./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/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_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/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_00010350-870d-4089-9b36-a6020d2bb8df/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 32a779d95d64b7b3ae1a801430dde2c7d15b3372c5d0cdd47679441a42687631 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:27:55,858 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:27:55,923 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:27:55,929 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:27:55,930 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:27:55,955 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:27:55,956 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:27:55,956 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:27:55,957 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:27:55,957 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:27:55,958 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:27:55,958 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:27:55,959 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:27:55,960 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:27:55,960 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:27:55,961 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:27:55,961 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:27:55,976 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:27:55,977 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:27:55,977 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:27:55,978 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:27:55,978 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:27:55,979 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:27:55,979 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:27:55,980 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:27:55,980 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:27:55,981 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:27:55,981 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:27:55,982 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:27:55,982 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:27:55,982 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:27:55,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:27:55,983 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:27:55,983 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:27:55,984 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:27:55,984 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:27:55,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:27:55,984 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:27:55,984 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:27:55,985 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:27:55,985 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:27:55,985 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:27:55,985 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_00010350-870d-4089-9b36-a6020d2bb8df/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32a779d95d64b7b3ae1a801430dde2c7d15b3372c5d0cdd47679441a42687631 [2023-11-29 01:27:56,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:27:56,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:27:56,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:27:56,258 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:27:56,259 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:27:56,260 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-2.i [2023-11-29 01:28:01,081 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:28:01,357 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:28:01,358 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-2.i [2023-11-29 01:28:01,375 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/data/f2cf375a7/a86a994e15614c589b489fa5c750662b/FLAG6f09f9690 [2023-11-29 01:28:01,388 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/data/f2cf375a7/a86a994e15614c589b489fa5c750662b [2023-11-29 01:28:01,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:28:01,392 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:28:01,393 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:28:01,393 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:28:01,397 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:28:01,397 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:28:01" (1/1) ... [2023-11-29 01:28:01,398 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32b887fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:28:01, skipping insertion in model container [2023-11-29 01:28:01,398 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:28:01" (1/1) ... [2023-11-29 01:28:01,461 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:28:01,813 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_00010350-870d-4089-9b36-a6020d2bb8df/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-2.i[33021,33034] [2023-11-29 01:28:01,910 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_00010350-870d-4089-9b36-a6020d2bb8df/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-2.i[44590,44603] [2023-11-29 01:28:01,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:28:01,939 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:28:01,974 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_00010350-870d-4089-9b36-a6020d2bb8df/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-2.i[33021,33034] [2023-11-29 01:28:02,033 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_00010350-870d-4089-9b36-a6020d2bb8df/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-2.i[44590,44603] [2023-11-29 01:28:02,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:28:02,078 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:28:02,086 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:28:02,087 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:28:02 WrapperNode [2023-11-29 01:28:02,087 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:28:02,088 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:28:02,088 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:28:02,088 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:28:02,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:28:02" (1/1) ... [2023-11-29 01:28:02,130 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:28:02" (1/1) ... [2023-11-29 01:28:02,200 INFO L138 Inliner]: procedures = 177, calls = 336, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1524 [2023-11-29 01:28:02,200 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:28:02,201 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:28:02,201 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:28:02,201 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:28:02,213 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:28:02" (1/1) ... [2023-11-29 01:28:02,213 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:28:02" (1/1) ... [2023-11-29 01:28:02,227 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:28:02" (1/1) ... [2023-11-29 01:28:02,320 INFO L175 MemorySlicer]: Split 308 memory accesses to 4 slices as follows [2, 34, 5, 267]. 87 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 63 writes are split as follows [0, 4, 1, 58]. [2023-11-29 01:28:02,320 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:28:02" (1/1) ... [2023-11-29 01:28:02,320 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:28:02" (1/1) ... [2023-11-29 01:28:02,365 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:28:02" (1/1) ... [2023-11-29 01:28:02,403 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:28:02" (1/1) ... [2023-11-29 01:28:02,409 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:28:02" (1/1) ... [2023-11-29 01:28:02,420 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:28:02" (1/1) ... [2023-11-29 01:28:02,436 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:28:02,438 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:28:02,438 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:28:02,439 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:28:02,439 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:28:02" (1/1) ... [2023-11-29 01:28:02,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:28:02,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:28:02,473 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:28:02,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:28:02,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:28:02,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:28:02,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:28:02,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 01:28:02,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 01:28:02,552 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 01:28:02,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:28:02,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:28:02,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:28:02,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 01:28:02,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-29 01:28:02,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-29 01:28:02,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-29 01:28:02,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-29 01:28:02,553 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-29 01:28:02,554 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-29 01:28:02,554 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-29 01:28:02,554 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-29 01:28:02,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 01:28:02,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:28:02,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 01:28:02,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 01:28:02,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 01:28:02,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-29 01:28:02,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:28:02,555 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-29 01:28:02,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 01:28:02,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 01:28:02,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 01:28:02,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-29 01:28:02,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:28:02,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:28:02,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:28:02,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:28:02,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 01:28:02,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:28:02,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:28:02,768 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:28:02,769 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:28:04,145 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:28:04,188 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:28:04,189 INFO L309 CfgBuilder]: Removed 72 assume(true) statements. [2023-11-29 01:28:04,189 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:28:04 BoogieIcfgContainer [2023-11-29 01:28:04,190 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:28:04,192 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:28:04,192 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:28:04,195 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:28:04,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:28:01" (1/3) ... [2023-11-29 01:28:04,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8cfbfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:28:04, skipping insertion in model container [2023-11-29 01:28:04,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:28:02" (2/3) ... [2023-11-29 01:28:04,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8cfbfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:28:04, skipping insertion in model container [2023-11-29 01:28:04,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:28:04" (3/3) ... [2023-11-29 01:28:04,198 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_test3-2.i [2023-11-29 01:28:04,212 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:28:04,212 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-29 01:28:04,261 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:28:04,267 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;@7401198b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:28:04,267 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 01:28:04,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 397 states, 384 states have (on average 1.7057291666666667) internal successors, (655), 391 states have internal predecessors, (655), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 01:28:04,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 01:28:04,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:28:04,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:28:04,280 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:28:04,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:28:04,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1671213467, now seen corresponding path program 1 times [2023-11-29 01:28:04,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:28:04,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679406705] [2023-11-29 01:28:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:04,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:28:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:28:04,452 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 01:28:04,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:28:04,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679406705] [2023-11-29 01:28:04,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679406705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:28:04,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:28:04,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:28:04,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374409541] [2023-11-29 01:28:04,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:28:04,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 01:28:04,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:28:04,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 01:28:04,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:28:04,490 INFO L87 Difference]: Start difference. First operand has 397 states, 384 states have (on average 1.7057291666666667) internal successors, (655), 391 states have internal predecessors, (655), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:28:04,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:28:04,571 INFO L93 Difference]: Finished difference Result 793 states and 1346 transitions. [2023-11-29 01:28:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 01:28:04,577 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2023-11-29 01:28:04,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:28:04,590 INFO L225 Difference]: With dead ends: 793 [2023-11-29 01:28:04,590 INFO L226 Difference]: Without dead ends: 362 [2023-11-29 01:28:04,596 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 01:28:04,599 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:28:04,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 588 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:28:04,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-11-29 01:28:04,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2023-11-29 01:28:04,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 350 states have (on average 