./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/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_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/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_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/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 94599b38b669e42115f92cee257d9ed4ed5d4777dca7d2ee690bacb4e0d226f0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:24:40,896 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:24:40,958 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:24:40,963 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:24:40,964 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:24:40,985 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:24:40,986 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:24:40,986 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:24:40,987 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:24:40,987 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:24:40,988 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:24:40,988 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:24:40,989 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:24:40,989 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:24:40,990 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:24:40,991 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:24:40,991 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:24:40,992 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:24:40,992 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:24:40,993 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:24:40,993 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:24:40,994 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:24:40,994 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:24:40,995 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:24:40,995 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:24:40,996 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:24:40,996 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:24:40,996 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:24:40,997 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:24:40,997 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:24:40,997 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:24:40,998 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:24:40,998 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:24:40,998 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:24:40,999 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:24:40,999 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:24:40,999 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:24:40,999 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:24:40,999 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:24:41,000 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:24:41,000 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:24:41,000 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:24:41,000 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_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94599b38b669e42115f92cee257d9ed4ed5d4777dca7d2ee690bacb4e0d226f0 [2023-11-28 20:24:41,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:24:41,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:24:41,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:24:41,234 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:24:41,234 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:24:41,235 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i [2023-11-28 20:24:43,912 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:24:44,176 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:24:44,177 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i [2023-11-28 20:24:44,196 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/data/bdb972603/aa3f018d5819490a87119b756e17bcc7/FLAGdce10adfa [2023-11-28 20:24:44,210 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/data/bdb972603/aa3f018d5819490a87119b756e17bcc7 [2023-11-28 20:24:44,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:24:44,213 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:24:44,214 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:24:44,215 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:24:44,219 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:24:44,220 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:24:44" (1/1) ... [2023-11-28 20:24:44,221 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bf228a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:44, skipping insertion in model container [2023-11-28 20:24:44,221 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:24:44" (1/1) ... [2023-11-28 20:24:44,298 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:24:44,656 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_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[33021,33034] [2023-11-28 20:24:44,782 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_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[49681,49694] [2023-11-28 20:24:44,809 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:24:44,820 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:24:44,853 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_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[33021,33034] [2023-11-28 20:24:44,923 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_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[49681,49694] [2023-11-28 20:24:44,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:24:44,963 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:24:44,969 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:24:44,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:44 WrapperNode [2023-11-28 20:24:44,969 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:24:44,970 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:24:44,970 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:24:44,971 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:24:44,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:44" (1/1) ... [2023-11-28 20:24:45,020 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:44" (1/1) ... [2023-11-28 20:24:45,105 INFO L138 Inliner]: procedures = 177, calls = 487, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2208 [2023-11-28 20:24:45,106 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:24:45,106 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:24:45,106 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:24:45,106 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:24:45,115 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:44" (1/1) ... [2023-11-28 20:24:45,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:44" (1/1) ... [2023-11-28 20:24:45,125 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:44" (1/1) ... [2023-11-28 20:24:45,339 INFO L175 MemorySlicer]: Split 453 memory accesses to 5 slices as follows [2, 24, 417, 5, 5]. 92 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 101 writes are split as follows [0, 1, 98, 1, 1]. [2023-11-28 20:24:45,340 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:44" (1/1) ... [2023-11-28 20:24:45,340 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:44" (1/1) ... [2023-11-28 20:24:45,385 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:44" (1/1) ... [2023-11-28 20:24:45,403 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:44" (1/1) ... [2023-11-28 20:24:45,410 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:44" (1/1) ... [2023-11-28 20:24:45,419 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:44" (1/1) ... [2023-11-28 20:24:45,432 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:24:45,433 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:24:45,433 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:24:45,433 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:24:45,434 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:44" (1/1) ... [2023-11-28 20:24:45,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:24:45,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:45,467 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:24:45,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:24:45,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:24:45,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:24:45,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 20:24:45,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-28 20:24:45,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-28 20:24:45,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-28 20:24:45,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-28 20:24:45,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:24:45,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:24:45,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 20:24:45,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-28 20:24:45,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-28 20:24:45,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-28 20:24:45,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-28 20:24:45,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-28 20:24:45,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-28 20:24:45,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#4 [2023-11-28 20:24:45,502 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-28 20:24:45,502 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-28 20:24:45,502 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-28 20:24:45,502 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-28 20:24:45,502 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#4 [2023-11-28 20:24:45,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-28 20:24:45,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:24:45,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-28 20:24:45,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-28 20:24:45,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-28 20:24:45,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-28 20:24:45,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-28 20:24:45,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:24:45,503 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-28 20:24:45,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-28 20:24:45,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-28 20:24:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-28 20:24:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-28 20:24:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-28 20:24:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:24:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:24:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:24:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:24:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-28 20:24:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-28 20:24:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:24:45,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:24:45,751 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:24:45,754 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:24:48,776 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:24:48,832 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:24:48,832 INFO L309 CfgBuilder]: Removed 100 assume(true) statements. [2023-11-28 20:24:48,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:24:48 BoogieIcfgContainer [2023-11-28 20:24:48,833 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:24:48,835 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:24:48,835 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:24:48,838 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:24:48,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:24:44" (1/3) ... [2023-11-28 20:24:48,839 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae10b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:24:48, skipping insertion in model container [2023-11-28 20:24:48,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:44" (2/3) ... [2023-11-28 20:24:48,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae10b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:24:48, skipping insertion in model container [2023-11-28 20:24:48,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:24:48" (3/3) ... [2023-11-28 20:24:48,841 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test5-3.i [2023-11-28 20:24:48,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:24:48,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-28 20:24:48,922 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:24:48,929 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;@769e7a6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:24:48,929 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-28 20:24:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand has 560 states, 544 states have (on average 1.7077205882352942) internal successors, (929), 551 states have internal predecessors, (929), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-28 20:24:48,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-28 20:24:48,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:48,943 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:48,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:48,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:48,949 INFO L85 PathProgramCache]: Analyzing trace with hash 526469056, now seen corresponding path program 1 times [2023-11-28 20:24:48,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:48,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735614268] [2023-11-28 20:24:48,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:48,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:49,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:49,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735614268] [2023-11-28 20:24:49,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-28 