43:30,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:43:30,356 INFO L225 Difference]: With dead ends: 326 [2023-11-29 03:43:30,357 INFO L226 Difference]: Without dead ends: 237 [2023-11-29 03:43:30,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=912, Invalid=3378, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 03:43:30,359 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 298 mSDsluCounter, 2988 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 3081 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:43:30,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 3081 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-11-29 03:43:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-29 03:43:30,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2023-11-29 03:43:30,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.326271186440678) internal successors, (313), 236 states have internal predecessors, (313), 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 03:43:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 313 transitions. [2023-11-29 03:43:30,373 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 313 transitions. Word has length 183 [2023-11-29 03:43:30,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:43:30,374 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 313 transitions. [2023-11-29 03:43:30,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.235294117647059) internal successors, (216), 51 states have internal predecessors, (216), 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 03:43:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 313 transitions. [2023-11-29 03:43:30,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-11-29 03:43:30,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:43:30,376 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:43:30,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 03:43:30,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 03:43:30,577 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:43:30,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:43:30,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1034320690, now seen corresponding path program 3 times [2023-11-29 03:43:30,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:43:30,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792905002] [2023-11-29 03:43:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:43:30,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:43:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:43:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1526 trivial. 0 not checked. [2023-11-29 03:43:32,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:43:32,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792905002] [2023-11-29 03:43:32,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792905002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:43:32,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730246675] [2023-11-29 03:43:32,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:43:32,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:43:32,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:43:32,886 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:43:32,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 03:43:34,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 03:43:34,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:43:34,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 2697 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:43:34,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:43:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [2023-11-29 03:43:34,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:43:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2240 trivial. 0 not checked. [2023-11-29 03:43:34,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730246675] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:43:34,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:43:34,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [25, 5] total 30 [2023-11-29 03:43:34,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132195673] [2023-11-29 03:43:34,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:43:34,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:43:34,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:43:34,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:43:34,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2023-11-29 03:43:34,601 INFO L87 Difference]: Start difference. First operand 237 states and 313 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 03:43:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:43:35,005 INFO L93 Difference]: Finished difference Result 248 states and 327 transitions. [2023-11-29 03:43:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:43:35,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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) Word has length 234 [2023-11-29 03:43:35,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:43:35,007 INFO L225 Difference]: With dead ends: 248 [2023-11-29 03:43:35,007 INFO L226 Difference]: Without dead ends: 238 [2023-11-29 03:43:35,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2023-11-29 03:43:35,008 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 11 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:43:35,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 154 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:43:35,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-11-29 03:43:35,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2023-11-29 03:43:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.3248945147679325) internal successors, (314), 237 states have internal predecessors, (314), 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 03:43:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 314 transitions. [2023-11-29 03:43:35,019 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 314 transitions. Word has length 234 [2023-11-29 03:43:35,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:43:35,019 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 314 transitions. [2023-11-29 03:43:35,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 03:43:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 314 transitions. [2023-11-29 03:43:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-11-29 03:43:35,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:43:35,021 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:43:35,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 03:43:35,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:43:35,221 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:43:35,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:43:35,222 INFO L85 PathProgramCache]: Analyzing trace with hash -713360811, now seen corresponding path program 1 times [2023-11-29 03:43:35,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:43:35,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219227674] [2023-11-29 03:43:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:43:35,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:43:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:43:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1527 trivial. 0 not checked. [2023-11-29 03:43:37,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:43:37,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219227674] [2023-11-29 03:43:37,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219227674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:43:37,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370959110] [2023-11-29 03:43:37,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:43:37,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:43:37,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:43:37,605 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:43:37,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 03:43:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:43:38,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 3556 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-29 03:43:38,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:43:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 0 proven. 2100 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-11-29 03:43:39,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:43:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1527 trivial. 