1.5114285714285713) internal successors, (529), 356 states have internal predecessors, (529), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 01:28:04,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 545 transitions. [2023-11-29 01:28:04,658 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 545 transitions. Word has length 8 [2023-11-29 01:28:04,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:28:04,658 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 545 transitions. [2023-11-29 01:28:04,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:28:04,658 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 545 transitions. [2023-11-29 01:28:04,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 01:28:04,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:28:04,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:28:04,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:28:04,660 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:28:04,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:28:04,661 INFO L85 PathProgramCache]: Analyzing trace with hash 894347900, now seen corresponding path program 1 times [2023-11-29 01:28:04,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:28:04,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106212309] [2023-11-29 01:28:04,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:04,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:28:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:28:04,833 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 01:28:04,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:28:04,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106212309] [2023-11-29 01:28:04,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106212309] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:28:04,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:28:04,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:28:04,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956408435] [2023-11-29 01:28:04,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:28:04,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:28:04,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:28:04,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:28:04,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:28:04,838 INFO L87 Difference]: Start difference. First operand 362 states and 545 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:28:05,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:28:05,039 INFO L93 Difference]: Finished difference Result 898 states and 1360 transitions. [2023-11-29 01:28:05,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:28:05,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-29 01:28:05,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:28:05,046 INFO L225 Difference]: With dead ends: 898 [2023-11-29 01:28:05,047 INFO L226 Difference]: Without dead ends: 713 [2023-11-29 01:28:05,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:28:05,049 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 516 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:28:05,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 1564 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:28:05,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2023-11-29 01:28:05,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 364. [2023-11-29 01:28:05,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 352 states have (on average 1.5085227272727273) internal successors, (531), 358 states have internal predecessors, (531), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 01:28:05,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 547 transitions. [2023-11-29 01:28:05,084 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 547 transitions. Word has length 13 [2023-11-29 01:28:05,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:28:05,085 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 547 transitions. [2023-11-29 01:28:05,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:28:05,085 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 547 transitions. [2023-11-29 01:28:05,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 01:28:05,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:28:05,090 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:28:05,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:28:05,091 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:28:05,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:28:05,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1341207120, now seen corresponding path program 1 times [2023-11-29 01:28:05,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:28:05,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245373813] [2023-11-29 01:28:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:05,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:28:05,171 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:28:05,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632026107] [2023-11-29 01:28:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:05,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:05,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:28:05,182 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:28:05,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:28:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:28:05,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:28:05,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:28:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:28:05,567 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:28:05,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:28:05,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245373813] [2023-11-29 01:28:05,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:28:05,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632026107] [2023-11-29 01:28:05,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632026107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:28:05,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:28:05,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:28:05,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824052042] [2023-11-29 01:28:05,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:28:05,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:28:05,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:28:05,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:28:05,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:28:05,571 INFO L87 Difference]: Start difference. First operand 364 states and 547 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:28:05,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:28:05,670 INFO L93 Difference]: Finished difference Result 746 states and 1122 transitions. [2023-11-29 01:28:05,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:28:05,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2023-11-29 01:28:05,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:28:05,675 INFO L225 Difference]: With dead ends: 746 [2023-11-29 01:28:05,675 INFO L226 Difference]: Without dead ends: 385 [2023-11-29 01:28:05,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 87 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 01:28:05,677 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 9 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:28:05,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1030 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:28:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-11-29 01:28:05,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 384. [2023-11-29 01:28:05,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 372 states have (on average 1.4811827956989247) internal successors, (551), 378 states have internal predecessors, (551), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 01:28:05,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 567 transitions. [2023-11-29 01:28:05,695 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 567 transitions. Word has length 89 [2023-11-29 01:28:05,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:28:05,695 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 567 transitions. [2023-11-29 01:28:05,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:28:05,696 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 567 transitions. [2023-11-29 01:28:05,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 01:28:05,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:28:05,699 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:28:05,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:28:05,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:05,903 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:28:05,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:28:05,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1986409522, now seen corresponding path program 1 times [2023-11-29 01:28:05,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:28:05,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545405157] [2023-11-29 01:28:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:05,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:28:05,981 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:28:05,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760371812] [2023-11-29 01:28:05,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:05,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:05,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:28:05,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:28:05,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:28:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:28:06,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:28:06,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:28:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:28:06,338 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:28:06,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:28:06,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545405157] [2023-11-29 01:28:06,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:28:06,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760371812] [2023-11-29 01:28:06,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760371812] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:28:06,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:28:06,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:28:06,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832786450] [2023-11-29 01:28:06,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:28:06,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:28:06,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:28:06,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:28:06,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:28:06,341 INFO L87 Difference]: Start difference. First operand 384 states and 567 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:28:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:28:06,434 INFO L93 Difference]: Finished difference Result 752 states and 1118 transitions. [2023-11-29 01:28:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:28:06,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2023-11-29 01:28:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:28:06,438 INFO L225 Difference]: With dead ends: 752 [2023-11-29 01:28:06,438 INFO L226 Difference]: Without dead ends: 371 [2023-11-29 01:28:06,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:28:06,440 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 165 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:28:06,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1393 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:28:06,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-11-29 01:28:06,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 370. [2023-11-29 01:28:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 358 states have (on average 1.4804469273743017) internal successors, (530), 364 states have internal predecessors, (530), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 01:28:06,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 546 transitions. [2023-11-29 01:28:06,455 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 546 transitions. Word has length 89 [2023-11-29 01:28:06,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:28:06,456 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 546 transitions. [2023-11-29 01:28:06,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:28:06,456 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 546 transitions. [2023-11-29 01:28:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 01:28:06,459 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:28:06,459 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:28:06,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 01:28:06,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-29 01:28:06,660 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:28:06,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:28:06,660 INFO L85 PathProgramCache]: Analyzing trace with hash -277205540, now seen corresponding path program 1 times [2023-11-29 01:28:06,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:28:06,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877708031] [2023-11-29 01:28:06,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:06,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:28:06,709 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:28:06,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87212610] [2023-11-29 01:28:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:06,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:06,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:28:06,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:28:06,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:28:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:28:07,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:28:07,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:28:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:28:07,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:28:07,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:28:07,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877708031] [2023-11-29 01:28:07,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:28:07,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87212610] [2023-11-29 01:28:07,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87212610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:28:07,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:28:07,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:28:07,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696699954] [2023-11-29 01:28:07,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:28:07,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:28:07,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:28:07,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:28:07,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:28:07,289 INFO L87 Difference]: Start difference. First operand 370 states and 546 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:28:07,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:28:07,407 INFO L93 Difference]: Finished difference Result 1011 states and 1511 transitions. [2023-11-29 01:28:07,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:28:07,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2023-11-29 01:28:07,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:28:07,413 INFO L225 Difference]: With dead