./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test1-1.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_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/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_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/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_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/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 8a34048511216dfe9a14f70dd929fd2de5a6eaf4560cb9e9e466dd0467a1d6d7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:43:37,340 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:43:37,406 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:43:37,410 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:43:37,411 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:43:37,433 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:43:37,434 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:43:37,434 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:43:37,435 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:43:37,435 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:43:37,436 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:43:37,436 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:43:37,437 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:43:37,438 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:43:37,438 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:43:37,439 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:43:37,439 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:43:37,440 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:43:37,440 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:43:37,441 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:43:37,441 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:43:37,442 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:43:37,442 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:43:37,443 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:43:37,443 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:43:37,444 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:43:37,444 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:43:37,445 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:43:37,445 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:43:37,445 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:43:37,446 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:43:37,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:43:37,446 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:43:37,447 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:43:37,447 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:43:37,447 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:43:37,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:43:37,448 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:43:37,448 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:43:37,448 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:43:37,448 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:43:37,449 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:43:37,449 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_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a34048511216dfe9a14f70dd929fd2de5a6eaf4560cb9e9e466dd0467a1d6d7 [2023-11-28 20:43:37,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:43:37,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:43:37,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:43:37,696 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:43:37,696 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:43:37,697 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test1-1.i [2023-11-28 20:43:40,484 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:43:40,755 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:43:40,756 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test1-1.i [2023-11-28 20:43:40,776 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/data/a9ddebb8f/723de0184fd047c3a40c79e9956c292e/FLAG929e0b3e3 [2023-11-28 20:43:40,789 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/data/a9ddebb8f/723de0184fd047c3a40c79e9956c292e [2023-11-28 20:43:40,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:43:40,793 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:43:40,794 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:43:40,795 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:43:40,799 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:43:40,800 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:43:40" (1/1) ... [2023-11-28 20:43:40,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59463e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:40, skipping insertion in model container [2023-11-28 20:43:40,801 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:43:40" (1/1) ... [2023-11-28 20:43:40,870 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:43:41,168 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_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test1-1.i[33021,33034] [2023-11-28 20:43:41,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:43:41,255 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:43:41,285 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_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test1-1.i[33021,33034] [2023-11-28 20:43:41,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:43:41,363 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:43:41,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:41 WrapperNode [2023-11-28 20:43:41,364 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:43:41,365 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:43:41,365 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:43:41,365 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:43:41,371 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:41" (1/1) ... [2023-11-28 20:43:41,397 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:41" (1/1) ... [2023-11-28 20:43:41,440 INFO L138 Inliner]: procedures = 177, calls = 186, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 790 [2023-11-28 20:43:41,440 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:43:41,441 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:43:41,441 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:43:41,442 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:43:41,453 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:41" (1/1) ... [2023-11-28 20:43:41,453 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:41" (1/1) ... [2023-11-28 20:43:41,462 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:41" (1/1) ... [2023-11-28 20:43:41,505 INFO L175 MemorySlicer]: Split 163 memory accesses to 3 slices as follows [2, 156, 5]. 96 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 43 writes are split as follows [0, 42, 1]. [2023-11-28 20:43:41,505 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:41" (1/1) ... [2023-11-28 20:43:41,505 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:41" (1/1) ... [2023-11-28 20:43:41,533 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:41" (1/1) ... [2023-11-28 20:43:41,579 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:41" (1/1) ... [2023-11-28 20:43:41,585 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:41" (1/1) ... [2023-11-28 20:43:41,590 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:41" (1/1) ... [2023-11-28 20:43:41,615 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:43:41,616 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:43:41,617 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:43:41,617 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:43:41,618 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:41" (1/1) ... [2023-11-28 20:43:41,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:43:41,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:41,652 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:43:41,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:43:41,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:43:41,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:43:41,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 20:43:41,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-28 20:43:41,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-28 20:43:41,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:43:41,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:43:41,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 20:43:41,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-28 20:43:41,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-28 20:43:41,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-28 20:43:41,687 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-28 20:43:41,687 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-28 20:43:41,687 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-28 20:43:41,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-28 20:43:41,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:43:41,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:43:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-28 20:43:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-28 20:43:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-28 20:43:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-28 20:43:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-28 20:43:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-28 20:43:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:43:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:43:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:43:41,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:43:41,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:43:41,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:43:41,867 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:43:41,869 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:43:42,832 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:43:42,867 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:43:42,867 INFO L309 CfgBuilder]: Removed 31 assume(true) statements. [2023-11-28 20:43:42,868 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:43:42 BoogieIcfgContainer [2023-11-28 20:43:42,868 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:43:42,871 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:43:42,871 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:43:42,874 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:43:42,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:43:40" (1/3) ... [2023-11-28 20:43:42,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cee7a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:43:42, skipping insertion in model container [2023-11-28 20:43:42,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:41" (2/3) ... [2023-11-28 20:43:42,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cee7a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:43:42, skipping insertion in model container [2023-11-28 20:43:42,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:43:42" (3/3) ... [2023-11-28 20:43:42,877 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test1-1.i [2023-11-28 20:43:42,896 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:43:42,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:43:42,953 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:43:42,960 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;@4567241c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:43:42,960 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:43:42,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 207 states, 190 states have (on average 1.7052631578947368) internal successors, (324), 201 states have internal predecessors, (324), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-28 20:43:42,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-28 20:43:42,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:42,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:42,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:42,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:42,980 INFO L85 PathProgramCache]: Analyzing trace with hash -189480315, now seen corresponding path program 1 times [2023-11-28 20:43:42,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:42,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25877301] [2023-11-28 20:43:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:42,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:43,181 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 20:43:43,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:43,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25877301] [2023-11-28 20:43:43,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25877301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:43,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:43,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:43:43,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475398921] [2023-11-28 20:43:43,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:43,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:43:43,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:43,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:43:43,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:43:43,220 INFO L87 Difference]: Start difference. First operand has 207 states, 190 states have (on average 1.7052631578947368) internal successors, (324), 201 states have internal predecessors, (324), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:43,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:43,321 INFO L93 Difference]: Finished difference Result 585 states and 1003 transitions. [2023-11-28 20:43:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:43:43,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-28 20:43:43,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:43,337 INFO L225 Difference]: With dead ends: 585 [2023-11-28 20:43:43,337 INFO L226 Difference]: Without dead ends: 377 [2023-11-28 20:43:43,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 20:43:43,345 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 252 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:43,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 653 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:43:43,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-11-28 