20:24:49,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497804077] [2023-11-28 20:24:49,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:49,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:49,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:49,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:49,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:24:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:49,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-28 20:24:49,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:49,379 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:24:49,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497804077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:49,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:49,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:24:49,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909802584] [2023-11-28 20:24:49,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:49,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:24:49,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:49,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:24:49,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:24:49,413 INFO L87 Difference]: Start difference. First operand has 560 states, 544 states have (on average 1.7077205882352942) internal successors, (929), 551 states have internal predecessors, (929), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:49,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:49,498 INFO L93 Difference]: Finished difference Result 1119 states and 1906 transitions. [2023-11-28 20:24:49,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:24:49,501 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-28 20:24:49,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:49,518 INFO L225 Difference]: With dead ends: 1119 [2023-11-28 20:24:49,518 INFO L226 Difference]: Without dead ends: 499 [2023-11-28 20:24:49,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:24:49,527 INFO L413 NwaCegarLoop]: 837 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, 837 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 [2023-11-28 20:24:49,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 837 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:24:49,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-11-28 20:24:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2023-11-28 20:24:49,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 484 states have (on average 1.5206611570247934) internal successors, (736), 490 states have internal predecessors, (736), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-28 20:24:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 758 transitions. [2023-11-28 20:24:49,601 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 758 transitions. Word has length 7 [2023-11-28 20:24:49,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:49,601 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 758 transitions. [2023-11-28 20:24:49,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:49,602 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 758 transitions. [2023-11-28 20:24:49,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-28 20:24:49,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:49,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:49,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:24:49,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-28 20:24:49,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:49,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:49,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1332667573, now seen corresponding path program 1 times [2023-11-28 20:24:49,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:49,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922848239] [2023-11-28 20:24:49,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:49,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:49,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:49,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922848239] [2023-11-28 20:24:49,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-28 20:24:49,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462447274] [2023-11-28 20:24:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:49,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:49,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:49,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:49,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:24:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:50,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 20:24:50,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:50,163 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:24:50,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462447274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:50,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:50,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:24:50,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511347875] [2023-11-28 20:24:50,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:50,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:24:50,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:50,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:24:50,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:24:50,166 INFO L87 Difference]: Start difference. First operand 499 states and 758 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:50,237 INFO L93 Difference]: Finished difference Result 1142 states and 1745 transitions. [2023-11-28 20:24:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:24:50,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-28 20:24:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:50,245 INFO L225 Difference]: With dead ends: 1142 [2023-11-28 20:24:50,245 INFO L226 Difference]: Without dead ends: 987 [2023-11-28 20:24:50,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:24:50,248 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 723 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:50,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1586 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:24:50,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2023-11-28 20:24:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 500. [2023-11-28 20:24:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 485 states have (on average 1.5195876288659793) internal successors, (737), 491 states have internal predecessors, (737), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-28 20:24:50,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 759 transitions. [2023-11-28 20:24:50,280 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 759 transitions. Word has length 61 [2023-11-28 20:24:50,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:50,280 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 759 transitions. [2023-11-28 20:24:50,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:50,280 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 759 transitions. [2023-11-28 20:24:50,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-28 20:24:50,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:50,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:50,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:24:50,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:50,493 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:50,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:50,493 INFO L85 PathProgramCache]: Analyzing trace with hash 420334830, now seen corresponding path program 1 times [2023-11-28 20:24:50,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:50,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306963030] [2023-11-28 20:24:50,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:50,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:50,632 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:24:50,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537040004] [2023-11-28 20:24:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:50,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:50,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:50,636 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:50,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:24:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:51,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:24:51,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:51,158 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:24:51,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:51,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306963030] [2023-11-28 20:24:51,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:24:51,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537040004] [2023-11-28 20:24:51,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537040004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:51,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:51,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:24:51,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726080994] [2023-11-28 20:24:51,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:51,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:24:51,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:51,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:24:51,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:24:51,162 INFO L87 Difference]: Start difference. First operand 500 states and 759 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-28 20:24:51,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:51,287 INFO L93 Difference]: Finished difference Result 1019 states and 1547 transitions. [2023-11-28 20:24:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:24:51,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 207 [2023-11-28 20:24:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:51,292 INFO L225 Difference]: With dead ends: 1019 [2023-11-28 20:24:51,292 INFO L226 Difference]: Without dead ends: 521 [2023-11-28 20:24:51,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:24:51,294 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 9 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1456 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 [2023-11-28 20:24:51,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1456 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:24:51,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2023-11-28 20:24:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 520. [2023-11-28 20:24:51,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 505 states have (on average 1.499009900990099) internal successors, (757), 511 states have internal predecessors, (757), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-28 20:24:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 779 transitions. [2023-11-28 20:24:51,313 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 779 transitions. Word has length 207 [2023-11-28 20:24:51,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:51,313 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 779 transitions. [2023-11-28 20:24:51,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-28 20:24:51,314 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 779 transitions. [2023-11-28 20:24:51,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-28 20:24:51,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:51,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:51,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:24:51,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:51,525 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:51,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:51,525 INFO L85 PathProgramCache]: Analyzing trace with hash -66738896, now seen corresponding path program 1 times [2023-11-28 20:24:51,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:51,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423694642] [2023-11-28 20:24:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:51,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:51,618 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:24:51,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409362137] [2023-11-28 20:24:51,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:51,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:51,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:51,619 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:51,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:24:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:52,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:24:52,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:52,121 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:24:52,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:52,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423694642] [2023-11-28 20:24:52,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:24:52,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409362137] [2023-11-28 20:24:52,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409362137] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:52,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:52,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:24:52,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419503465] [2023-11-28 20:24:52,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:52,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:24:52,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:52,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:24:52,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:24:52,125 INFO L87 Difference]: Start difference. First operand 520 states and 779 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-28 20:24:52,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:52,220 