ends: 1011 [2023-11-29 01:28:07,413 INFO L226 Difference]: Without dead ends: 644 [2023-11-29 01:28:07,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 87 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 01:28:07,415 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 354 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:28:07,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1231 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:28:07,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2023-11-29 01:28:07,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 628. [2023-11-29 01:28:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 616 states have (on average 1.5016233766233766) internal successors, (925), 622 states have internal predecessors, (925), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 01:28:07,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 941 transitions. [2023-11-29 01:28:07,436 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 941 transitions. Word has length 89 [2023-11-29 01:28:07,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:28:07,437 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 941 transitions. [2023-11-29 01:28:07,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:28:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 941 transitions. [2023-11-29 01:28:07,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-29 01:28:07,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:28:07,438 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:28:07,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:28:07,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:07,639 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:28:07,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:28:07,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1101041716, now seen corresponding path program 1 times [2023-11-29 01:28:07,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:28:07,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360204157] [2023-11-29 01:28:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:07,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:28:07,689 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:28:07,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234007728] [2023-11-29 01:28:07,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:07,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:07,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:28:07,691 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:28:07,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:28:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:28:08,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:28:08,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:28:08,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:28:08,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:28:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:28:08,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:28:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:28:08,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:28:08,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360204157] [2023-11-29 01:28:08,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:28:08,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234007728] [2023-11-29 01:28:08,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234007728] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:28:08,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:28:08,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-29 01:28:08,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582514260] [2023-11-29 01:28:08,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:28:08,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:28:08,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:28:08,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:28:08,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:28:08,538 INFO L87 Difference]: Start difference. First operand 628 states and 941 transitions. Second operand has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:28:08,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:28:08,989 INFO L93 Difference]: Finished difference Result 2085 states and 3114 transitions. [2023-11-29 01:28:08,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:28:08,990 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 102 [2023-11-29 01:28:08,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:28:09,001 INFO L225 Difference]: With dead ends: 2085 [2023-11-29 01:28:09,001 INFO L226 Difference]: Without dead ends: 1759 [2023-11-29 01:28:09,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:28:09,004 INFO L413 NwaCegarLoop]: 754 mSDtfsCounter, 2377 mSDsluCounter, 3549 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2395 SdHoareTripleChecker+Valid, 4303 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:28:09,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2395 Valid, 4303 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:28:09,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2023-11-29 01:28:09,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1049. [2023-11-29 01:28:09,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1027 states have (on average 1.4683544303797469) internal successors, (1508), 1033 states have internal predecessors, (1508), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 01:28:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1542 transitions. [2023-11-29 01:28:09,057 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1542 transitions. Word has length 102 [2023-11-29 01:28:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:28:09,057 INFO L495 AbstractCegarLoop]: Abstraction has 1049 states and 1542 transitions. [2023-11-29 01:28:09,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:28:09,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1542 transitions. [2023-11-29 01:28:09,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2023-11-29 01:28:09,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:28:09,063 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:28:09,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:28:09,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:09,270 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:28:09,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:28:09,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1519398484, now seen corresponding path program 1 times [2023-11-29 01:28:09,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:28:09,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072753239] [2023-11-29 01:28:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:09,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:28:09,438 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:28:09,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763867950] [2023-11-29 01:28:09,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:09,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:09,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:28:09,441 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:28:09,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:28:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:28:10,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:28:10,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:28:10,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:28:10,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:28:10,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:28:10,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:28:10,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:28:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:28:10,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:28:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:28:11,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:28:11,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072753239] [2023-11-29 01:28:11,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:28:11,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763867950] [2023-11-29 01:28:11,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763867950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:28:11,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:28:11,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-29 01:28:11,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108462556] [2023-11-29 01:28:11,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:28:11,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:28:11,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:28:11,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:28:11,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:28:11,308 INFO L87 Difference]: Start difference. First operand 1049 states and 1542 transitions. Second operand has 15 states, 15 states have (on average 42.46666666666667) internal successors, (637), 15 states have internal predecessors, (637), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:28:12,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:28:12,587 INFO L93 Difference]: Finished difference Result 4116 states and 6150 transitions. [2023-11-29 01:28:12,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 01:28:12,588 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 42.46666666666667) internal successors, (637), 15 states have internal predecessors, (637), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 330 [2023-11-29 01:28:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:28:12,610 INFO L225 Difference]: With dead ends: 4116 [2023-11-29 01:28:12,610 INFO L226 Difference]: Without dead ends: 3790 [2023-11-29 01:28:12,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 642 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:28:12,613 INFO L413 NwaCegarLoop]: 2017 mSDtfsCounter, 8208 mSDsluCounter, 15684 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8259 SdHoareTripleChecker+Valid, 17701 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:28:12,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8259 Valid, 17701 Invalid, 977 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [77 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 01:28:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2023-11-29 01:28:12,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 2123. [2023-11-29 01:28:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2083 states have (on average 1.4527124339894384) internal successors, (3026), 2089 states have internal predecessors, (3026), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-29 01:28:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 3096 transitions. [2023-11-29 01:28:12,706 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 3096 transitions. Word has length 330 [2023-11-29 01:28:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:28:12,707 INFO L495 AbstractCegarLoop]: Abstraction has 2123 states and 3096 transitions. [2023-11-29 01:28:12,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 42.46666666666667) internal successors, (637), 15 states have internal predecessors, (637), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:28:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 3096 transitions. [2023-11-29 01:28:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 787 [2023-11-29 01:28:12,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:28:12,733 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:28:12,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:28:12,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:12,936 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:28:12,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:28:12,936 INFO L85 PathProgramCache]: Analyzing trace with hash -453461356, now seen corresponding path program 2 times [2023-11-29 01:28:12,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:28:12,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699373217] [2023-11-29 01:28:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:12,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:28:13,260 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:28:13,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069391752] [2023-11-29 01:28:13,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:28:13,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:13,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:28:13,262 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:28:13,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:28:14,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:28:14,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:28:14,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:28:14,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:28:14,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:28:14,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 01:28:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3425 trivial. 0 not checked. [2023-11-29 01:28:14,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:28:14,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:28:14,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699373217] [2023-11-29 01:28:14,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:28:14,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069391752] [2023-11-29 01:28:14,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069391752] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:28:14,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:28:14,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:28:14,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048596865] [2023-11-29 01:28:14,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:28:14,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:28:14,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:28:14,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:28:14,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:28:14,148 INFO L87 Difference]: Start difference. First operand 2123 states and 3096 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:28:14,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:28:14,296 INFO L93 Difference]: Finished difference Result 2337 states and 3416 transitions. [2023-11-29 01:28:14,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:28:14,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 786 [2023-11-29 01:28:14,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:28:14,312 INFO L225 Difference]: With dead ends: 2337 [2023-11-29 01:28:14,312 INFO L226 Difference]: Without dead ends: 2318 [2023-11-29 01:28:14,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:28:14,314 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 492 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:28:14,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 1544 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:28:14,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2023-11-29 01:28:14,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2125. [2023-11-29 01:28:14,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2125 states, 2085 states have (on average 1.4522781774580336) internal successors, (3028), 2091 states have internal predecessors, (3028), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-29 01:28:14,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2125 states to 2125 states and 3098 transitions. [2023-11-29 01:28:14,392 INFO L78 Accepts]: Start accepts. Automaton has 2125 states and 3098 transitions. Word has length 786 [2023-11-29 01:28:14,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:28:14,394 INFO L495 AbstractCegarLoop]: Abstraction has 2125 states and 3098 transitions. [2023-11-29 01:28:14,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:28:14,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2125 states and 3098 transitions. [2023-11-29 01:28:14,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 837 [2023-11-29 01:28:14,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:28:14,425 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:28:14,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 01:28:14,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:14,626 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:28:14,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:28:14,626 INFO L85 PathProgramCache]: Analyzing trace with hash -28926261, now seen corresponding path program 1 times [2023-11-29 01:28:14,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:28:14,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550194713] [2023-11-29 01:28:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:14,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:28:14,964 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:28:14,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390014642] [2023-11-29 01:28:14,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:14,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:14,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:28:14,968 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:28:14,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:28:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:28:16,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 4052 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:28:16,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:28:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3425 trivial. 