20:43:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 206. [2023-11-28 20:43:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 190 states have (on average 1.5105263157894737) internal successors, (287), 200 states have internal predecessors, (287), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-28 20:43:43,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 313 transitions. [2023-11-28 20:43:43,402 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 313 transitions. Word has length 9 [2023-11-28 20:43:43,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:43,403 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 313 transitions. [2023-11-28 20:43:43,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:43,403 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 313 transitions. [2023-11-28 20:43:43,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-28 20:43:43,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:43,407 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] [2023-11-28 20:43:43,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:43:43,408 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:43,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:43,409 INFO L85 PathProgramCache]: Analyzing trace with hash -40822134, now seen corresponding path program 1 times [2023-11-28 20:43:43,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:43,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581565732] [2023-11-28 20:43:43,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:43,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:43,486 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:43:43,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830656137] [2023-11-28 20:43:43,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:43,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:43,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:43,493 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:43,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:43:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:43,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:43:43,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:43,837 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 20:43:43,838 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:43:43,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:43,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581565732] [2023-11-28 20:43:43,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:43:43,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830656137] [2023-11-28 20:43:43,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830656137] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:43,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:43,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:43:43,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644154688] [2023-11-28 20:43:43,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:43,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:43:43,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:43,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:43:43,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:43:43,843 INFO L87 Difference]: Start difference. First operand 206 states and 313 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:43,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:43,948 INFO L93 Difference]: Finished difference Result 431 states and 655 transitions. [2023-11-28 20:43:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:43:43,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-11-28 20:43:43,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:43,951 INFO L225 Difference]: With dead ends: 431 [2023-11-28 20:43:43,952 INFO L226 Difference]: Without dead ends: 227 [2023-11-28 20:43:43,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 82 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 20:43:43,955 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 9 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 564 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 20:43:43,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 564 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:43:43,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-28 20:43:43,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2023-11-28 20:43:43,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 210 states have (on average 1.4619047619047618) internal successors, (307), 220 states have internal predecessors, (307), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-28 20:43:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 333 transitions. [2023-11-28 20:43:43,975 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 333 transitions. Word has length 84 [2023-11-28 20:43:43,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:43,975 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 333 transitions. [2023-11-28 20:43:43,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:43,976 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 333 transitions. [2023-11-28 20:43:43,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-28 20:43:43,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:43,980 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] [2023-11-28 20:43:43,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:43:44,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:44,185 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:44,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:44,185 INFO L85 PathProgramCache]: Analyzing trace with hash 451804040, now seen corresponding path program 1 times [2023-11-28 20:43:44,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:44,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457759552] [2023-11-28 20:43:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:44,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:44,241 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:43:44,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695967040] [2023-11-28 20:43:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:44,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:44,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:44,243 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:44,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:43:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:44,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:43:44,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:44,555 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 20:43:44,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:43:44,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:44,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457759552] [2023-11-28 20:43:44,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:43:44,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695967040] [2023-11-28 20:43:44,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695967040] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:44,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:44,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:43:44,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695156575] [2023-11-28 20:43:44,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:44,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:43:44,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:44,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:43:44,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:43:44,558 INFO L87 Difference]: Start difference. First operand 226 states and 333 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:44,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:44,647 INFO L93 Difference]: Finished difference Result 437 states and 651 transitions. [2023-11-28 20:43:44,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:43:44,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-11-28 20:43:44,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:44,650 INFO L225 Difference]: With dead ends: 437 [2023-11-28 20:43:44,650 INFO L226 Difference]: Without dead ends: 213 [2023-11-28 20:43:44,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 20:43:44,652 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 165 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 694 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 20:43:44,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 694 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:43:44,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-28 20:43:44,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2023-11-28 20:43:44,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 196 states have (on average 1.4591836734693877) internal successors, (286), 206 states have internal predecessors, (286), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-28 20:43:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 312 transitions. [2023-11-28 20:43:44,669 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 312 transitions. Word has length 84 [2023-11-28 20:43:44,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:44,669 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 312 transitions. [2023-11-28 20:43:44,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:44,669 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 312 transitions. [2023-11-28 20:43:44,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-28 20:43:44,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:44,672 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] [2023-11-28 20:43:44,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:43:44,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:44,877 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:44,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:44,877 INFO L85 PathProgramCache]: Analyzing trace with hash -209873770, now seen corresponding path program 1 times [2023-11-28 20:43:44,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:44,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718387715] [2023-11-28 20:43:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:44,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:44,924 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:43:44,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357953725] [2023-11-28 20:43:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:44,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:44,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:44,926 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:44,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:43:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:45,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:43:45,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:45,314 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 20:43:45,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:45,436 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 20:43:45,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:45,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718387715] [2023-11-28 20:43:45,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:43:45,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357953725] [2023-11-28 20:43:45,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357953725] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:45,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:43:45,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-28 20:43:45,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556645738] [2023-11-28 20:43:45,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:45,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:43:45,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:43:45,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:43:45,440 INFO L87 Difference]: Start difference. First operand 212 states and 312 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:45,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:45,572 INFO L93 Difference]: Finished difference Result 775 states and 1137 transitions. [2023-11-28 20:43:45,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:43:45,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-11-28 20:43:45,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:45,579 INFO L225 Difference]: With dead ends: 775 [2023-11-28 20:43:45,579 INFO L226 Difference]: Without dead ends: 746 [2023-11-28 20:43:45,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 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 20:43:45,581 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 1003 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:45,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 1184 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:43:45,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-11-28 20:43:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 746. [2023-11-28 20:43:45,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 721 states have (on average 1.4452149791955617) internal successors, (1042), 731 states have internal predecessors, (1042), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-28 20:43:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1086 transitions. [2023-11-28 20:43:45,621 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1086 transitions. Word has length 84 [2023-11-28 20:43:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:45,621 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 1086 transitions. [2023-11-28 20:43:45,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1086 transitions. [2023-11-28 20:43:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-28 20:43:45,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:45,630 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:45,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:43:45,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:45,837 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:45,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:45,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1375306053, now seen corresponding path program 2 times [2023-11-28 20:43:45,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:45,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478813113] [2023-11-28 20:43:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:45,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:45,972 