INFO L93 Difference]: Finished difference Result 1059 states and 1587 transitions. [2023-11-28 20:24:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:24:52,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 207 [2023-11-28 20:24:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:52,228 INFO L225 Difference]: With dead ends: 1059 [2023-11-28 20:24:52,229 INFO L226 Difference]: Without dead ends: 541 [2023-11-28 20:24:52,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:24:52,231 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 9 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1456 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 [2023-11-28 20:24:52,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1456 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:24:52,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2023-11-28 20:24:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 540. [2023-11-28 20:24:52,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 525 states have (on average 1.48) internal successors, (777), 531 states have internal predecessors, (777), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-28 20:24:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 799 transitions. [2023-11-28 20:24:52,250 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 799 transitions. Word has length 207 [2023-11-28 20:24:52,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:52,251 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 799 transitions. [2023-11-28 20:24:52,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-28 20:24:52,251 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 799 transitions. [2023-11-28 20:24:52,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-28 20:24:52,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:52,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:52,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:24:52,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:52,457 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:52,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:52,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1580624046, now seen corresponding path program 1 times [2023-11-28 20:24:52,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:52,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271701153] [2023-11-28 20:24:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:52,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:52,530 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:24:52,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [215837272] [2023-11-28 20:24:52,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:52,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:52,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:52,531 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:52,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:24:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:53,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:24:53,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:24:53,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:24:53,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:53,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271701153] [2023-11-28 20:24:53,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:24:53,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215837272] [2023-11-28 20:24:53,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215837272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:53,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:53,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:24:53,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942778293] [2023-11-28 20:24:53,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:53,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:24:53,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:53,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:24:53,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:24:53,065 INFO L87 Difference]: Start difference. First operand 540 states and 799 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-28 20:24:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:53,158 INFO L93 Difference]: Finished difference Result 715 states and 1068 transitions. [2023-11-28 20:24:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:24:53,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 207 [2023-11-28 20:24:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:53,164 INFO L225 Difference]: With dead ends: 715 [2023-11-28 20:24:53,164 INFO L226 Difference]: Without dead ends: 561 [2023-11-28 20:24:53,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:24:53,166 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 9 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1456 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 [2023-11-28 20:24:53,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1456 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:24:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2023-11-28 20:24:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 560. [2023-11-28 20:24:53,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 545 states have (on average 1.4623853211009175) internal successors, (797), 551 states have internal predecessors, (797), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-28 20:24:53,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 819 transitions. [2023-11-28 20:24:53,188 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 819 transitions. Word has length 207 [2023-11-28 20:24:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:53,189 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 819 transitions. [2023-11-28 20:24:53,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-28 20:24:53,189 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 819 transitions. [2023-11-28 20:24:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-28 20:24:53,193 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:53,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:53,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:24:53,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:53,394 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:53,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:53,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1885445298, now seen corresponding path program 1 times [2023-11-28 20:24:53,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:53,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555014435] [2023-11-28 20:24:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:53,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:53,477 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:24:53,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510558987] [2023-11-28 20:24:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:53,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:53,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:53,479 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:53,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:24:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:53,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:24:53,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:54,003 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:24:54,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:54,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555014435] [2023-11-28 20:24:54,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:24:54,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510558987] [2023-11-28 20:24:54,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510558987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:54,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:54,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:24:54,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596834151] [2023-11-28 20:24:54,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:54,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:24:54,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:54,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:24:54,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:24:54,006 INFO L87 Difference]: Start difference. First operand 560 states and 819 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2023-11-28 20:24:54,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:54,118 INFO L93 Difference]: Finished difference Result 1105 states and 1623 transitions. [2023-11-28 20:24:54,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:24:54,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 207 [2023-11-28 20:24:54,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:54,121 INFO L225 Difference]: With dead ends: 1105 [2023-11-28 20:24:54,122 INFO L226 Difference]: Without dead ends: 547 [2023-11-28 20:24:54,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:24:54,123 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 165 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 2032 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 [2023-11-28 20:24:54,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 2032 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:24:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-11-28 20:24:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 546. [2023-11-28 20:24:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 531 states have (on average 1.4613935969868173) internal successors, (776), 537 states have internal predecessors, (776), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-28 20:24:54,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 798 transitions. [2023-11-28 20:24:54,137 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 798 transitions. Word has length 207 [2023-11-28 20:24:54,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:54,138 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 798 transitions. [2023-11-28 20:24:54,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2023-11-28 20:24:54,138 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 798 transitions. [2023-11-28 20:24:54,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-28 20:24:54,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:54,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:54,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:24:54,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:54,343 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:54,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:54,343 INFO L85 PathProgramCache]: Analyzing trace with hash -127339804, now seen corresponding path program 1 times [2023-11-28 20:24:54,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:54,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308502747] [2023-11-28 20:24:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:54,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:54,416 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:24:54,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576739941] [2023-11-28 20:24:54,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:54,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:54,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:54,418 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:54,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:24:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:54,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:24:54,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:54,910 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:24:54,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:54,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308502747] [2023-11-28 20:24:54,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:24:54,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576739941] [2023-11-28 20:24:54,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576739941] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:54,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:54,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:24:54,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532198016] [2023-11-28 20:24:54,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:54,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:24:54,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:54,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:24:54,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:24:54,913 INFO L87 Difference]: Start difference. First operand 546 states and 798 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2023-11-28 20:24:55,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:55,008 INFO L93 Difference]: Finished difference Result 1077 states and 1581 transitions. [2023-11-28 20:24:55,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:24:55,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 207 [2023-11-28 20:24:55,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:55,012 INFO L225 Difference]: With dead ends: 1077 [2023-11-28 20:24:55,013 INFO L226 Difference]: Without dead ends: 533 [2023-11-28 20:24:55,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:24:55,014 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 165 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 2011 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 [2023-11-28 20:24:55,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 2011 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:24:55,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-11-28 20:24:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 532. [2023-11-28 20:24:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 517 states have (on average 1.460348162475822) internal successors, (755), 523 states have internal predecessors, (755), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-28 20:24:55,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 