0 not checked. [2023-11-29 01:28:16,477 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:28:16,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:28:16,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550194713] [2023-11-29 01:28:16,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:28:16,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390014642] [2023-11-29 01:28:16,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390014642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:28:16,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:28:16,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:28:16,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837912712] [2023-11-29 01:28:16,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:28:16,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:28:16,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:28:16,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:28:16,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:28:16,480 INFO L87 Difference]: Start difference. First operand 2125 states and 3098 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:28:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:28:16,571 INFO L93 Difference]: Finished difference Result 2492 states and 3658 transitions. [2023-11-29 01:28:16,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:28:16,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 836 [2023-11-29 01:28:16,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:28:16,583 INFO L225 Difference]: With dead ends: 2492 [2023-11-29 01:28:16,583 INFO L226 Difference]: Without dead ends: 2167 [2023-11-29 01:28:16,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 835 GetRequests, 834 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 01:28:16,585 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 8 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:28:16,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1018 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:28:16,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2023-11-29 01:28:16,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 2165. [2023-11-29 01:28:16,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2125 states have (on average 1.4437647058823528) internal successors, (3068), 2131 states have internal predecessors, (3068), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-29 01:28:16,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 3138 transitions. [2023-11-29 01:28:16,659 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 3138 transitions. Word has length 836 [2023-11-29 01:28:16,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:28:16,661 INFO L495 AbstractCegarLoop]: Abstraction has 2165 states and 3138 transitions. [2023-11-29 01:28:16,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:28:16,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 3138 transitions. [2023-11-29 01:28:16,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 837 [2023-11-29 01:28:16,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:28:16,689 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:28:16,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:28:16,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:16,892 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:28:16,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:28:16,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1000433037, now seen corresponding path program 1 times [2023-11-29 01:28:16,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:28:16,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439566293] [2023-11-29 01:28:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:16,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:28:17,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:28:17,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808702749] [2023-11-29 01:28:17,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:17,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:17,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:28:17,151 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:28:17,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:28:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:28:18,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 4054 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:28:18,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:28:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3425 trivial. 0 not checked. [2023-11-29 01:28:18,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:28:18,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:28:18,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439566293] [2023-11-29 01:28:18,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:28:18,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808702749] [2023-11-29 01:28:18,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808702749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:28:18,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:28:18,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:28:18,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999762606] [2023-11-29 01:28:18,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:28:18,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:28:18,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:28:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:28:18,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:28:18,643 INFO L87 Difference]: Start difference. First operand 2165 states and 3138 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:28:18,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:28:18,740 INFO L93 Difference]: Finished difference Result 2504 states and 3650 transitions. [2023-11-29 01:28:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:28:18,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 836 [2023-11-29 01:28:18,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:28:18,754 INFO L225 Difference]: With dead ends: 2504 [2023-11-29 01:28:18,754 INFO L226 Difference]: Without dead ends: 2139 [2023-11-29 01:28:18,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 835 GetRequests, 832 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:28:18,756 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 163 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:28:18,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1502 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:28:18,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2023-11-29 01:28:18,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2137. [2023-11-29 01:28:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2097 states have (on average 1.4430138292799237) internal successors, (3026), 2103 states have internal predecessors, (3026), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-29 01:28:18,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 3096 transitions. [2023-11-29 01:28:18,848 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 3096 transitions. Word has length 836 [2023-11-29 01:28:18,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:28:18,850 INFO L495 AbstractCegarLoop]: Abstraction has 2137 states and 3096 transitions. [2023-11-29 01:28:18,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:28:18,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 3096 transitions. [2023-11-29 01:28:18,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 837 [2023-11-29 01:28:18,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:28:18,862 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:28:18,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:28:19,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:28:19,063 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:28:19,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:28:19,063 INFO L85 PathProgramCache]: Analyzing trace with hash 184379583, now seen corresponding path program 1 times [2023-11-29 01:28:19,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:28:19,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731406928] [2023-11-29 01:28:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:19,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:28:19,316 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:28:19,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688704534] [2023-11-29 01:28:19,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:19,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:19,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:28:19,317 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:28:19,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:28:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:28:20,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 4040 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:28:20,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:28:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3425 trivial. 0 not checked. [2023-11-29 01:28:20,905 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:28:20,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:28:20,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731406928] [2023-11-29 01:28:20,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:28:20,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688704534] [2023-11-29 01:28:20,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688704534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:28:20,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:28:20,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:28:20,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878103957] [2023-11-29 01:28:20,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:28:20,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:28:20,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:28:20,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:28:20,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:28:20,908 INFO L87 Difference]: Start difference. First operand 2137 states and 3096 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:28:20,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:28:20,982 INFO L93 Difference]: Finished difference Result 2384 states and 3442 transitions. [2023-11-29 01:28:20,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:28:20,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 836 [2023-11-29 01:28:20,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:28:20,996 INFO L225 Difference]: With dead ends: 2384 [2023-11-29 01:28:20,996 INFO L226 Difference]: Without dead ends: 2047 [2023-11-29 01:28:20,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 833 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:28:20,998 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 78 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:28:20,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1240 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:28:21,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2047 states. [2023-11-29 01:28:21,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2047 to 2047. [2023-11-29 01:28:21,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2007 states have (on average 1.430991529646238) internal successors, (2872), 2013 states have internal predecessors, (2872), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-29 01:28:21,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 2942 transitions. [2023-11-29 01:28:21,061 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 2942 transitions. Word has length 836 [2023-11-29 01:28:21,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:28:21,062 INFO L495 AbstractCegarLoop]: Abstraction has 2047 states and 2942 transitions. [2023-11-29 01:28:21,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:28:21,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 2942 transitions. [2023-11-29 01:28:21,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 837 [2023-11-29 01:28:21,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:28:21,102 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:28:21,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:28:21,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 01:28:21,308 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:28:21,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:28:21,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1213738881, now seen corresponding path program 1 times [2023-11-29 01:28:21,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:28:21,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476075074] [2023-11-29 01:28:21,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:21,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:28:21,554 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:28:21,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705594705] [2023-11-29 01:28:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:21,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:21,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:28:21,555 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:28:21,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:28:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:28:23,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 4042 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:28:23,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:28:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 1062 proven. 0 refuted. 0 times theorem prover too weak. 2363 trivial. 