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:43:45,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443341470] [2023-11-28 20:43:45,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:43:45,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:45,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:45,977 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:45,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:43:46,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-28 20:43:46,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:43:46,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 20:43:46,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-11-28 20:43:47,524 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:43:47,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:47,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478813113] [2023-11-28 20:43:47,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:43:47,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443341470] [2023-11-28 20:43:47,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443341470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:47,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:47,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:43:47,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053116070] [2023-11-28 20:43:47,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:47,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:43:47,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:47,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:43:47,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:43:47,527 INFO L87 Difference]: Start difference. First operand 746 states and 1086 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:47,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:47,746 INFO L93 Difference]: Finished difference Result 1362 states and 1980 transitions. [2023-11-28 20:43:47,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:43:47,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 309 [2023-11-28 20:43:47,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:47,753 INFO L225 Difference]: With dead ends: 1362 [2023-11-28 20:43:47,753 INFO L226 Difference]: Without dead ends: 744 [2023-11-28 20:43:47,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:43:47,755 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 123 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:47,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 856 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:43:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2023-11-28 20:43:47,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2023-11-28 20:43:47,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 719 states have (on average 1.4450625869262865) internal successors, (1039), 729 states have internal predecessors, (1039), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-28 20:43:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1083 transitions. [2023-11-28 20:43:47,786 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1083 transitions. Word has length 309 [2023-11-28 20:43:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:47,786 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 1083 transitions. [2023-11-28 20:43:47,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1083 transitions. [2023-11-28 20:43:47,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2023-11-28 20:43:47,792 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:47,793 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, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:47,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-28 20:43:47,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:48,000 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:48,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:48,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1382171004, now seen corresponding path program 1 times [2023-11-28 20:43:48,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:48,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951133884] [2023-11-28 20:43:48,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:48,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:48,122 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:43:48,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071031531] [2023-11-28 20:43:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:48,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:48,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:48,124 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:48,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:43:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:48,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 1633 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:43:48,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 448 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:43:49,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 448 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:43:49,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:49,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951133884] [2023-11-28 20:43:49,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:43:49,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071031531] [2023-11-28 20:43:49,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071031531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:49,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:43:49,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-28 20:43:49,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485543532] [2023-11-28 20:43:49,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:49,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-28 20:43:49,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:49,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-28 20:43:49,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:43:49,564 INFO L87 Difference]: Start difference. First operand 744 states and 1083 transitions. Second operand has 12 states, 12 states have (on average 51.833333333333336) internal successors, (622), 12 states have internal predecessors, (622), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-28 20:43:49,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:49,838 INFO L93 Difference]: Finished difference Result 1841 states and 2685 transitions. [2023-11-28 20:43:49,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:43:49,839 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 51.833333333333336) internal successors, (622), 12 states have internal predecessors, (622), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 322 [2023-11-28 20:43:49,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:49,852 INFO L225 Difference]: With dead ends: 1841 [2023-11-28 20:43:49,852 INFO L226 Difference]: Without dead ends: 1812 [2023-11-28 20:43:49,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 632 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 20:43:49,854 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 3569 mSDsluCounter, 2389 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3595 SdHoareTripleChecker+Valid, 2808 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:49,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3595 Valid, 2808 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:43:49,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2023-11-28 20:43:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1812. [2023-11-28 20:43:49,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1769 states have (on average 1.4420576596947428) internal successors, (2551), 1779 states have internal predecessors, (2551), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:43:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2631 transitions. [2023-11-28 20:43:49,936 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2631 transitions. Word has length 322 [2023-11-28 20:43:49,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:49,938 INFO L495 AbstractCegarLoop]: Abstraction has 1812 states and 2631 transitions. [2023-11-28 20:43:49,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 51.833333333333336) internal successors, (622), 12 states have internal predecessors, (622), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-28 20:43:49,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2631 transitions. [2023-11-28 20:43:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2023-11-28 20:43:49,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:49,968 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, 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] [2023-11-28 20:43:49,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:43:50,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:50,169 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:50,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:50,170 INFO L85 PathProgramCache]: Analyzing trace with hash -232404516, now seen corresponding path program 2 times [2023-11-28 20:43:50,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:50,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903298526] [2023-11-28 20:43:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:50,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:50,493 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:43:50,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360809635] [2023-11-28 20:43:50,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:43:50,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:50,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:50,497 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:50,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:44:03,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:44:03,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:44:03,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-28 20:44:03,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:03,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-28 20:44:04,112 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:44:04,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-28 20:44:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3370 backedges. 883 proven. 32 refuted. 0 times theorem prover too weak. 2455 trivial. 0 not checked. [2023-11-28 20:44:04,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:04,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:44:04,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-28 20:44:07,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:07,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903298526] [2023-11-28 20:44:07,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:44:07,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360809635] [2023-11-28 20:44:07,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360809635] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:07,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:44:07,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-28 20:44:07,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568536251] [2023-11-28 20:44:07,331 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:07,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 20:44:07,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:07,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 20:44:07,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-11-28 20:44:07,334 INFO L87 Difference]: Start difference. First operand 1812 states and 2631 transitions. Second operand has 14 states, 14 states have (on average 14.071428571428571) internal successors, (197), 14 states have internal predecessors, (197), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:44:11,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:11,323 INFO L93 Difference]: Finished difference Result 3405 states and 4937 transitions. [2023-11-28 20:44:11,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 20:44:11,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.071428571428571) internal successors, (197), 14 states have internal predecessors, (197), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 772 [2023-11-28 20:44:11,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:11,332 INFO L225 Difference]: With dead ends: 3405 [2023-11-28 20:44:11,333 INFO L226 Difference]: Without dead ends: 1849 [2023-11-28 20:44:11,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1484 GetRequests, 1454 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2023-11-28 20:44:11,336 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 1175 mSDsluCounter, 2643 mSDsCounter, 0 mSdLazyCounter, 2782 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 2793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:11,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1180 Valid, 3166 Invalid, 2793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2782 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-28 20:44:11,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2023-11-28 20:44:11,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1844. [2023-11-28 20:44:11,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1801 states have (on average 1.4369794558578568) internal successors, (2588), 1811 states have internal predecessors, (2588), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:44:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2668 transitions. [2023-11-28 20:44:11,382 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2668 transitions. Word has length 772 [2023-11-28 20:44:11,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:11,383 INFO L495 AbstractCegarLoop]: Abstraction has 1844 states and 2668 transitions. [2023-11-28 20:44:11,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.071428571428571) internal successors, (197), 14 states have internal predecessors, (197), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:44:11,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2668 transitions. [2023-11-28 20:44:11,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2023-11-28 20:44:11,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:11,392 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, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:11,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:44:11,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:11,593 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:11,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:11,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1805839138, now seen corresponding path program 1 times [2023-11-28 20:44:11,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:11,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786108146] [2023-11-28 20:44:11,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:11,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:11,884 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:44:11,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767036371] [2023-11-28 20:44:11,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:11,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:11,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:11,889 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:11,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:44:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:13,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 3773 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:44:13,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3370 backedges. 