777 transitions. [2023-11-28 20:24:55,032 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 777 transitions. Word has length 207 [2023-11-28 20:24:55,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:55,032 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 777 transitions. [2023-11-28 20:24:55,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2023-11-28 20:24:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 777 transitions. [2023-11-28 20:24:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-28 20:24:55,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:55,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:55,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:24:55,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-28 20:24:55,237 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:55,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:55,237 INFO L85 PathProgramCache]: Analyzing trace with hash -993804046, now seen corresponding path program 1 times [2023-11-28 20:24:55,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:55,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130636968] [2023-11-28 20:24:55,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:55,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:55,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:24:55,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999637699] [2023-11-28 20:24:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:55,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:55,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:55,316 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:55,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:24:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:55,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:24:55,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:24:55,817 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:24:55,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:55,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130636968] [2023-11-28 20:24:55,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:24:55,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999637699] [2023-11-28 20:24:55,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999637699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:55,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:55,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:24:55,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060997283] [2023-11-28 20:24:55,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:55,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:24:55,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:55,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:24:55,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:24:55,820 INFO L87 Difference]: Start difference. First operand 532 states and 777 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2023-11-28 20:24:55,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:55,913 INFO L93 Difference]: Finished difference Result 693 states and 1022 transitions. [2023-11-28 20:24:55,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:24:55,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 207 [2023-11-28 20:24:55,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:55,918 INFO L225 Difference]: With dead ends: 693 [2023-11-28 20:24:55,918 INFO L226 Difference]: Without dead ends: 519 [2023-11-28 20:24:55,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:24:55,919 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 165 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1990 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 [2023-11-28 20:24:55,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1990 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:24:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-11-28 20:24:55,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 518. [2023-11-28 20:24:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 503 states have (on average 1.459244532803181) internal successors, (734), 509 states have internal predecessors, (734), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-28 20:24:55,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 756 transitions. [2023-11-28 20:24:55,936 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 756 transitions. Word has length 207 [2023-11-28 20:24:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:55,936 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 756 transitions. [2023-11-28 20:24:55,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2023-11-28 20:24:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 756 transitions. [2023-11-28 20:24:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-28 20:24:55,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:55,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:55,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:24:56,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-28 20:24:56,149 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:56,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:56,149 INFO L85 PathProgramCache]: Analyzing trace with hash 757841828, now seen corresponding path program 1 times [2023-11-28 20:24:56,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:56,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486761867] [2023-11-28 20:24:56,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:56,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:56,212 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:24:56,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870283631] [2023-11-28 20:24:56,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:56,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:56,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:56,213 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:56,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:24:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:56,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:24:56,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:56,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:24:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:57,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:57,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486761867] [2023-11-28 20:24:57,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:24:57,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870283631] [2023-11-28 20:24:57,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870283631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:24:57,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:24:57,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-28 20:24:57,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600889505] [2023-11-28 20:24:57,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:24:57,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:24:57,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:57,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:24:57,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:24:57,034 INFO L87 Difference]: Start difference. First operand 518 states and 756 transitions. Second operand has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:57,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:57,248 INFO L93 Difference]: Finished difference Result 2043 states and 2997 transitions. [2023-11-28 20:24:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:24:57,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2023-11-28 20:24:57,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:57,260 INFO L225 Difference]: With dead ends: 2043 [2023-11-28 20:24:57,260 INFO L226 Difference]: Without dead ends: 1882 [2023-11-28 20:24:57,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:24:57,262 INFO L413 NwaCegarLoop]: 868 mSDtfsCounter, 3071 mSDsluCounter, 2181 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3110 SdHoareTripleChecker+Valid, 3049 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:57,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3110 Valid, 3049 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:24:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2023-11-28 20:24:57,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1574. [2023-11-28 20:24:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1541 states have (on average 1.4497079818299805) internal successors, (2234), 1547 states have internal predecessors, (2234), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-28 20:24:57,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 2292 transitions. [2023-11-28 20:24:57,314 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 2292 transitions. Word has length 207 [2023-11-28 20:24:57,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:57,314 INFO L495 AbstractCegarLoop]: Abstraction has 1574 states and 2292 transitions. [2023-11-28 20:24:57,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:57,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 2292 transitions. [2023-11-28 20:24:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2023-11-28 20:24:57,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:57,335 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:57,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 20:24:57,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-28 20:24:57,536 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:57,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:57,537 INFO L85 PathProgramCache]: Analyzing trace with hash 988259341, now seen corresponding path program 2 times [2023-11-28 20:24:57,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:57,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665126832] [2023-11-28 20:24:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:57,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:57,733 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:24:57,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198478943] [2023-11-28 20:24:57,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:24:57,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:57,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:57,735 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:57,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:24:58,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-28 20:24:58,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:24:58,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 20:24:58,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2023-11-28 20:24:58,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:24:58,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:58,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665126832] [2023-11-28 20:24:58,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:24:58,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198478943] [2023-11-28 20:24:58,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198478943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:58,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:58,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:24:58,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550065641] [2023-11-28 20:24:58,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:58,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:24:58,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:58,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:24:58,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:24:58,614 INFO L87 Difference]: Start difference. First operand 1574 states and 2292 transitions. Second operand has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 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) [2023-11-28 20:24:59,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:59,002 INFO L93 Difference]: Finished difference Result 1774 states and 2580 transitions. [2023-11-28 20:24:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:24:59,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 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 645 [2023-11-28 20:24:59,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:59,015 INFO L225 Difference]: With dead ends: 1774 [2023-11-28 20:24:59,016 INFO L226 Difference]: Without dead ends: 1614 [2023-11-28 20:24:59,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:24:59,017 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 12 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:59,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2612 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:24:59,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2023-11-28 20:24:59,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1611. [2023-11-28 20:24:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1578 states have (on average 1.443599493029151) internal successors, (2278), 1584 states have internal predecessors, (2278), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-28 20:24:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2336 transitions. [2023-11-28 20:24:59,072 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2336 transitions. Word has length 645 [2023-11-28 20:24:59,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:59,073 INFO L495 AbstractCegarLoop]: Abstraction has 1611 states and 2336 transitions. [2023-11-28 20:24:59,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 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) [2023-11-28 20:24:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2336 transitions. [2023-11-28 20:24:59,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2023-11-28 20:24:59,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:59,081 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:59,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 20:24:59,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 