0 not checked. [2023-11-29 01:28:25,141 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:28:25,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:28:25,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476075074] [2023-11-29 01:28:25,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:28:25,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705594705] [2023-11-29 01:28:25,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705594705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:28:25,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:28:25,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:28:25,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576755242] [2023-11-29 01:28:25,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:28:25,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:28:25,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:28:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:28:25,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:28:25,144 INFO L87 Difference]: Start difference. First operand 2047 states and 2942 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:28:25,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:28:25,277 INFO L93 Difference]: Finished difference Result 5119 states and 7377 transitions. [2023-11-29 01:28:25,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:28:25,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 836 [2023-11-29 01:28:25,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:28:25,292 INFO L225 Difference]: With dead ends: 5119 [2023-11-29 01:28:25,292 INFO L226 Difference]: Without dead ends: 3553 [2023-11-29 01:28:25,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 835 GetRequests, 834 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 01:28:25,295 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 292 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:28:25,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 1116 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:28:25,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2023-11-29 01:28:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 3537. [2023-11-29 01:28:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3537 states, 3488 states have (on average 1.4372133027522935) internal successors, (5013), 3494 states have internal predecessors, (5013), 44 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-29 01:28:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3537 states to 3537 states and 5101 transitions. [2023-11-29 01:28:25,368 INFO L78 Accepts]: Start accepts. Automaton has 3537 states and 5101 transitions. Word has length 836 [2023-11-29 01:28:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:28:25,369 INFO L495 AbstractCegarLoop]: Abstraction has 3537 states and 5101 transitions. [2023-11-29 01:28:25,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:28:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3537 states and 5101 transitions. [2023-11-29 01:28:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 847 [2023-11-29 01:28:25,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:28:25,380 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:28:25,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:28:25,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 01:28:25,581 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:28:25,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:28:25,582 INFO L85 PathProgramCache]: Analyzing trace with hash -901114604, now seen corresponding path program 1 times [2023-11-29 01:28:25,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:28:25,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302576948] [2023-11-29 01:28:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:25,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:28:25,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:28:25,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292067455] [2023-11-29 01:28:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:28:25,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:28:25,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:28:25,877 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:28:25,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:29:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:29:03,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 4078 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 01:29:03,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:29:03,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:29:03,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:29:04,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:29:04,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:29:04,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:29:04,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:29:04,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:29:04,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-29 01:29:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 1855 proven. 582 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2023-11-29 01:29:04,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:29:05,575 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:29:05,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2023-11-29 01:29:22,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:29:22,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302576948] [2023-11-29 01:29:22,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:29:22,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292067455] [2023-11-29 01:29:22,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292067455] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:29:22,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:29:22,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-29 01:29:22,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707062957] [2023-11-29 01:29:22,792 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:29:22,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:29:22,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:29:22,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:29:22,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2023-11-29 01:29:22,795 INFO L87 Difference]: Start difference. First operand 3537 states and 5101 transitions. Second operand has 19 states, 19 states have (on average 25.894736842105264) internal successors, (492), 18 states have internal predecessors, (492), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:29:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:29:34,384 INFO L93 Difference]: Finished difference Result 6795 states and 9728 transitions. [2023-11-29 01:29:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 01:29:34,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 25.894736842105264) internal successors, (492), 18 states have internal predecessors, (492), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 846 [2023-11-29 01:29:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:29:34,402 INFO L225 Difference]: With dead ends: 6795 [2023-11-29 01:29:34,402 INFO L226 Difference]: Without dead ends: 4521 [2023-11-29 01:29:34,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1631 GetRequests, 1590 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=273, Invalid=1287, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 01:29:34,407 INFO L413 NwaCegarLoop]: 1703 mSDtfsCounter, 2307 mSDsluCounter, 17685 mSDsCounter, 0 mSdLazyCounter, 7933 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2331 SdHoareTripleChecker+Valid, 19388 SdHoareTripleChecker+Invalid, 7947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 7933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:29:34,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2331 Valid, 19388 Invalid, 7947 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 7933 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2023-11-29 01:29:34,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2023-11-29 01:29:34,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3601. [2023-11-29 01:29:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3601 states, 3552 states have (on average 1.4321509009009008) internal successors, (5087), 3558 states have internal predecessors, (5087), 44 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-29 01:29:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 5175 transitions. [2023-11-29 01:29:34,523 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 5175 transitions. Word has length 846 [2023-11-29 01:29:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:29:34,524 INFO L495 AbstractCegarLoop]: Abstraction has 3601 states and 5175 transitions. [2023-11-29 01:29:34,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 25.894736842105264) internal successors, (492), 18 states have internal predecessors, (492), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:29:34,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 5175 transitions. [2023-11-29 01:29:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 847 [2023-11-29 01:29:34,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:29:34,540 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:29:34,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 01:29:34,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 01:29:34,741 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:29:34,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:29:34,741 INFO L85 PathProgramCache]: Analyzing trace with hash 763016982, now seen corresponding path program 1 times [2023-11-29 01:29:34,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:29:34,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094301816] [2023-11-29 01:29:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:29:34,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:29:35,009 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:29:35,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843104903] [2023-11-29 01:29:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:29:35,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:29:35,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:29:35,010 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:29:35,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:29:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:29:36,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 4076 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:29:36,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:29:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 1914 proven. 0 refuted. 0 times theorem prover too weak. 1511 trivial. 0 not checked. [2023-11-29 01:29:36,644 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:29:36,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:29:36,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094301816] [2023-11-29 01:29:36,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:29:36,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843104903] [2023-11-29 01:29:36,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843104903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:29:36,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:29:36,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:29:36,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753142477] [2023-11-29 01:29:36,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:29:36,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:29:36,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:29:36,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:29:36,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:29:36,648 INFO L87 Difference]: Start difference. First operand 3601 states and 5175 transitions. Second operand has 4 states, 4 states have (on average 63.0) internal successors, (252), 4 states have internal predecessors, (252), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:29:36,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:29:36,733 INFO L93 Difference]: Finished difference Result 6320 states and 8916 transitions. [2023-11-29 01:29:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:29:36,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 4 states have internal predecessors, (252), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 846 [2023-11-29 01:29:36,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:29:36,742 INFO L225 Difference]: With dead ends: 6320 [2023-11-29 01:29:36,742 INFO L226 Difference]: Without dead ends: 2727 [2023-11-29 01:29:36,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 843 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:29:36,747 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 78 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:29:36,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1027 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:29:36,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2023-11-29 01:29:36,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2727. [2023-11-29 01:29:36,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2678 states have (on average 1.3536221060492906) internal successors, (3625), 2684 states have internal predecessors, (3625), 44 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-29 01:29:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3713 transitions. [2023-11-29 01:29:36,829 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3713 transitions. Word has length 846 [2023-11-29 01:29:36,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:29:36,830 INFO L495 AbstractCegarLoop]: Abstraction has 2727 states and 3713 transitions. [2023-11-29 01:29:36,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 4 states have internal predecessors, (252), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:29:36,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3713 transitions. [2023-11-29 01:29:36,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 848 [2023-11-29 01:29:36,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:29:36,843 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:29:36,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:29:37,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 01:29:37,044 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:29:37,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:29:37,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1917070879, now seen corresponding path program 1 times [2023-11-29 01:29:37,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:29:37,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694560788] [2023-11-29 01:29:37,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:29:37,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:29:37,299 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:29:37,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874504147] [2023-11-29 01:29:37,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:29:37,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:29:37,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:29:37,301 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:29:37,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:30:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:30:09,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 4079 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 01:30:09,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:30:09,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:30:09,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:30:09,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:30:09,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:30:09,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:30:10,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:30:10,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:30:10,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:30:10,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:30:10,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-29 01:30:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 1731 proven. 