837 proven. 0 refuted. 0 times theorem prover too weak. 2533 trivial. 0 not checked. [2023-11-28 20:44:13,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:44:13,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:13,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786108146] [2023-11-28 20:44:13,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:44:13,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767036371] [2023-11-28 20:44:13,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767036371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:44:13,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:44:13,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:44:13,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667348392] [2023-11-28 20:44:13,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:44:13,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:44:13,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:13,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:44:13,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:44:13,181 INFO L87 Difference]: Start difference. First operand 1844 states and 2668 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:44:13,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:13,287 INFO L93 Difference]: Finished difference Result 3199 states and 4541 transitions. [2023-11-28 20:44:13,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:44:13,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 772 [2023-11-28 20:44:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:13,296 INFO L225 Difference]: With dead ends: 3199 [2023-11-28 20:44:13,297 INFO L226 Difference]: Without dead ends: 1362 [2023-11-28 20:44:13,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 769 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 20:44:13,301 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 78 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:13,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 562 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:44:13,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2023-11-28 20:44:13,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1362. [2023-11-28 20:44:13,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1319 states have (on average 1.3495072024260804) internal successors, (1780), 1329 states have internal predecessors, (1780), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:44:13,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1860 transitions. [2023-11-28 20:44:13,349 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1860 transitions. Word has length 772 [2023-11-28 20:44:13,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:13,349 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1860 transitions. [2023-11-28 20:44:13,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:44:13,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1860 transitions. [2023-11-28 20:44:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2023-11-28 20:44:13,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:13,362 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, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:13,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:44:13,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:13,562 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:13,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:13,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1553710704, now seen corresponding path program 1 times [2023-11-28 20:44:13,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:13,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112613384] [2023-11-28 20:44:13,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:13,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:13,851 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:44:13,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321929865] [2023-11-28 20:44:13,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:13,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:13,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:13,855 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:13,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:44:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:43,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 3776 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-28 20:44:43,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:43,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-28 20:44:43,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:44:43,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-28 20:44:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3370 backedges. 1347 proven. 137 refuted. 0 times theorem prover too weak. 1886 trivial. 0 not checked. [2023-11-28 20:44:43,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:44,461 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:44:44,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-28 20:44:50,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:50,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112613384] [2023-11-28 20:44:50,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:44:50,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321929865] [2023-11-28 20:44:50,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321929865] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:50,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:44:50,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-28 20:44:50,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21470406] [2023-11-28 20:44:50,527 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:50,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-28 20:44:50,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:50,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-28 20:44:50,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-11-28 20:44:50,530 INFO L87 Difference]: Start difference. First operand 1362 states and 1860 transitions. Second operand has 16 states, 16 states have (on average 17.0625) internal successors, (273), 16 states have internal predecessors, (273), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:44:56,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:44:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:58,341 INFO L93 Difference]: Finished difference Result 2425 states and 3324 transitions. [2023-11-28 20:44:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 20:44:58,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 17.0625) internal successors, (273), 16 states have internal predecessors, (273), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 773 [2023-11-28 20:44:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:58,348 INFO L225 Difference]: With dead ends: 2425 [2023-11-28 20:44:58,349 INFO L226 Difference]: Without dead ends: 1362 [2023-11-28 20:44:58,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1486 GetRequests, 1453 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2023-11-28 20:44:58,351 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 701 mSDsluCounter, 4295 mSDsCounter, 0 mSdLazyCounter, 3012 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 4819 SdHoareTripleChecker+Invalid, 3022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:58,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 4819 Invalid, 3022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3012 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-11-28 20:44:58,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2023-11-28 20:44:58,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1362. [2023-11-28 20:44:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1319 states have (on average 1.3487490523123578) internal successors, (1779), 1329 states have internal predecessors, (1779), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:44:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1859 transitions. [2023-11-28 20:44:58,395 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1859 transitions. Word has length 773 [2023-11-28 20:44:58,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:58,396 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1859 transitions. [2023-11-28 20:44:58,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 17.0625) internal successors, (273), 16 states have internal predecessors, (273), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:44:58,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1859 transitions. [2023-11-28 20:44:58,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2023-11-28 20:44:58,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:58,406 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, 9, 9, 9, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:58,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:44:58,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:58,627 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:58,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1822214554, now seen corresponding path program 2 times [2023-11-28 20:44:58,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:58,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766647562] [2023-11-28 20:44:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:58,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:58,892 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:44:58,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657102620] [2023-11-28 20:44:58,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:44:58,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:58,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:58,893 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:58,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:45:17,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:45:17,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:45:17,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 3777 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-28 20:45:17,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:45:18,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-28 20:45:18,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:45:18,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-28 20:45:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 1661 proven. 318 refuted. 0 times theorem prover too weak. 1392 trivial. 0 not checked. [2023-11-28 20:45:18,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:45:19,216 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:45:19,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-28 20:45:30,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:45:30,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766647562] [2023-11-28 20:45:30,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:45:30,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657102620] [2023-11-28 20:45:30,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657102620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:45:30,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:45:30,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-28 20:45:30,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618093783] [2023-11-28 20:45:30,171 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-28 20:45:30,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-28 20:45:30,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:45:30,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-28 20:45:30,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-11-28 20:45:30,173 INFO L87 Difference]: Start difference. First operand 1362 states and 1859 transitions. Second operand has 15 states, 15 states have (on average 23.266666666666666) internal successors, (349), 15 states have internal predecessors, (349), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:45:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:45:36,525 INFO L93 Difference]: Finished difference Result 2292 states and 3142 transitions. [2023-11-28 20:45:36,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 20:45:36,525 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 23.266666666666666) internal successors, (349), 15 states have internal predecessors, (349), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 774 [2023-11-28 20:45:36,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:45:36,532 INFO L225 Difference]: With dead ends: 2292 [2023-11-28 20:45:36,532 INFO L226 Difference]: Without dead ends: 1362 [2023-11-28 20:45:36,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1488 GetRequests, 1455 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2023-11-28 20:45:36,536 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 557 mSDsluCounter, 6181 mSDsCounter, 0 mSdLazyCounter, 3408 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 6938 SdHoareTripleChecker+Invalid, 3413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:45:36,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 6938 Invalid, 3413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 3408 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-11-28 20:45:36,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2023-11-28 20:45:36,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1362. [2023-11-28 20:45:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1319 states have (on