20:24:59,282 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:59,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:59,283 INFO L85 PathProgramCache]: Analyzing trace with hash -672094990, now seen corresponding path program 1 times [2023-11-28 20:24:59,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:59,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190762742] [2023-11-28 20:24:59,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:59,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:59,471 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:24:59,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926838164] [2023-11-28 20:24:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:59,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:59,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:59,473 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:59,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 20:25:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:00,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 2902 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:25:00,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:25:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:25:01,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:25:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:25:01,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:01,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190762742] [2023-11-28 20:25:01,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:25:01,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926838164] [2023-11-28 20:25:01,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926838164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:25:01,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:25:01,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-28 20:25:01,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21898484] [2023-11-28 20:25:01,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:25:01,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-28 20:25:01,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:01,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-28 20:25:01,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:25:01,898 INFO L87 Difference]: Start difference. First operand 1611 states and 2336 transitions. Second operand has 12 states, 12 states have (on average 102.66666666666667) internal successors, (1232), 11 states have internal predecessors, (1232), 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) [2023-11-28 20:25:02,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:02,446 INFO L93 Difference]: Finished difference Result 4876 states and 7076 transitions. [2023-11-28 20:25:02,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:25:02,447 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 102.66666666666667) internal successors, (1232), 11 states have internal predecessors, (1232), 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 646 [2023-11-28 20:25:02,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:02,474 INFO L225 Difference]: With dead ends: 4876 [2023-11-28 20:25:02,474 INFO L226 Difference]: Without dead ends: 4678 [2023-11-28 20:25:02,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1290 GetRequests, 1280 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:25:02,477 INFO L413 NwaCegarLoop]: 914 mSDtfsCounter, 10286 mSDsluCounter, 5954 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10376 SdHoareTripleChecker+Valid, 6868 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:02,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10376 Valid, 6868 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:25:02,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2023-11-28 20:25:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 3723. [2023-11-28 20:25:02,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3723 states, 3654 states have (on average 1.4444444444444444) internal successors, (5278), 3660 states have internal predecessors, (5278), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-28 20:25:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 5408 transitions. [2023-11-28 20:25:02,590 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 5408 transitions. Word has length 646 [2023-11-28 20:25:02,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:02,591 INFO L495 AbstractCegarLoop]: Abstraction has 3723 states and 5408 transitions. [2023-11-28 20:25:02,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 102.66666666666667) internal successors, (1232), 11 states have internal predecessors, (1232), 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) [2023-11-28 20:25:02,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 5408 transitions. [2023-11-28 20:25:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1523 [2023-11-28 20:25:02,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:02,618 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:25:02,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 20:25:02,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-28 20:25:02,819 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:02,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:02,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1899706208, now seen corresponding path program 2 times [2023-11-28 20:25:02,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:02,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450068844] [2023-11-28 20:25:02,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:02,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:03,275 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:25:03,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425799682] [2023-11-28 20:25:03,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:25:03,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:03,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:25:03,277 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:25:03,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 20:25:04,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-28 20:25:04,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:25:04,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-28 20:25:04,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:25:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6580 trivial. 0 not checked. [2023-11-28 20:25:04,661 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:25:04,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:04,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450068844] [2023-11-28 20:25:04,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:25:04,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425799682] [2023-11-28 20:25:04,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425799682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:25:04,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:25:04,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:25:04,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961978385] [2023-11-28 20:25:04,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:25:04,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:25:04,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:04,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:25:04,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:25:04,664 INFO L87 Difference]: Start difference. First operand 3723 states and 5408 transitions. Second operand has 7 states, 7 states have (on average 29.714285714285715) internal successors, (208), 7 states have internal predecessors, (208), 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) [2023-11-28 20:25:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:05,162 INFO L93 Difference]: Finished difference Result 3931 states and 5707 transitions. [2023-11-28 20:25:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:25:05,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.714285714285715) internal successors, (208), 7 states have internal predecessors, (208), 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 1522 [2023-11-28 20:25:05,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:05,186 INFO L225 Difference]: With dead ends: 3931 [2023-11-28 20:25:05,186 INFO L226 Difference]: Without dead ends: 3734 [2023-11-28 20:25:05,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1516 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:25:05,188 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 17 mSDsluCounter, 3043 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3759 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:05,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3759 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:25:05,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3734 states. [2023-11-28 20:25:05,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3734 to 3731. [2023-11-28 20:25:05,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 3662 states have (on average 1.4445658110322228) internal successors, (5290), 3668 states have internal predecessors, (5290), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-28 20:25:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5420 transitions. [2023-11-28 20:25:05,290 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5420 transitions. Word has length 1522 [2023-11-28 20:25:05,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:05,292 INFO L495 AbstractCegarLoop]: Abstraction has 3731 states and 5420 transitions. [2023-11-28 20:25:05,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.714285714285715) internal successors, (208), 7 states have internal predecessors, (208), 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) [2023-11-28 20:25:05,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5420 transitions. [2023-11-28 20:25:05,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1524 [2023-11-28 20:25:05,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:05,348 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:25:05,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-28 20:25:05,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:05,549 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:05,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:05,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1071662230, now seen corresponding path program 1 times [2023-11-28 20:25:05,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:05,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080530976] [2023-11-28 20:25:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:05,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:05,981 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:25:05,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98107699] [2023-11-28 20:25:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:05,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:05,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:25:05,982 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:25:05,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 20:25:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:08,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 6959 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:25:08,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:25:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 6084 trivial. 0 not checked. [2023-11-28 20:25:08,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:25:08,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:08,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080530976] [2023-11-28 20:25:08,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:25:08,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98107699] [2023-11-28 20:25:08,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98107699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:25:08,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:25:08,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:25:08,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872362712] [2023-11-28 20:25:08,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:25:08,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:25:08,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:08,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:25:08,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:25:08,492 INFO L87 Difference]: Start difference. First operand 3731 states and 5420 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 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) [2023-11-28 20:25:08,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:08,615 INFO L93 Difference]: Finished difference Result 7332 states and 10648 transitions. [2023-11-28 20:25:08,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:25:08,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 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 1523 [2023-11-28 20:25:08,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:08,635 INFO L225 Difference]: With dead ends: 7332 [2023-11-28 20:25:08,635 INFO L226 Difference]: Without dead ends: 3729 [2023-11-28 20:25:08,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1521 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:25:08,641 INFO L413 NwaCegarLoop]: 733 mSDtfsCounter, 123 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:08,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1452 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:25:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2023-11-28 20:25:08,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3729. [2023-11-28 20:25:08,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 3660 states have (on average 1.444535519125683) internal successors, (5287), 3666 states have internal predecessors, (5287), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-28 20:25:08,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 5417 transitions. [2023-11-28 20:25:08,736 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 5417 transitions. Word has length 1523 [2023-11-28 20:25:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:08,737 INFO L495 AbstractCegarLoop]: Abstraction has 3729 states and 5417 transitions. [2023-11-28 20:25:08,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 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) [2023-11-28 20:25:08,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 5417 transitions. [2023-11-28 20:25:08,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1537 [2023-11-28 20:25:08,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:08,774 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2023-11-28 20:25:08,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 20:25:08,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-28 20:25:08,975 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:08,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:08,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1912398569, now seen corresponding path program 1 times [2023-11-28 20:25:08,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:08,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205532498] [2023-11-28 20:25:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:08,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:09,502 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:25:09,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572151055] [2023-11-28 20:25:09,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:09,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:09,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:25:09,503 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:25:09,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 20:25:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:12,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 7106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:25:12,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:25:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6565 backedges. 