1328 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-11-29 01:30:10,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:30:11,409 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:30:11,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2023-11-29 01:30:35,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:30:35,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694560788] [2023-11-29 01:30:35,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:30:35,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874504147] [2023-11-29 01:30:35,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874504147] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:30:35,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:30:35,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-29 01:30:35,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948796866] [2023-11-29 01:30:35,358 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:30:35,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:30:35,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:30:35,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:30:35,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 01:30:35,361 INFO L87 Difference]: Start difference. First operand 2727 states and 3713 transitions. Second operand has 19 states, 19 states have (on average 33.94736842105263) internal successors, (645), 18 states have internal predecessors, (645), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:30:38,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:30:40,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:30:49,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:30:51,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:30:51,225 INFO L93 Difference]: Finished difference Result 5280 states and 7243 transitions. [2023-11-29 01:30:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 01:30:51,226 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 33.94736842105263) internal successors, (645), 18 states have internal predecessors, (645), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 847 [2023-11-29 01:30:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:30:51,233 INFO L225 Difference]: With dead ends: 5280 [2023-11-29 01:30:51,233 INFO L226 Difference]: Without dead ends: 3970 [2023-11-29 01:30:51,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1633 GetRequests, 1590 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=306, Invalid=1416, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 01:30:51,236 INFO L413 NwaCegarLoop]: 1944 mSDtfsCounter, 1850 mSDsluCounter, 23291 mSDsCounter, 0 mSdLazyCounter, 7151 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1883 SdHoareTripleChecker+Valid, 25235 SdHoareTripleChecker+Invalid, 7162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 7151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:30:51,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1883 Valid, 25235 Invalid, 7162 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 7151 Invalid, 0 Unknown, 0 Unchecked, 15.3s Time] [2023-11-29 01:30:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2023-11-29 01:30:51,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 2727. [2023-11-29 01:30:51,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2678 states have (on average 1.352875280059746) internal successors, (3623), 2684 states have internal predecessors, (3623), 44 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-29 01:30:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3711 transitions. [2023-11-29 01:30:51,347 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3711 transitions. Word has length 847 [2023-11-29 01:30:51,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:30:51,348 INFO L495 AbstractCegarLoop]: Abstraction has 2727 states and 3711 transitions. [2023-11-29 01:30:51,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 33.94736842105263) internal successors, (645), 18 states have internal predecessors, (645), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:30:51,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3711 transitions. [2023-11-29 01:30:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2023-11-29 01:30:51,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:30:51,361 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:30:51,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:30:51,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:30:51,562 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:30:51,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:30:51,563 INFO L85 PathProgramCache]: Analyzing trace with hash -344534540, now seen corresponding path program 2 times [2023-11-29 01:30:51,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:30:51,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071792290] [2023-11-29 01:30:51,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:30:51,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:30:51,792 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:30:51,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837361220] [2023-11-29 01:30:51,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:30:51,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:30:51,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:30:51,793 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:30:51,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:30:53,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:30:53,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:30:53,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 01:30:53,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:30:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3426 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3426 trivial. 0 not checked. [2023-11-29 01:30:53,144 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:30:53,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:30:53,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071792290] [2023-11-29 01:30:53,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:30:53,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837361220] [2023-11-29 01:30:53,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837361220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:30:53,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:30:53,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 01:30:53,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054401762] [2023-11-29 01:30:53,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:30:53,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:30:53,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:30:53,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:30:53,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:30:53,147 INFO L87 Difference]: Start difference. First operand 2727 states and 3711 transitions. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:30:53,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:30:53,349 INFO L93 Difference]: Finished difference Result 3096 states and 4227 transitions. [2023-11-29 01:30:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:30:53,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 848 [2023-11-29 01:30:53,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:30:53,354 INFO L225 Difference]: With dead ends: 3096 [2023-11-29 01:30:53,354 INFO L226 Difference]: Without dead ends: 2757 [2023-11-29 01:30:53,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 841 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:30:53,356 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 23 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:30:53,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 1406 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:30:53,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2023-11-29 01:30:53,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2748. [2023-11-29 01:30:53,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2699 states have (on average 1.351241200444609) internal successors, (3647), 2705 states have internal predecessors, (3647), 44 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-29 01:30:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 3735 transitions. [2023-11-29 01:30:53,406 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 3735 transitions. Word has length 848 [2023-11-29 01:30:53,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:30:53,407 INFO L495 AbstractCegarLoop]: Abstraction has 2748 states and 3735 transitions. [2023-11-29 01:30:53,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:30:53,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 3735 transitions. [2023-11-29 01:30:53,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 850 [2023-11-29 01:30:53,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:30:53,418 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:30:53,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 01:30:53,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:30:53,618 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:30:53,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:30:53,619 INFO L85 PathProgramCache]: Analyzing trace with hash 200528602, now seen corresponding path program 1 times [2023-11-29 01:30:53,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:30:53,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272910069] [2023-11-29 01:30:53,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:30:53,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:30:53,871 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:30:53,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414609765] [2023-11-29 01:30:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:30:53,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:30:53,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:30:53,873 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:30:53,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:31:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:18,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 4081 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 01:31:18,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:18,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:31:18,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:18,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:31:18,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:31:19,240 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:19,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-29 01:31:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3426 backedges. 1371 proven. 140 refuted. 0 times theorem prover too weak. 1915 trivial. 0 not checked. [2023-11-29 01:31:19,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:20,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:31:20,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2023-11-29 01:31:26,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:26,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272910069] [2023-11-29 01:31:26,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:31:26,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414609765] [2023-11-29 01:31:26,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414609765] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:26,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:31:26,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-29 01:31:26,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172679361] [2023-11-29 01:31:26,202 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:26,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:31:26,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:31:26,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2023-11-29 01:31:26,204 INFO L87 Difference]: Start difference. First operand 2748 states and 3735 transitions. Second operand has 16 states, 16 states have (on average 21.4375) internal successors, (343), 15 states have internal predecessors, (343), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:31:32,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:31:32,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:32,487 INFO L93 Difference]: Finished difference Result 5719 states and 7799 transitions. [2023-11-29 01:31:32,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:31:32,487 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.4375) internal successors, (343), 15 states have internal predecessors, (343), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 849 [2023-11-29 01:31:32,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:32,495 INFO L225 Difference]: With dead ends: 5719 [2023-11-29 01:31:32,495 INFO L226 Difference]: Without dead ends: 3360 [2023-11-29 01:31:32,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1637 GetRequests, 1601 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:31:32,499 INFO L413 NwaCegarLoop]: 825 mSDtfsCounter, 1153 mSDsluCounter, 7148 mSDsCounter, 0 mSdLazyCounter, 3076 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 7973 SdHoareTripleChecker+Invalid, 3088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:32,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1166 Valid, 7973 Invalid, 3088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3076 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-11-29 01:31:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2023-11-29 01:31:32,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2748. [2023-11-29 01:31:32,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2699 states have (on average 1.3505001852537977) internal successors, (3645), 2705 states have internal predecessors, (3645), 44 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-29 01:31:32,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 3733 transitions. [2023-11-29 01:31:32,579 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 3733 transitions. Word has length 849 [2023-11-29 01:31:32,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:32,580 INFO L495 AbstractCegarLoop]: Abstraction has 2748 states and 3733 transitions. [2023-11-29 01:31:32,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.4375) internal successors, (343), 15 states have internal predecessors, (343), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:31:32,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 3733 transitions. [2023-11-29 01:31:32,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 851 [2023-11-29 01:31:32,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:32,619 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:32,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:31:32,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:31:32,820 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:32,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:32,821 INFO L85 PathProgramCache]: Analyzing trace with hash 812836207, now seen corresponding path program 2 times [2023-11-29 01:31:32,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:32,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448154532] [2023-11-29 01:31:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:32,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:33,025 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:31:33,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003440080] [2023-11-29 01:31:33,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:31:33,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:33,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:33,027 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:33,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:31:34,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:31:34,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:31:34,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:31:34,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3428 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3428 trivial. 