average 1.3479909021986354) internal successors, (1778), 1329 states have internal predecessors, (1778), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:45:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1858 transitions. [2023-11-28 20:45:36,596 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1858 transitions. Word has length 774 [2023-11-28 20:45:36,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:45:36,597 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1858 transitions. [2023-11-28 20:45:36,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 23.266666666666666) internal successors, (349), 15 states have internal predecessors, (349), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:45:36,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1858 transitions. [2023-11-28 20:45:36,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-28 20:45:36,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:45:36,607 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, 9, 9, 9, 7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:45:36,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 20:45:36,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 20:45:36,808 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:45:36,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:36,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2037489970, now seen corresponding path program 3 times [2023-11-28 20:45:36,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:36,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427123358] [2023-11-28 20:45:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:36,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:37,052 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:45:37,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199508697] [2023-11-28 20:45:37,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:45:37,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:37,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:45:37,053 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:45:37,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:45:38,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 20:45:38,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:45:38,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-28 20:45:38,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:45:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3373 backedges. 629 proven. 0 refuted. 0 times theorem prover too weak. 2744 trivial. 0 not checked. [2023-11-28 20:45:38,102 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:45:38,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:45:38,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427123358] [2023-11-28 20:45:38,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:45:38,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199508697] [2023-11-28 20:45:38,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199508697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:45:38,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:45:38,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 20:45:38,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672847160] [2023-11-28 20:45:38,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:45:38,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:45:38,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:45:38,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:45:38,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:45:38,105 INFO L87 Difference]: Start difference. First operand 1362 states and 1858 transitions. Second operand has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:45:38,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:45:38,316 INFO L93 Difference]: Finished difference Result 2759 states and 3790 transitions. [2023-11-28 20:45:38,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 20:45:38,317 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 775 [2023-11-28 20:45:38,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:45:38,346 INFO L225 Difference]: With dead ends: 2759 [2023-11-28 20:45:38,346 INFO L226 Difference]: Without dead ends: 1432 [2023-11-28 20:45:38,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 768 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:45:38,348 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 23 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:45:38,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 926 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:45:38,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2023-11-28 20:45:38,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1411. [2023-11-28 20:45:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1368 states have (on average 1.338450292397661) internal successors, (1831), 1378 states have internal predecessors, (1831), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:45:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 1911 transitions. [2023-11-28 20:45:38,396 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 1911 transitions. Word has length 775 [2023-11-28 20:45:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:45:38,397 INFO L495 AbstractCegarLoop]: Abstraction has 1411 states and 1911 transitions. [2023-11-28 20:45:38,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:45:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 1911 transitions. [2023-11-28 20:45:38,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2023-11-28 20:45:38,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:45:38,406 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, 9, 9, 9, 7, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:45:38,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-28 20:45:38,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-28 20:45:38,607 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:45:38,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:38,608 INFO L85 PathProgramCache]: Analyzing trace with hash -19837213, now seen corresponding path program 1 times [2023-11-28 20:45:38,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:38,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792191908] [2023-11-28 20:45:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:38,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:38,833 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:45:38,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503851389] [2023-11-28 20:45:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:38,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:38,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:45:38,834 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:45:38,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 20:45:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:45:53,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 3788 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 20:45:53,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:45:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3397 backedges. 935 proven. 0 refuted. 0 times theorem prover too weak. 2462 trivial. 0 not checked. [2023-11-28 20:45:54,094 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:45:54,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:45:54,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792191908] [2023-11-28 20:45:54,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:45:54,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503851389] [2023-11-28 20:45:54,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503851389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:45:54,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:45:54,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:45:54,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805599027] [2023-11-28 20:45:54,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:45:54,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:45:54,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:45:54,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:45:54,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:45:54,097 INFO L87 Difference]: Start difference. First operand 1411 states and 1911 transitions. Second operand has 6 states, 6 states have (on average 33.666666666666664) internal successors, (202), 6 states have internal predecessors, (202), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:45:54,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:45:54,327 INFO L93 Difference]: Finished difference Result 2826 states and 3849 transitions. [2023-11-28 20:45:54,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:45:54,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 33.666666666666664) internal successors, (202), 6 states have internal predecessors, (202), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 785 [2023-11-28 20:45:54,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:45:54,336 INFO L225 Difference]: With dead ends: 2826 [2023-11-28 20:45:54,336 INFO L226 Difference]: Without dead ends: 1461 [2023-11-28 20:45:54,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 780 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 20:45:54,339 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 6 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:45:54,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 876 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:45:54,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2023-11-28 20:45:54,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1451. [2023-11-28 20:45:54,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1408 states have (on average 1.3359375) internal successors, (1881), 1418 states have internal predecessors, (1881), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:45:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 1961 transitions. [2023-11-28 20:45:54,378 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 1961 transitions. Word has length 785 [2023-11-28 20:45:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:45:54,379 INFO L495 AbstractCegarLoop]: Abstraction has 1451 states and 1961 transitions. [2023-11-28 20:45:54,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.666666666666664) internal successors, (202), 6 states have internal predecessors, (202), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:45:54,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 1961 transitions. [2023-11-28 20:45:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2023-11-28 20:45:54,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:45:54,387 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, 9, 9, 9, 7, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:45:54,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 20:45:54,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-28 20:45:54,588 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:45:54,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:54,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2004371231, now seen corresponding path program 1 times [2023-11-28 20:45:54,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:54,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313461758] [2023-11-28 20:45:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:54,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:54,877 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:45:54,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000849961] [2023-11-28 20:45:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:54,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:54,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:45:54,879 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:45:54,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 20:46:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:46:13,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 3782 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-28 20:46:13,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:46:14,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-28 20:46:14,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:46:14,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-28 20:46:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3397 backedges. 1429 proven. 