0 not checked. [2023-11-29 03:43:40,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370959110] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:43:40,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:43:40,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 48, 25] total 72 [2023-11-29 03:43:40,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87445286] [2023-11-29 03:43:40,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:43:40,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-11-29 03:43:40,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:43:40,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-11-29 03:43:40,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=4500, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 03:43:40,890 INFO L87 Difference]: Start difference. First operand 238 states and 314 transitions. Second operand has 72 states, 72 states have (on average 3.9166666666666665) internal successors, (282), 72 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 03:43:57,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:43:57,965 INFO L93 Difference]: Finished difference Result 281 states and 379 transitions. [2023-11-29 03:43:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-29 03:43:57,966 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.9166666666666665) internal successors, (282), 72 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) Word has length 237 [2023-11-29 03:43:57,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:43:57,969 INFO L225 Difference]: With dead ends: 281 [2023-11-29 03:43:57,969 INFO L226 Difference]: Without dead ends: 268 [2023-11-29 03:43:57,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=892, Invalid=5428, Unknown=0, NotChecked=0, Total=6320 [2023-11-29 03:43:57,971 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 373 mSDsluCounter, 5428 mSDsCounter, 0 mSdLazyCounter, 6888 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 5548 SdHoareTripleChecker+Invalid, 6889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:43:57,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 5548 Invalid, 6889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6888 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2023-11-29 03:43:57,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-11-29 03:43:57,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2023-11-29 03:43:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.3258426966292134) internal successors, (354), 267 states have internal predecessors, (354), 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 03:43:57,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 354 transitions. [2023-11-29 03:43:57,984 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 354 transitions. Word has length 237 [2023-11-29 03:43:57,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:43:57,984 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 354 transitions. [2023-11-29 03:43:57,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.9166666666666665) internal successors, (282), 72 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 03:43:57,985 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 354 transitions. [2023-11-29 03:43:57,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-29 03:43:57,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:43:57,986 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:43:58,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 03:43:58,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:43:58,187 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:43:58,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:43:58,187 INFO L85 PathProgramCache]: Analyzing trace with hash 912881781, now seen corresponding path program 2 times [2023-11-29 03:43:58,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:43:58,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133039670] [2023-11-29 03:43:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:43:58,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:43:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:43:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3047 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2023-11-29 03:43:59,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:43:59,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133039670] [2023-11-29 03:43:59,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133039670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:43:59,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:43:59,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:43:59,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895970523] [2023-11-29 03:43:59,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:43:59,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:43:59,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:43:59,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:43:59,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:43:59,570 INFO L87 Difference]: Start difference. First operand 268 states and 354 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 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 03:44:00,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:44:00,019 INFO L93 Difference]: Finished difference Result 493 states and 654 transitions. [2023-11-29 03:44:00,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:44:00,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 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) Word has length 267 [2023-11-29 03:44:00,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:44:00,021 INFO L225 Difference]: With dead ends: 493 [2023-11-29 03:44:00,022 INFO L226 Difference]: Without dead ends: 269 [2023-11-29 03:44:00,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:44:00,023 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 7 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:44:00,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 156 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:44:00,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-11-29 03:44:00,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2023-11-29 03:44:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.3246268656716418) internal successors, (355), 268 states have internal predecessors, (355), 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 03:44:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 355 transitions. [2023-11-29 03:44:00,036 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 355 transitions. Word has length 267 [2023-11-29 03:44:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:44:00,036 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 355 transitions. [2023-11-29 03:44:00,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 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 03:44:00,036 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 355 transitions. [2023-11-29 03:44:00,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-11-29 03:44:00,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:44:00,038 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:00,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-29 03:44:00,038 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:44:00,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:44:00,039 INFO L85 PathProgramCache]: Analyzing trace with hash 849617399, now seen corresponding path program 1 times [2023-11-29 03:44:00,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:44:00,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085039126] [2023-11-29 03:44:00,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:44:00,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:44:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:44:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3048 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2023-11-29 03:44:01,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:44:01,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085039126] [2023-11-29 03:44:01,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085039126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:44:01,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409110005] [2023-11-29 03:44:01,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:44:01,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:44:01,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:44:01,369 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:44:01,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 03:44:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:44:02,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 3741 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 03:44:02,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:44:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3048 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3044 trivial. 0 not checked. [2023-11-29 03:44:02,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:44:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3048 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3046 trivial. 0 not checked. [2023-11-29 03:44:03,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409110005] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:44:03,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:44:03,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 6] total 11 [2023-11-29 03:44:03,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855372493] [2023-11-29 03:44:03,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:44:03,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:44:03,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:44:03,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:44:03,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:44:03,036 INFO L87 Difference]: Start difference. First operand 269 states and 355 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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 03:44:03,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:44:03,548 INFO L93 Difference]: Finished difference Result 281 states and 370 transitions. [2023-11-29 03:44:03,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:44:03,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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) Word has length 268 [2023-11-29 03:44:03,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:44:03,552 INFO L225 Difference]: With dead ends: 281 [2023-11-29 03:44:03,552 INFO L226 Difference]: Without dead ends: 270 [2023-11-29 03:44:03,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:44:03,553 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:44:03,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 157 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 03:44:03,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-11-29 