0 not checked. [2023-11-29 01:31:34,702 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:31:34,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:34,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448154532] [2023-11-29 01:31:34,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:31:34,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003440080] [2023-11-29 01:31:34,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003440080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:31:34,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:31:34,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 01:31:34,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614935178] [2023-11-29 01:31:34,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:31:34,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:31:34,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:34,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:31:34,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:31:34,705 INFO L87 Difference]: Start difference. First operand 2748 states and 3733 transitions. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:31:35,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:35,062 INFO L93 Difference]: Finished difference Result 3141 states and 4279 transitions. [2023-11-29 01:31:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:31:35,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 850 [2023-11-29 01:31:35,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:35,067 INFO L225 Difference]: With dead ends: 3141 [2023-11-29 01:31:35,067 INFO L226 Difference]: Without dead ends: 2781 [2023-11-29 01:31:35,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 842 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:31:35,069 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 28 mSDsluCounter, 1643 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 2009 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:35,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 2009 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:31:35,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2023-11-29 01:31:35,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2772. [2023-11-29 01:31:35,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2772 states, 2723 states have (on average 1.3518178479618068) internal successors, (3681), 2729 states have internal predecessors, (3681), 44 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-29 01:31:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 3769 transitions. [2023-11-29 01:31:35,141 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 3769 transitions. Word has length 850 [2023-11-29 01:31:35,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:35,142 INFO L495 AbstractCegarLoop]: Abstraction has 2772 states and 3769 transitions. [2023-11-29 01:31:35,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:31:35,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 3769 transitions. [2023-11-29 01:31:35,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2023-11-29 01:31:35,153 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:35,153 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:35,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:31:35,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:31:35,354 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:35,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:35,354 INFO L85 PathProgramCache]: Analyzing trace with hash 641540164, now seen corresponding path program 1 times [2023-11-29 01:31:35,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:35,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353295554] [2023-11-29 01:31:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:35,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:35,603 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:31:35,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582972912] [2023-11-29 01:31:35,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:35,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:35,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:35,604 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:35,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:31:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:37,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 4083 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:31:37,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3428 backedges. 1399 proven. 27 refuted. 0 times theorem prover too weak. 2002 trivial. 0 not checked. [2023-11-29 01:31:37,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3428 backedges. 1425 proven. 0 refuted. 0 times theorem prover too weak. 2003 trivial. 0 not checked. [2023-11-29 01:31:37,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:37,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353295554] [2023-11-29 01:31:37,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:31:37,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582972912] [2023-11-29 01:31:37,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582972912] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:31:37,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:31:37,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2023-11-29 01:31:37,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240891847] [2023-11-29 01:31:37,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:31:37,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:31:37,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:37,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:31:37,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:31:37,976 INFO L87 Difference]: Start difference. First operand 2772 states and 3769 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:31:38,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:38,693 INFO L93 Difference]: Finished difference Result 5547 states and 7556 transitions. [2023-11-29 01:31:38,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:31:38,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 851 [2023-11-29 01:31:38,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:38,699 INFO L225 Difference]: With dead ends: 5547 [2023-11-29 01:31:38,700 INFO L226 Difference]: Without dead ends: 2811 [2023-11-29 01:31:38,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1702 GetRequests, 1693 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:31:38,704 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 40 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1712 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:38,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1712 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:31:38,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2023-11-29 01:31:38,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2772. [2023-11-29 01:31:38,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2772 states, 2723 states have (on average 1.3452074917370547) internal successors, (3663), 2729 states have internal predecessors, (3663), 44 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-29 01:31:38,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 3751 transitions. [2023-11-29 01:31:38,789 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 3751 transitions. Word has length 851 [2023-11-29 01:31:38,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:38,789 INFO L495 AbstractCegarLoop]: Abstraction has 2772 states and 3751 transitions. [2023-11-29 01:31:38,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:31:38,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 3751 transitions. [2023-11-29 01:31:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 855 [2023-11-29 01:31:38,800 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:38,801 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:38,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 01:31:39,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:39,002 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:39,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:39,002 INFO L85 PathProgramCache]: Analyzing trace with hash 740622660, now seen corresponding path program 1 times [2023-11-29 01:31:39,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:39,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465790791] [2023-11-29 01:31:39,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:39,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:39,309 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:31:39,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969438453] [2023-11-29 01:31:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:39,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:39,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:39,310 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:39,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:32:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:31,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 4080 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 01:32:31,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:31,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:32:31,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:32:31,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:32:31,650 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:32:31,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-29 01:32:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3431 backedges. 901 proven. 33 refuted. 0 times theorem prover too weak. 2497 trivial. 0 not checked. [2023-11-29 01:32:31,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:32:32,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:32:32,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2023-11-29 01:32:33,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:33,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465790791] [2023-11-29 01:32:33,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:33,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969438453] [2023-11-29 01:32:33,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969438453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:32:33,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:32:33,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-29 01:32:33,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860254510] [2023-11-29 01:32:33,677 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:32:33,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:32:33,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:33,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:32:33,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:32:33,679 INFO L87 Difference]: Start difference. First operand 2772 states and 3751 transitions. Second operand has 15 states, 15 states have (on average 17.933333333333334) internal successors, (269), 14 states have internal predecessors, (269), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:32:37,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:37,266 INFO L93 Difference]: Finished difference Result 5647 states and 7657 transitions. [2023-11-29 01:32:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:32:37,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 17.933333333333334) internal successors, (269), 14 states have internal predecessors, (269), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 854 [2023-11-29 01:32:37,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:37,272 INFO L225 Difference]: With dead ends: 5647 [2023-11-29 01:32:37,272 INFO L226 Difference]: Without dead ends: 3046 [2023-11-29 01:32:37,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1647 GetRequests, 1613 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 01:32:37,275 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 864 mSDsluCounter, 3808 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 4289 SdHoareTripleChecker+Invalid, 2019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:37,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 4289 Invalid, 2019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-29 01:32:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2023-11-29 01:32:37,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2772. [2023-11-29 01:32:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2772 states, 2723 states have (on average 1.3448402497245684) internal successors, (3662), 2729 states have internal predecessors, (3662), 44 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-29 01:32:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 3750 transitions. [2023-11-29 01:32:37,333 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 3750 transitions. Word has length 854 [2023-11-29 01:32:37,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:37,333 INFO L495 AbstractCegarLoop]: Abstraction has 2772 states and 3750 transitions. [2023-11-29 01:32:37,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.933333333333334) internal successors, (269), 14 states have internal predecessors, (269), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:32:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 3750 transitions. [2023-11-29 01:32:37,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2023-11-29 01:32:37,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:37,342 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:32:37,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 01:32:37,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:37,543 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:37,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:37,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1623017923, now seen corresponding path program 2 times [2023-11-29 01:32:37,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:37,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541901155] [2023-11-29 01:32:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:37,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:37,870 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:37,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350557519] [2023-11-29 01:32:37,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:32:37,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:37,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:37,871 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:37,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:32:39,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:32:39,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:32:39,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:32:39,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3437 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3437 trivial. 