1799 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2023-11-28 20:46:15,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:46:15,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:46:15,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-28 20:46:42,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:46:42,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313461758] [2023-11-28 20:46:42,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:46:42,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000849961] [2023-11-28 20:46:42,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000849961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:46:42,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:46:42,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-28 20:46:42,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44191066] [2023-11-28 20:46:42,649 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-28 20:46:42,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-28 20:46:42,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:46:42,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-28 20:46:42,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-11-28 20:46:42,652 INFO L87 Difference]: Start difference. First operand 1451 states and 1961 transitions. Second operand has 19 states, 19 states have (on average 34.63157894736842) internal successors, (658), 19 states have internal predecessors, (658), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:46:45,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:46:55,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:46:58,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:46:58,292 INFO L93 Difference]: Finished difference Result 1868 states and 2541 transitions. [2023-11-28 20:46:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-28 20:46:58,293 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 34.63157894736842) internal successors, (658), 19 states have internal predecessors, (658), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 785 [2023-11-28 20:46:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:46:58,299 INFO L225 Difference]: With dead ends: 1868 [2023-11-28 20:46:58,299 INFO L226 Difference]: Without dead ends: 1444 [2023-11-28 20:46:58,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1509 GetRequests, 1468 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2023-11-28 20:46:58,301 INFO L413 NwaCegarLoop]: 1421 mSDtfsCounter, 1108 mSDsluCounter, 15873 mSDsCounter, 0 mSdLazyCounter, 6438 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 17294 SdHoareTripleChecker+Invalid, 6446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 6438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:46:58,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 17294 Invalid, 6446 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 6438 Invalid, 0 Unknown, 0 Unchecked, 15.2s Time] [2023-11-28 20:46:58,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2023-11-28 20:46:58,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1444. [2023-11-28 20:46:58,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1401 states have (on average 1.3354746609564596) internal successors, (1871), 1411 states have internal predecessors, (1871), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:46:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 1951 transitions. [2023-11-28 20:46:58,370 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 1951 transitions. Word has length 785 [2023-11-28 20:46:58,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:46:58,371 INFO L495 AbstractCegarLoop]: Abstraction has 1444 states and 1951 transitions. [2023-11-28 20:46:58,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 34.63157894736842) internal successors, (658), 19 states have internal predecessors, (658), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:46:58,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 1951 transitions. [2023-11-28 20:46:58,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 787 [2023-11-28 20:46:58,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:46:58,382 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, 9, 9, 9, 6, 6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:46:58,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-28 20:46:58,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-28 20:46:58,605 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:46:58,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:46:58,606 INFO L85 PathProgramCache]: Analyzing trace with hash -637489990, now seen corresponding path program 2 times [2023-11-28 20:46:58,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:46:58,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459902870] [2023-11-28 20:46:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:46:58,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:46:58,868 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:46:58,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340240971] [2023-11-28 20:46:58,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:46:58,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:46:58,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:46:58,869 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:46:58,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 20:47:26,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:47:26,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:47:26,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 3781 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-28 20:47:26,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:47:26,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-28 20:47:26,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:47:26,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-28 20:47:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3397 backedges. 1836 proven. 578 refuted. 0 times theorem prover too weak. 983 trivial. 0 not checked. [2023-11-28 20:47:26,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:47:27,564 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:47:27,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-28 20:47:45,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:47:45,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459902870] [2023-11-28 20:47:45,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:47:45,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340240971] [2023-11-28 20:47:45,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340240971] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:47:45,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:47:45,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-28 20:47:45,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784063146] [2023-11-28 20:47:45,331 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-28 20:47:45,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-28 20:47:45,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:47:45,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-28 20:47:45,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2023-11-28 20:47:45,332 INFO L87 Difference]: Start difference. First operand 1444 states and 1951 transitions. Second operand has 17 states, 17 states have (on average 25.529411764705884) internal successors, (434), 17 states have internal predecessors, (434), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:47:52,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:47:54,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:47:55,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:47:55,882 INFO L93 Difference]: Finished difference Result 2286 states and 3103 transitions. [2023-11-28 20:47:55,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-28 20:47:55,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 25.529411764705884) internal successors, (434), 17 states have internal predecessors, (434), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 786 [2023-11-28 20:47:55,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:47:55,889 INFO L225 Difference]: With dead ends: 2286 [2023-11-28 20:47:55,889 INFO L226 Difference]: Without dead ends: 1437 [2023-11-28 20:47:55,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1511 GetRequests, 1475 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2023-11-28 20:47:55,891 INFO L413 NwaCegarLoop]: 863 mSDtfsCounter, 809 mSDsluCounter, 7868 mSDsCounter, 0 mSdLazyCounter, 4319 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 8731 SdHoareTripleChecker+Invalid, 4325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:47:55,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 8731 Invalid, 4325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4319 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2023-11-28 20:47:55,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2023-11-28 20:47:55,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1437. [2023-11-28 20:47:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1394 states have (on average 1.3350071736011477) internal successors, (1861), 1404 states have internal predecessors, (1861), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:47:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 1941 transitions. [2023-11-28 20:47:55,936 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 1941 transitions. Word has length 786 [2023-11-28 20:47:55,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:47:55,937 INFO L495 AbstractCegarLoop]: Abstraction has 1437 states and 1941 transitions. [2023-11-28 20:47:55,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 25.529411764705884) internal successors, (434), 17 states have internal predecessors, (434), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:47:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 1941 transitions. [2023-11-28 20:47:55,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2023-11-28 20:47:55,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:47:55,955 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, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:47:56,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 20:47:56,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 20:47:56,180 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:47:56,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:47:56,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1625201983, now seen corresponding path program 3 times [2023-11-28 20:47:56,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:47:56,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893356722] [2023-11-28 20:47:56,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:47:56,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:47:56,435 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:47:56,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666983007] [2023-11-28 20:47:56,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:47:56,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:47:56,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:47:56,437 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:47:56,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 20:47:57,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 20:47:57,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:47:57,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 20:47:57,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:47:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3400 backedges. 633 proven. 0 refuted. 0 times theorem prover too weak. 2767 trivial. 0 not checked. [2023-11-28 20:47:57,808 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:47:57,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:47:57,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893356722] [2023-11-28 20:47:57,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:47:57,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666983007] [2023-11-28 20:47:57,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666983007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:47:57,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:47:57,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:47:57,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272879360] [2023-11-28 20:47:57,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:47:57,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:47:57,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:47:57,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:47:57,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:47:57,811 INFO L87 Difference]: Start difference. First operand 1437 states and 1941 transitions. Second operand has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:47:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:47:58,133 INFO L93 Difference]: Finished difference Result 2866 states and 3890 transitions. [2023-11-28 20:47:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 20:47:58,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 787 [2023-11-28 20:47:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:47:58,142 INFO L225 Difference]: With dead ends: 2866 [2023-11-28 20:47:58,142 INFO L226 Difference]: Without dead ends: 1487 [2023-11-28 20:47:58,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 782 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:47:58,144 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 38 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:47:58,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1011 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:47:58,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2023-11-28 20:47:58,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1457. [2023-11-28 20:47:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1414 states have (on average 1.3302687411598302) internal successors, (1881), 1424 states have internal predecessors, (1881), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:47:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1961 transitions. [2023-11-28 20:47:58,179 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1961 transitions. Word has length 787 [2023-11-28 20:47:58,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:47:58,179 INFO L495 AbstractCegarLoop]: Abstraction has 1457 states and 1961 transitions. [2023-11-28 20:47:58,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:47:58,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1961 transitions. [2023-11-28 20:47:58,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-28 20:47:58,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:47:58,190 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, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:47:58,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-28 20:47:58,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 20:47:58,391 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:47:58,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:47:58,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1479284138, now seen corresponding path program 1 times [2023-11-28 20:47:58,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:47:58,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092722789] [2023-11-28 20:47:58,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:47:58,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:47:58,654 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:47:58,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137415520] [2023-11-28 20:47:58,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:47:58,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:47:58,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:47:58,656 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:47:58,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 20:48:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:48:41,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 3785 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-28 20:48:41,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:48:42,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-28 20:48:42,930 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:48:42,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-28 20:48:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3410 backedges. 403 proven. 