1117 proven. 0 refuted. 0 times theorem prover too weak. 5448 trivial. 0 not checked. [2023-11-28 20:25:12,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:25:12,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:12,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205532498] [2023-11-28 20:25:12,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:25:12,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572151055] [2023-11-28 20:25:12,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572151055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:25:12,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:25:12,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:25:12,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195178895] [2023-11-28 20:25:12,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:25:12,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:25:12,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:12,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:25:12,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:25:12,557 INFO L87 Difference]: Start difference. First operand 3729 states and 5417 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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) [2023-11-28 20:25:12,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:12,662 INFO L93 Difference]: Finished difference Result 7335 states and 10651 transitions. [2023-11-28 20:25:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:25:12,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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 1536 [2023-11-28 20:25:12,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:12,678 INFO L225 Difference]: With dead ends: 7335 [2023-11-28 20:25:12,678 INFO L226 Difference]: Without dead ends: 3906 [2023-11-28 20:25:12,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1535 GetRequests, 1534 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:25:12,683 INFO L413 NwaCegarLoop]: 903 mSDtfsCounter, 472 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:12,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 1616 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:25:12,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3906 states. [2023-11-28 20:25:12,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3906 to 3904. [2023-11-28 20:25:12,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3904 states, 3830 states have (on average 1.4443864229765013) internal successors, (5532), 3841 states have internal predecessors, (5532), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 62 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-28 20:25:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3904 states to 3904 states and 5672 transitions. [2023-11-28 20:25:12,755 INFO L78 Accepts]: Start accepts. Automaton has 3904 states and 5672 transitions. Word has length 1536 [2023-11-28 20:25:12,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:12,755 INFO L495 AbstractCegarLoop]: Abstraction has 3904 states and 5672 transitions. [2023-11-28 20:25:12,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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) [2023-11-28 20:25:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3904 states and 5672 transitions. [2023-11-28 20:25:12,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1550 [2023-11-28 20:25:12,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:12,779 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:25:12,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-28 20:25:12,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 20:25:12,980 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:12,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:12,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1849194396, now seen corresponding path program 1 times [2023-11-28 20:25:12,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:12,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692697613] [2023-11-28 20:25:12,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:12,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:13,476 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:25:13,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103616166] [2023-11-28 20:25:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:13,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:13,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:25:13,478 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:25:13,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 20:25:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:16,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 7253 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:25:16,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:25:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 2164 proven. 0 refuted. 0 times theorem prover too weak. 4398 trivial. 0 not checked. [2023-11-28 20:25:19,644 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:25:19,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:19,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692697613] [2023-11-28 20:25:19,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:25:19,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103616166] [2023-11-28 20:25:19,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103616166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:25:19,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:25:19,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:25:19,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121831947] [2023-11-28 20:25:19,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:25:19,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:25:19,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:19,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:25:19,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:25:19,647 INFO L87 Difference]: Start difference. First operand 3904 states and 5672 transitions. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-28 20:25:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:19,781 INFO L93 Difference]: Finished difference Result 9755 states and 14186 transitions. [2023-11-28 20:25:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:25:19,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1549 [2023-11-28 20:25:19,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:19,811 INFO L225 Difference]: With dead ends: 9755 [2023-11-28 20:25:19,811 INFO L226 Difference]: Without dead ends: 6846 [2023-11-28 20:25:19,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1548 GetRequests, 1547 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:25:19,818 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 495 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1870 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:19,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 1870 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:25:19,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2023-11-28 20:25:19,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 6844. [2023-11-28 20:25:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6844 states, 6737 states have (on average 1.4473801395279797) internal successors, (9751), 6748 states have internal predecessors, (9751), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 95 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-28 20:25:19,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6844 states to 6844 states and 9957 transitions. [2023-11-28 20:25:19,946 INFO L78 Accepts]: Start accepts. Automaton has 6844 states and 9957 transitions. Word has length 1549 [2023-11-28 20:25:19,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:19,948 INFO L495 AbstractCegarLoop]: Abstraction has 6844 states and 9957 transitions. [2023-11-28 20:25:19,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-28 20:25:19,948 INFO L276 IsEmpty]: Start isEmpty. Operand 6844 states and 9957 transitions. [2023-11-28 20:25:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1560 [2023-11-28 20:25:19,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:19,977 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:25:20,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-28 20:25:20,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 20:25:20,178 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:20,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:20,179 INFO L85 PathProgramCache]: Analyzing trace with hash 498216823, now seen corresponding path program 1 times [2023-11-28 20:25:20,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:20,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049812986] [2023-11-28 20:25:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:20,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:20,633 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:25:20,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044571504] [2023-11-28 20:25:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:20,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:20,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:25:20,637 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:25:20,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 20:25:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:23,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 7289 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-28 20:25:23,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:25:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 6255 trivial. 0 not checked. [2023-11-28 20:25:23,560 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:25:23,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:23,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049812986] [2023-11-28 20:25:23,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:25:23,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044571504] [2023-11-28 20:25:23,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044571504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:25:23,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:25:23,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:25:23,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263585965] [2023-11-28 20:25:23,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:25:23,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:25:23,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:23,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:25:23,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:25:23,563 INFO L87 Difference]: Start difference. First operand 6844 states and 9957 transitions. Second operand has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-28 20:25:24,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:24,023 INFO L93 Difference]: Finished difference Result 14328 states and 20717 transitions. [2023-11-28 20:25:24,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:25:24,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1559 [2023-11-28 20:25:24,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:24,038 INFO L225 Difference]: With dead ends: 14328 [2023-11-28 20:25:24,038 INFO L226 Difference]: Without dead ends: 7564 [2023-11-28 20:25:24,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1558 GetRequests, 1554 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:25:24,046 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 12 mSDsluCounter, 2469 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3192 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:24,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3192 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:25:24,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7564 states. [2023-11-28 20:25:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7564 to 7510. [2023-11-28 