0 not checked. [2023-11-29 01:32:39,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:39,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:39,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541901155] [2023-11-29 01:32:39,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:39,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350557519] [2023-11-29 01:32:39,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350557519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:39,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:39,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:32:39,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835545328] [2023-11-29 01:32:39,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:39,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:32:39,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:39,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:32:39,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:32:39,617 INFO L87 Difference]: Start difference. First operand 2772 states and 3750 transitions. Second operand has 6 states, 6 states have (on average 27.166666666666668) internal successors, (163), 6 states have internal predecessors, (163), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:32:39,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:39,844 INFO L93 Difference]: Finished difference Result 3171 states and 4302 transitions. [2023-11-29 01:32:39,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:32:39,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.166666666666668) internal successors, (163), 6 states have internal predecessors, (163), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 856 [2023-11-29 01:32:39,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:39,849 INFO L225 Difference]: With dead ends: 3171 [2023-11-29 01:32:39,849 INFO L226 Difference]: Without dead ends: 2787 [2023-11-29 01:32:39,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 855 GetRequests, 851 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:32:39,851 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 6 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:39,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1351 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:32:39,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2023-11-29 01:32:39,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2784. [2023-11-29 01:32:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2735 states have (on average 1.3444241316270567) internal successors, (3677), 2741 states have internal predecessors, (3677), 44 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-29 01:32:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 3765 transitions. [2023-11-29 01:32:39,927 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 3765 transitions. Word has length 856 [2023-11-29 01:32:39,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:39,928 INFO L495 AbstractCegarLoop]: Abstraction has 2784 states and 3765 transitions. [2023-11-29 01:32:39,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.166666666666668) internal successors, (163), 6 states have internal predecessors, (163), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:32:39,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 3765 transitions. [2023-11-29 01:32:39,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2023-11-29 01:32:39,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:39,936 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:32:39,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:32:40,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:40,137 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:40,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:40,137 INFO L85 PathProgramCache]: Analyzing trace with hash 826582207, now seen corresponding path program 1 times [2023-11-29 01:32:40,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:40,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608839919] [2023-11-29 01:32:40,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:40,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:40,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:40,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006280989] [2023-11-29 01:32:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:40,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:40,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:40,405 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:40,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:33:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:23,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 4078 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 01:33:23,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:23,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:33:23,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:33:23,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:33:23,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:33:23,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:33:23,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:33:23,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-29 01:33:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3437 backedges. 1697 proven. 325 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2023-11-29 01:33:23,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:33:24,630 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:33:24,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2023-11-29 01:33:36,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:36,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608839919] [2023-11-29 01:33:36,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:36,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006280989] [2023-11-29 01:33:36,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006280989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:33:36,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:33:36,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-29 01:33:36,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140439165] [2023-11-29 01:33:36,042 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:33:36,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:33:36,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:36,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:33:36,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:33:36,045 INFO L87 Difference]: Start difference. First operand 2784 states and 3765 transitions. Second operand has 18 states, 18 states have (on average 23.61111111111111) internal successors, (425), 17 states have internal predecessors, (425), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:33:44,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:44,368 INFO L93 Difference]: Finished difference Result 5594 states and 7603 transitions. [2023-11-29 01:33:44,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 01:33:44,369 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 23.61111111111111) internal successors, (425), 17 states have internal predecessors, (425), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 856 [2023-11-29 01:33:44,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:44,373 INFO L225 Difference]: With dead ends: 5594 [2023-11-29 01:33:44,373 INFO L226 Difference]: Without dead ends: 3456 [2023-11-29 01:33:44,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1651 GetRequests, 1612 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=249, Invalid=1157, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 01:33:44,376 INFO L413 NwaCegarLoop]: 971 mSDtfsCounter, 1403 mSDsluCounter, 9857 mSDsCounter, 0 mSdLazyCounter, 4314 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1419 SdHoareTripleChecker+Valid, 10828 SdHoareTripleChecker+Invalid, 4325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 4314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:44,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1419 Valid, 10828 Invalid, 4325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 4314 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2023-11-29 01:33:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3456 states. [2023-11-29 01:33:44,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3456 to 2784. [2023-11-29 01:33:44,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2735 states have (on average 1.3436928702010968) internal successors, (3675), 2741 states have internal predecessors, (3675), 44 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-29 01:33:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 3763 transitions. [2023-11-29 01:33:44,435 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 3763 transitions. Word has length 856 [2023-11-29 01:33:44,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:44,436 INFO L495 AbstractCegarLoop]: Abstraction has 2784 states and 3763 transitions. [2023-11-29 01:33:44,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 23.61111111111111) internal successors, (425), 17 states have internal predecessors, (425), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:33:44,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 3763 transitions. [2023-11-29 01:33:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859 [2023-11-29 01:33:44,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:44,445 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:33:44,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:33:44,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:44,645 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:44,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:44,646 INFO L85 PathProgramCache]: Analyzing trace with hash -570140040, now seen corresponding path program 2 times [2023-11-29 01:33:44,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:44,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009727879] [2023-11-29 01:33:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:44,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:44,959 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:44,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420149506] [2023-11-29 01:33:44,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:33:44,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:44,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:44,961 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:44,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00010350-870d-4089-9b36-a6020d2bb8df/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:33:47,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:33:47,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:33:47,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 01:33:47,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:23,215 WARN L293 SmtUtils]: Spent 20.12s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:35:10,479 WARN L293 SmtUtils]: Spent 30.81s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:35:18,569 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~_hf_hashv~0#1| 4294967296))) (and (= (div .cse0 4096) |c_ULTIMATE.start_main_~_hj_i~1#1|) (let ((.cse2 (* 256 .cse0)) (.cse1 (* 4294967295 |c_ULTIMATE.start_main_~_hf_hashv~0#1|))) (or (exists ((v_z_76 Int)) (and (<= (+ v_z_76 .cse0) 4294967295) (<= (mod (+ (* v_z_76 4294967294) .cse1 4276993779) 4294967296) 0) (<= 0 v_z_76) (exists ((v_y_76 Int)) (= (+ .cse2 (* v_z_76 255)) (* v_y_76 4294967296))))) (exists ((v_z_76 Int)) (and (<= 4294967296 (+ v_z_76 .cse0)) (exists ((v_y_76 Int)) (= (+ 1099511627776 (* v_y_76 4294967296)) (+ .cse2 (* v_z_76 255)))) (<= (mod (+ (* v_z_76 4294967294) .cse1 4276993779) 4294967296) 0) (<= v_z_76 4294967295))))))) is different from false [2023-11-29 01:35:26,742 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~_hf_hashv~0#1| 4294967296))) (and (= (div .cse0 4096) |c_ULTIMATE.start_main_~_hj_i~1#1|) (let ((.cse2 (* 256 .cse0)) (.cse1 (* 4294967295 |c_ULTIMATE.start_main_~_hf_hashv~0#1|))) (or (exists ((v_z_76 Int)) (and (<= (+ v_z_76 .cse0) 4294967295) (<= (mod (+ (* v_z_76 4294967294) .cse1 4276993779) 4294967296) 0) (<= 0 v_z_76) (exists ((v_y_76 Int)) (= (+ .cse2 (* v_z_76 255)) (* v_y_76 4294967296))))) (exists ((v_z_76 Int)) (and (<= 4294967296 (+ v_z_76 .cse0)) (exists ((v_y_76 Int)) (= (+ 1099511627776 (* v_y_76 4294967296)) (+ .cse2 (* v_z_76 255)))) (<= (mod (+ (* v_z_76 4294967294) .cse1 4276993779) 4294967296) 0) (<= v_z_76 4294967295))))) (= (* (mod |c_ULTIMATE.start_main_~_hj_i~1#1| 4294967296) 65536) |c_ULTIMATE.start_main_#t~nondet204#1|))) is different from false [2023-11-29 01:35:34,842 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:35:42,860 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:35:51,873 WARN L293 SmtUtils]: Spent 9.01s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:36:01,251 WARN L293 SmtUtils]: Spent 9.38s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:36:17,977 WARN L293 SmtUtils]: Spent 8.27s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:36:26,001 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:36:34,029 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:36:42,060 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:36:50,107 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:36:58,165 WARN L293 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:37:06,211 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:37:14,399 WARN L293 SmtUtils]: Spent 8.19s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:37:22,449 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:37:30,471 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:37:38,504 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:37:54,804 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:38:02,836 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:38:10,895 WARN L293 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:38:18,921 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:38:31,087 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:38:39,129 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:38:47,157 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:38:55,178 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:39:03,236 WARN L293 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:39:11,278 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:39:19,309 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:39:27,338 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:39:35,376 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:39:47,507 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:39:55,533 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:40:03,611 WARN L293 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:40:12,284 WARN L293 SmtUtils]: Spent 8.67s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:40:20,347 WARN L293 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:40:27,251 WARN L293 SmtUtils]: Spent 6.90s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:40:35,273 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:40:43,300 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:40:51,355 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:40:59,585 WARN L293 SmtUtils]: Spent 8.23s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:41:07,638 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:41:15,669 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:41:23,692 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:41:31,717 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:41:39,758 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:41:47,779 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:42:00,075 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:42:08,112 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:42:16,157 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:42:24,191 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:42:32,217 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)