3004 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:48:43,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:48:43,842 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:48:43,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-28 20:49:25,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:49:25,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092722789] [2023-11-28 20:49:25,174 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:49:25,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137415520] [2023-11-28 20:49:25,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137415520] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:49:25,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:49:25,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-11-28 20:49:25,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620730266] [2023-11-28 20:49:25,175 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-28 20:49:25,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-28 20:49:25,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:49:25,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-28 20:49:25,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2023-11-28 20:49:25,179 INFO L87 Difference]: Start difference. First operand 1457 states and 1961 transitions. Second operand has 23 states, 23 states have (on average 34.130434782608695) internal successors, (785), 23 states have internal predecessors, (785), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:49:41,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:49:41,827 INFO L93 Difference]: Finished difference Result 1773 states and 2395 transitions. [2023-11-28 20:49:41,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-28 20:49:41,827 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 34.130434782608695) internal successors, (785), 23 states have internal predecessors, (785), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-28 20:49:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:49:41,834 INFO L225 Difference]: With dead ends: 1773 [2023-11-28 20:49:41,834 INFO L226 Difference]: Without dead ends: 1595 [2023-11-28 20:49:41,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1475 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=419, Invalid=1933, Unknown=0, NotChecked=0, Total=2352 [2023-11-28 20:49:41,835 INFO L413 NwaCegarLoop]: 1717 mSDtfsCounter, 1540 mSDsluCounter, 23912 mSDsCounter, 0 mSdLazyCounter, 9190 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1569 SdHoareTripleChecker+Valid, 25629 SdHoareTripleChecker+Invalid, 9201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 9190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:49:41,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1569 Valid, 25629 Invalid, 9201 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 9190 Invalid, 0 Unknown, 0 Unchecked, 16.1s Time] [2023-11-28 20:49:41,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2023-11-28 20:49:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1488. [2023-11-28 20:49:41,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1445 states have (on average 1.3231833910034603) internal successors, (1912), 1455 states have internal predecessors, (1912), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:49:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 1992 transitions. [2023-11-28 20:49:41,887 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 1992 transitions. Word has length 792 [2023-11-28 20:49:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:49:41,888 INFO L495 AbstractCegarLoop]: Abstraction has 1488 states and 1992 transitions. [2023-11-28 20:49:41,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 34.130434782608695) internal successors, (785), 23 states have internal predecessors, (785), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:49:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 1992 transitions. [2023-11-28 20:49:41,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-28 20:49:41,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:49:41,898 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, 9, 9, 9, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:49:41,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-28 20:49:42,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 20:49:42,099 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:49:42,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:49:42,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1319024846, now seen corresponding path program 2 times [2023-11-28 20:49:42,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:49:42,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138969406] [2023-11-28 20:49:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:49:42,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:49:42,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:49:42,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853495236] [2023-11-28 20:49:42,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:49:42,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:49:42,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:49:42,368 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:49:42,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 20:49:56,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:49:56,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:49:56,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 3783 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-28 20:49:56,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:49:57,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-28 20:49:57,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:49:57,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-28 20:49:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3412 backedges. 1861 proven. 914 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2023-11-28 20:49:57,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:49:58,417 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:49:58,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-28 20:50:20,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:50:20,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138969406] [2023-11-28 20:50:20,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:50:20,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853495236] [2023-11-28 20:50:20,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853495236] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:50:20,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:50:20,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-28 20:50:20,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005265266] [2023-11-28 20:50:20,439 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-28 20:50:20,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-28 20:50:20,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:50:20,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-28 20:50:20,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-11-28 20:50:20,442 INFO L87 Difference]: Start difference. First operand 1488 states and 1992 transitions. Second operand has 18 states, 18 states have (on average 28.555555555555557) internal successors, (514), 18 states have internal predecessors, (514), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:50:29,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:50:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:50:31,133 INFO L93 Difference]: Finished difference Result 2227 states and 2991 transitions. [2023-11-28 20:50:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-28 20:50:31,133 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 28.555555555555557) internal successors, (514), 18 states have internal predecessors, (514), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-28 20:50:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:50:31,139 INFO L225 Difference]: With dead ends: 2227 [2023-11-28 20:50:31,139 INFO L226 Difference]: Without dead ends: 1481 [2023-11-28 20:50:31,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1484 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2023-11-28 20:50:31,142 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 1074 mSDsluCounter, 9687 mSDsCounter, 0 mSdLazyCounter, 5009 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 10726 SdHoareTripleChecker+Invalid, 5018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 5009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:50:31,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 10726 Invalid, 5018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 5009 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2023-11-28 20:50:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2023-11-28 20:50:31,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1481. [2023-11-28 20:50:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1438 states have (on average 1.3226703755215576) internal successors, (1902), 1448 states have internal predecessors, (1902), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:50:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 1982 transitions. [2023-11-28 20:50:31,176 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 1982 transitions. Word has length 792 [2023-11-28 20:50:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:50:31,177 INFO L495 AbstractCegarLoop]: Abstraction has 1481 states and 1982 transitions. [2023-11-28 20:50:31,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 28.555555555555557) internal successors, (514), 18 states have internal predecessors, (514), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:50:31,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 1982 transitions. [2023-11-28 20:50:31,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-28 20:50:31,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:50:31,189 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, 9, 9, 9, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:50:31,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-28 20:50:31,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 20:50:31,390 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:50:31,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:50:31,391 INFO L85 PathProgramCache]: Analyzing trace with hash -2014686734, now seen corresponding path program 3 times [2023-11-28 20:50:31,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:50:31,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963064900] [2023-11-28 20:50:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:50:31,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:50:31,649 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:50:31,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91928344] [2023-11-28 20:50:31,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:50:31,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:50:31,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:50:31,651 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:50:31,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 20:50:33,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 20:50:33,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:50:33,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:50:33,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:50:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3418 backedges. 641 proven. 0 refuted. 0 times theorem prover too weak. 2777 trivial. 0 not checked. [2023-11-28 20:50:33,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:50:33,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:50:33,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963064900] [2023-11-28 20:50:33,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:50:33,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91928344] [2023-11-28 20:50:33,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91928344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:50:33,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:50:33,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:50:33,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533187805] [2023-11-28 20:50:33,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:50:33,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:50:33,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:50:33,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:50:33,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:50:33,461 INFO L87 Difference]: Start difference. First operand 1481 states and 1982 transitions. Second operand has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:50:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:50:33,971 INFO L93 Difference]: Finished difference Result 2966 states and 3987 transitions. [2023-11-28 20:50:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:50:33,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-28 20:50:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:50:33,981 INFO L225 Difference]: With dead ends: 2966 [2023-11-28 20:50:33,981 INFO L226 Difference]: Without dead ends: 1541 [2023-11-28 20:50:33,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 786 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:50:33,984 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 12 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:50:33,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1000 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:50:33,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2023-11-28 20:50:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1505. [2023-11-28 20:50:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1462 states have (on average 1.3214774281805746) internal successors, (1932), 1472 states have internal predecessors, (1932), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:50:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2012 transitions. [2023-11-28 20:50:34,051 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2012 transitions. Word has length 792 [2023-11-28 20:50:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:50:34,052 INFO L495 AbstractCegarLoop]: Abstraction has 1505 states and 2012 transitions. [2023-11-28 20:50:34,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:50:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2012 transitions. [2023-11-28 20:50:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 800 [2023-11-28 20:50:34,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:50:34,063 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, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:50:34,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-28 20:50:34,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 20:50:34,265 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:50:34,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:50:34,265 INFO L85 PathProgramCache]: Analyzing trace with hash 792440225, now seen corresponding path program 1 times [2023-11-28 20:50:34,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:50:34,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935477240] [2023-11-28 20:50:34,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:50:34,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:50:34,564 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:50:34,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729603139] [2023-11-28 20:50:34,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:50:34,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:50:34,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:50:34,566 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:50:34,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-28 20:50:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:50:46,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 3802 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-28 20:50:46,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:50:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3439 backedges. 