20:25:24,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7510 states, 7403 states have (on average 1.424152370660543) internal successors, (10543), 7414 states have internal predecessors, (10543), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 95 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-28 20:25:24,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7510 states to 7510 states and 10749 transitions. [2023-11-28 20:25:24,217 INFO L78 Accepts]: Start accepts. Automaton has 7510 states and 10749 transitions. Word has length 1559 [2023-11-28 20:25:24,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:24,218 INFO L495 AbstractCegarLoop]: Abstraction has 7510 states and 10749 transitions. [2023-11-28 20:25:24,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-28 20:25:24,219 INFO L276 IsEmpty]: Start isEmpty. Operand 7510 states and 10749 transitions. [2023-11-28 20:25:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1570 [2023-11-28 20:25:24,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:24,254 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:25:24,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-28 20:25:24,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 20:25:24,455 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:24,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:24,455 INFO L85 PathProgramCache]: Analyzing trace with hash -534171611, now seen corresponding path program 1 times [2023-11-28 20:25:24,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:24,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224564704] [2023-11-28 20:25:24,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:24,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:25,013 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:25:25,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693636120] [2023-11-28 20:25:25,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:25,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:25,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:25:25,015 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:25:25,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 20:25:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:28,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 7299 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-28 20:25:28,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:25:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6607 backedges. 334 proven. 0 refuted. 0 times theorem prover too weak. 6273 trivial. 0 not checked. [2023-11-28 20:25:28,204 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:25:28,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:28,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224564704] [2023-11-28 20:25:28,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:25:28,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693636120] [2023-11-28 20:25:28,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693636120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:25:28,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:25:28,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:25:28,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11546645] [2023-11-28 20:25:28,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:25:28,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:25:28,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:28,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:25:28,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:25:28,207 INFO L87 Difference]: Start difference. First operand 7510 states and 10749 transitions. Second operand has 7 states, 7 states have (on average 39.285714285714285) internal successors, (275), 7 states have internal predecessors, (275), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-28 20:25:28,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:28,773 INFO L93 Difference]: Finished difference Result 15093 states and 21649 transitions. [2023-11-28 20:25:28,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:25:28,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 39.285714285714285) internal successors, (275), 7 states have internal predecessors, (275), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1569 [2023-11-28 20:25:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:28,786 INFO L225 Difference]: With dead ends: 15093 [2023-11-28 20:25:28,787 INFO L226 Difference]: Without dead ends: 7708 [2023-11-28 20:25:28,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1569 GetRequests, 1563 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:25:28,794 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 17 mSDsluCounter, 3043 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3759 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:28,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3759 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:25:28,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7708 states. [2023-11-28 20:25:28,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7708 to 7654. [2023-11-28 20:25:28,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7654 states, 7547 states have (on average 1.4255995759904598) internal successors, (10759), 7558 states have internal predecessors, (10759), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 95 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-28 20:25:28,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7654 states to 7654 states and 10965 transitions. [2023-11-28 20:25:28,905 INFO L78 Accepts]: Start accepts. Automaton has 7654 states and 10965 transitions. Word has length 1569 [2023-11-28 20:25:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:28,906 INFO L495 AbstractCegarLoop]: Abstraction has 7654 states and 10965 transitions. [2023-11-28 20:25:28,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.285714285714285) internal successors, (275), 7 states have internal predecessors, (275), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-28 20:25:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 7654 states and 10965 transitions. [2023-11-28 20:25:28,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1580 [2023-11-28 20:25:28,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:28,983 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:25:29,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-28 20:25:29,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 20:25:29,184 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:29,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:29,187 INFO L85 PathProgramCache]: Analyzing trace with hash -153371163, now seen corresponding path program 1 times [2023-11-28 20:25:29,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:29,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399988265] [2023-11-28 20:25:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:29,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:29,690 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:25:29,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115766032] [2023-11-28 20:25:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:29,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:29,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:25:29,693 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:25:29,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-28 20:25:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:32,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 7309 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-28 20:25:32,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:25:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6652 backedges. 2080 proven. 0 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-28 20:25:32,953 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:25:32,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:32,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399988265] [2023-11-28 20:25:32,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:25:32,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115766032] [2023-11-28 20:25:32,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115766032] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:25:32,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:25:32,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-28 20:25:32,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914966631] [2023-11-28 20:25:32,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:25:32,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-28 20:25:32,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:32,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-28 20:25:32,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:25:32,957 INFO L87 Difference]: Start difference. First operand 7654 states and 10965 transitions. Second operand has 11 states, 11 states have (on average 37.90909090909091) internal successors, (417), 11 states have internal predecessors, (417), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-28 20:25:33,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:33,678 INFO L93 Difference]: Finished difference Result 16075 states and 22915 transitions. [2023-11-28 20:25:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-28 20:25:33,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 37.90909090909091) internal successors, (417), 11 states have internal predecessors, (417), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1579 [2023-11-28 20:25:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:33,690 INFO L225 Difference]: With dead ends: 16075 [2023-11-28 20:25:33,690 INFO L226 Difference]: Without dead ends: 8554 [2023-11-28 20:25:33,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1579 GetRequests, 1569 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:25:33,697 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 33 mSDsluCounter, 5008 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 5723 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:33,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 5723 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 20:25:33,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8554 states. [2023-11-28 20:25:33,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8554 to 8374. [2023-11-28 20:25:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8374 states, 8267 states have (on average 1.4037740413692996) internal successors, (11605), 8278 states have internal predecessors, (11605), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 95 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-28 20:25:33,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8374 states to 8374 states and 11811 transitions. [2023-11-28 20:25:33,822 INFO L78 Accepts]: Start accepts. Automaton has 8374 states and 11811 transitions. Word has length 1579 [2023-11-28 20:25:33,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:33,822 INFO L495 AbstractCegarLoop]: Abstraction has 8374 states and 11811 transitions. [2023-11-28 20:25:33,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 37.90909090909091) internal successors, (417), 11 states have internal predecessors, (417), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-28 20:25:33,822 INFO L276 IsEmpty]: Start isEmpty. Operand 8374 states and 11811 transitions. [2023-11-28 20:25:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1590 [2023-11-28 20:25:33,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:33,850 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:25:33,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-28 20:25:34,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 20:25:34,051 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:34,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:34,052 INFO L85 PathProgramCache]: Analyzing trace with hash 594928449, now seen corresponding path program 1 times [2023-11-28 20:25:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:34,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256852252] [2023-11-28 20:25:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:34,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:34,575 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:25:34,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647707752] [2023-11-28 20:25:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:34,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:34,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:25:34,576 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:25:34,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-28 20:25:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:37,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 7299 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-28 20:25:37,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:25:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6697 backedges. 985 proven. 0 refuted. 0 times theorem prover too weak. 5712 trivial. 