03:44:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2023-11-29 03:44:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.3234200743494424) internal successors, (356), 269 states have internal predecessors, (356), 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 03:44:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 356 transitions. [2023-11-29 03:44:03,570 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 356 transitions. Word has length 268 [2023-11-29 03:44:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:44:03,571 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 356 transitions. [2023-11-29 03:44:03,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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 03:44:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 356 transitions. [2023-11-29 03:44:03,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-11-29 03:44:03,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:44:03,573 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:03,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 03:44:03,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 03:44:03,773 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:44:03,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:44:03,774 INFO L85 PathProgramCache]: Analyzing trace with hash -350447209, now seen corresponding path program 1 times [2023-11-29 03:44:03,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:44:03,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540639186] [2023-11-29 03:44:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:44:03,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:44:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:44:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3049 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3046 trivial. 0 not checked. [2023-11-29 03:44:05,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:44:05,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540639186] [2023-11-29 03:44:05,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540639186] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:44:05,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049992744] [2023-11-29 03:44:05,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:44:05,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:44:05,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:44:05,370 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:44:05,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 03:44:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:44:06,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 3746 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-29 03:44:06,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:44:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3049 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3047 trivial. 0 not checked. [2023-11-29 03:44:06,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:44:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3049 backedges. 1 proven. 1521 refuted. 0 times theorem prover too weak. 1527 trivial. 0 not checked. [2023-11-29 03:44:08,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049992744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:44:08,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:44:08,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 39] total 45 [2023-11-29 03:44:08,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371823580] [2023-11-29 03:44:08,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:44:08,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 03:44:08,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:44:08,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 03:44:08,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1882, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 03:44:08,580 INFO L87 Difference]: Start difference. First operand 270 states and 356 transitions. Second operand has 45 states, 45 states have (on average 4.333333333333333) internal successors, (195), 45 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 03:51:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:51:25,479 INFO L93 Difference]: Finished difference Result 512 states and 682 transitions. [2023-11-29 03:51:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 03:51:25,480 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.333333333333333) internal successors, (195), 45 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 269 [2023-11-29 03:51:25,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:51:25,481 INFO L225 Difference]: With dead ends: 512 [2023-11-29 03:51:25,481 INFO L226 Difference]: Without dead ends: 286 [2023-11-29 03:51:25,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 430.8s TimeCoverageRelationStatistics Valid=1312, Invalid=6695, Unknown=3, NotChecked=0, Total=8010 [2023-11-29 03:51:25,485 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 658 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 3030 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:51:25,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 3030 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2023-11-29 03:51:25,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-11-29 03:51:25,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2023-11-29 03:51:25,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.3157894736842106) internal successors, (375), 285 states have internal predecessors, (375), 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 03:51:25,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 375 transitions. [2023-11-29 03:51:25,498 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 375 transitions. Word has length 269 [2023-11-29 03:51:25,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:51:25,499 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 375 transitions. [2023-11-29 03:51:25,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.333333333333333) internal successors, (195), 45 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 03:51:25,499 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 375 transitions. [2023-11-29 03:51:25,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2023-11-29 03:51:25,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:51:25,500 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:51:25,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 03:51:25,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 03:51:25,701 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:51:25,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:51:25,701 INFO L85 PathProgramCache]: Analyzing trace with hash -136961081, now seen corresponding path program 2 times [2023-11-29 03:51:25,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:51:25,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601517123] [2023-11-29 03:51:25,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:51:25,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:51:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:51:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3129 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 3094 trivial. 0 not checked. [2023-11-29 03:51:27,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:51:27,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601517123] [2023-11-29 03:51:27,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601517123] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:51:27,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399971553] [2023-11-29 03:51:27,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:51:27,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:51:27,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:51:27,189 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:51:27,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44009ade-e0fe-46da-b88f-281472750bf4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 03:51:28,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:51:28,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:51:28,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 3823 conjuncts, 83 conjunts are in the unsatisfiable core [2023-11-29 03:51:28,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:51:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3129 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 3058 trivial. 0 not checked. [2023-11-29 03:51:28,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:51:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3129 backedges. 1 proven. 1590 refuted. 0 times theorem prover too weak. 1538 trivial. 0 not checked. [2023-11-29 03:51:30,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399971553] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:51:30,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:51:30,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 42] total 52 [2023-11-29 03:51:30,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692017344] [2023-11-29 03:51:30,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:51:30,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-29 03:51:30,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:51:30,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-29 03:51:30,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2511, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 03:51:30,753 INFO L87 Difference]: Start difference. First operand 286 states and 375 transitions. Second operand has 52 states, 52 states have (on average 4.288461538461538) internal successors, (223), 52 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)