0 not checked. [2023-11-28 20:25:37,787 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:25:37,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:37,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256852252] [2023-11-28 20:25:37,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:25:37,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647707752] [2023-11-28 20:25:37,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647707752] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:25:37,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:25:37,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:25:37,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361563017] [2023-11-28 20:25:37,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:25:37,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:25:37,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:37,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:25:37,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:25:37,791 INFO L87 Difference]: Start difference. First operand 8374 states and 11811 transitions. Second operand has 7 states, 7 states have (on average 49.857142857142854) internal successors, (349), 7 states have internal predecessors, (349), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-28 20:25:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:38,308 INFO L93 Difference]: Finished difference Result 16601 states and 23463 transitions. [2023-11-28 20:25:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:25:38,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 49.857142857142854) internal successors, (349), 7 states have internal predecessors, (349), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 1589 [2023-11-28 20:25:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:38,322 INFO L225 Difference]: With dead ends: 16601 [2023-11-28 20:25:38,322 INFO L226 Difference]: Without dead ends: 8572 [2023-11-28 20:25:38,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1589 GetRequests, 1583 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:25:38,330 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 17 mSDsluCounter, 3043 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3759 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:38,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3759 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:25:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8572 states. [2023-11-28 20:25:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8572 to 8518. [2023-11-28 20:25:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8518 states, 8411 states have (on average 1.4054214718820592) internal successors, (11821), 8422 states have internal predecessors, (11821), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 95 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-28 20:25:38,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8518 states to 8518 states and 12027 transitions. [2023-11-28 20:25:38,451 INFO L78 Accepts]: Start accepts. Automaton has 8518 states and 12027 transitions. Word has length 1589 [2023-11-28 20:25:38,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:38,451 INFO L495 AbstractCegarLoop]: Abstraction has 8518 states and 12027 transitions. [2023-11-28 20:25:38,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 49.857142857142854) internal successors, (349), 7 states have internal predecessors, (349), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-28 20:25:38,452 INFO L276 IsEmpty]: Start isEmpty. Operand 8518 states and 12027 transitions. [2023-11-28 20:25:38,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1600 [2023-11-28 20:25:38,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:38,480 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:25:38,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-28 20:25:38,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:38,681 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:38,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:38,682 INFO L85 PathProgramCache]: Analyzing trace with hash 972598213, now seen corresponding path program 1 times [2023-11-28 20:25:38,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:38,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317917335] [2023-11-28 20:25:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:38,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:39,324 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:25:39,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545228912] [2023-11-28 20:25:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:39,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:39,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:25:39,326 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:25:39,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-28 20:25:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:42,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 7309 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:25:42,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:25:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6742 backedges. 967 proven. 0 refuted. 0 times theorem prover too weak. 5775 trivial. 0 not checked. [2023-11-28 20:25:42,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:25:42,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:42,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317917335] [2023-11-28 20:25:42,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:25:42,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545228912] [2023-11-28 20:25:42,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545228912] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:25:42,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:25:42,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-28 20:25:42,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090507540] [2023-11-28 20:25:42,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:25:42,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 20:25:42,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:42,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 20:25:42,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:25:42,968 INFO L87 Difference]: Start difference. First operand 8518 states and 12027 transitions. Second operand has 10 states, 10 states have (on average 34.8) internal successors, (348), 10 states have internal predecessors, (348), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-28 20:25:43,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:43,620 INFO L93 Difference]: Finished difference Result 17102 states and 24212 transitions. [2023-11-28 20:25:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:25:43,621 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 34.8) internal successors, (348), 10 states have internal predecessors, (348), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 1599 [2023-11-28 20:25:43,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:43,632 INFO L225 Difference]: With dead ends: 17102 [2023-11-28 20:25:43,632 INFO L226 Difference]: Without dead ends: 8716 [2023-11-28 20:25:43,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1603 GetRequests, 1591 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:25:43,641 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 58 mSDsluCounter, 5212 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 5922 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:43,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 5922 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:25:43,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8716 states. [2023-11-28 20:25:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8716 to 8464. [2023-11-28 20:25:43,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8464 states, 8357 states have (on average 1.403733397152088) internal successors, (11731), 8368 states have internal predecessors, (11731), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 95 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-28 20:25:43,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8464 states to 8464 states and 11937 transitions. [2023-11-28 20:25:43,870 INFO L78 Accepts]: Start accepts. Automaton has 8464 states and 11937 transitions. Word has length 1599 [2023-11-28 20:25:43,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:43,871 INFO L495 AbstractCegarLoop]: Abstraction has 8464 states and 11937 transitions. [2023-11-28 20:25:43,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.8) internal successors, (348), 10 states have internal predecessors, (348), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-28 20:25:43,871 INFO L276 IsEmpty]: Start isEmpty. Operand 8464 states and 11937 transitions. [2023-11-28 20:25:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1600 [2023-11-28 20:25:43,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:43,902 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:25:43,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-28 20:25:44,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:44,102 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:44,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:44,103 INFO L85 PathProgramCache]: Analyzing trace with hash 277351525, now seen corresponding path program 1 times [2023-11-28 20:25:44,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:44,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171955978] [2023-11-28 20:25:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:44,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:44,631 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:25:44,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597442772] [2023-11-28 20:25:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:44,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:44,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:25:44,633 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:25:44,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-28 20:25:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:47,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 7289 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:25:47,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:25:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6742 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 6481 trivial. 0 not checked. [2023-11-28 20:25:48,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:25:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6742 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6742 trivial. 0 not checked. [2023-11-28 20:25:48,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:48,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171955978] [2023-11-28 20:25:48,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:25:48,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597442772] [2023-11-28 20:25:48,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597442772] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:25:48,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:25:48,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-11-28 20:25:48,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307803667] [2023-11-28 20:25:48,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:25:48,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:25:48,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:48,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:25:48,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:25:48,254 INFO L87 Difference]: Start difference. First operand 8464 states and 11937 transitions. Second operand has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-28 20:25:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:49,062 INFO L93 Difference]: Finished difference Result 9115 states and 12863 transitions. [2023-11-28 20:25:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:25:49,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1599 [2023-11-28 20:25:49,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:49,079 INFO L225 Difference]: With dead ends: 9115 [2023-11-28 20:25:49,079 INFO L226 Difference]: Without dead ends: 8698 [2023-11-28 20:25:49,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3199 GetRequests, 3184 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:25:49,083 INFO L413 NwaCegarLoop]: 750 mSDtfsCounter, 142 mSDsluCounter, 2708 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:49,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 3458 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 20:25:49,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8698 states. [2023-11-28 20:25:49,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8698 to 8464. [2023-11-28 20:25:49,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8464 states, 8357 states have (on average 1.403374416656695) internal successors, (11728), 8368 states have internal predecessors, (11728), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 95 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-28 20:25:49,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8464 states to 8464 states and 11934 transitions. [2023-11-28 20:25:49,272 INFO L78 Accepts]: Start accepts. Automaton has 8464 states and 11934 transitions. Word has length 1599 [2023-11-28 20:25:49,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:49,273 INFO L495 AbstractCegarLoop]: Abstraction has 8464 states and 11934 transitions. [2023-11-28 20:25:49,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-28 20:25:49,273 INFO L276 IsEmpty]: Start isEmpty. Operand 8464 states and 11934 transitions. [2023-11-28 20:25:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1600 [2023-11-28 20:25:49,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:49,304 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:25:49,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-28 20:25:49,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:49,504 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:49,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1684391425, now seen corresponding path program 1 times [2023-11-28 20:25:49,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:49,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980868397] [2023-11-28 20:25:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:49,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:49,972 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:25:49,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589597497] [2023-11-28 20:25:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:49,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:49,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:25:49,973 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:25:49,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b935dd32-4d84-4ae8-91ef-cef58ab8b0ba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process