963 proven. 0 refuted. 0 times theorem prover too weak. 2476 trivial. 0 not checked. [2023-11-28 20:50:46,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:50:46,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:50:46,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935477240] [2023-11-28 20:50:46,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:50:46,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729603139] [2023-11-28 20:50:46,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729603139] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:50:46,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:50:46,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:50:46,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198422274] [2023-11-28 20:50:46,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:50:46,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:50:46,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:50:46,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:50:46,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:50:46,256 INFO L87 Difference]: Start difference. First operand 1505 states and 2012 transitions. Second operand has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:50:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:50:46,573 INFO L93 Difference]: Finished difference Result 3014 states and 4047 transitions. [2023-11-28 20:50:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:50:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 799 [2023-11-28 20:50:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:50:46,581 INFO L225 Difference]: With dead ends: 3014 [2023-11-28 20:50:46,582 INFO L226 Difference]: Without dead ends: 1565 [2023-11-28 20:50:46,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 793 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 20:50:46,584 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 11 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:50:46,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1006 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:50:46,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2023-11-28 20:50:46,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1505. [2023-11-28 20:50:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1462 states have (on average 1.3214774281805746) internal successors, (1932), 1472 states have internal predecessors, (1932), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:50:46,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2012 transitions. [2023-11-28 20:50:46,620 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2012 transitions. Word has length 799 [2023-11-28 20:50:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:50:46,620 INFO L495 AbstractCegarLoop]: Abstraction has 1505 states and 2012 transitions. [2023-11-28 20:50:46,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:50:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2012 transitions. [2023-11-28 20:50:46,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 807 [2023-11-28 20:50:46,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:50:46,627 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, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:50:46,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-28 20:50:46,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:50:46,828 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:50:46,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:50:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash 38068195, now seen corresponding path program 1 times [2023-11-28 20:50:46,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:50:46,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154400739] [2023-11-28 20:50:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:50:46,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:50:47,080 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:50:47,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510865374] [2023-11-28 20:50:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:50:47,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:50:47,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:50:47,082 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:50:47,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-28 20:50:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:50:56,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 3795 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-28 20:50:56,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:50:57,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-28 20:50:57,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:50:57,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-28 20:50:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3460 backedges. 1747 proven. 1347 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-11-28 20:50:57,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:50:58,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:50:58,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-28 20:51:28,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:51:28,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154400739] [2023-11-28 20:51:28,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:51:28,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510865374] [2023-11-28 20:51:28,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510865374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:51:28,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:51:28,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-11-28 20:51:28,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771486796] [2023-11-28 20:51:28,599 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-28 20:51:28,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-28 20:51:28,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:51:28,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 20:51:28,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-11-28 20:51:28,602 INFO L87 Difference]: Start difference. First operand 1505 states and 2012 transitions. Second operand has 20 states, 20 states have (on average 30.2) internal successors, (604), 20 states have internal predecessors, (604), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:51:42,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:51:45,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:51:45,031 INFO L93 Difference]: Finished difference Result 2106 states and 2825 transitions. [2023-11-28 20:51:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-28 20:51:45,032 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 30.2) internal successors, (604), 20 states have internal predecessors, (604), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 806 [2023-11-28 20:51:45,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:51:45,038 INFO L225 Difference]: With dead ends: 2106 [2023-11-28 20:51:45,038 INFO L226 Difference]: Without dead ends: 1502 [2023-11-28 20:51:45,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1550 GetRequests, 1509 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2023-11-28 20:51:45,040 INFO L413 NwaCegarLoop]: 1186 mSDtfsCounter, 974 mSDsluCounter, 14913 mSDsCounter, 0 mSdLazyCounter, 6805 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 16099 SdHoareTripleChecker+Invalid, 6810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:51:45,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 16099 Invalid, 6810 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5 Valid, 6805 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time] [2023-11-28 20:51:45,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2023-11-28 20:51:45,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1502. [2023-11-28 20:51:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1459 states have (on average 1.3207676490747087) internal successors, (1927), 1469 states have internal predecessors, (1927), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:51:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 2007 transitions. [2023-11-28 20:51:45,087 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 2007 transitions. Word has length 806 [2023-11-28 20:51:45,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:51:45,088 INFO L495 AbstractCegarLoop]: Abstraction has 1502 states and 2007 transitions. [2023-11-28 20:51:45,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.2) internal successors, (604), 20 states have internal predecessors, (604), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:51:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 2007 transitions. [2023-11-28 20:51:45,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 809 [2023-11-28 20:51:45,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:51:45,098 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, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:51:45,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-28 20:51:45,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:51:45,299 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:51:45,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:51:45,300 INFO L85 PathProgramCache]: Analyzing trace with hash -723431068, now seen corresponding path program 2 times [2023-11-28 20:51:45,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:51:45,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675870804] [2023-11-28 20:51:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:51:45,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:51:45,595 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:51:45,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394007593] [2023-11-28 20:51:45,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:51:45,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:51:45,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:51:45,596 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:51:45,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-28 20:52:26,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:52:26,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:52:26,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 3795 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-28 20:52:26,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:52:27,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-28 20:52:27,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:52:27,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-28 20:52:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 1011 proven. 2426 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-28 20:52:27,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:52:28,737 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:52:28,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-28 20:53:08,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:53:08,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675870804] [2023-11-28 20:53:08,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:53:08,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394007593] [2023-11-28 20:53:08,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394007593] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:53:08,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:53:08,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-28 20:53:08,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836306137] [2023-11-28 20:53:08,217 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-28 20:53:08,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-28 20:53:08,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:53:08,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-28 20:53:08,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2023-11-28 20:53:08,219 INFO L87 Difference]: Start difference. First operand 1502 states and 2007 transitions. Second operand has 22 states, 22 states have (on average 34.59090909090909) internal successors, (761), 22 states have internal predecessors, (761), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:53:20,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:53:22,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:53:25,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:53:28,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:53:28,029 INFO L93 Difference]: Finished difference Result 1814 states and 2433 transitions. [2023-11-28 20:53:28,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-28 20:53:28,029 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 34.59090909090909) internal successors, (761), 22 states have internal predecessors, (761), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 808 [2023-11-28 20:53:28,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:53:28,036 INFO L225 Difference]: With dead ends: 1814 [2023-11-28 20:53:28,036 INFO L226 Difference]: Without dead ends: 1499 [2023-11-28 20:53:28,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1554 GetRequests, 1509 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2023-11-28 20:53:28,038 INFO L413 NwaCegarLoop]: 1538 mSDtfsCounter, 1332 mSDsluCounter, 21130 mSDsCounter, 0 mSdLazyCounter, 8515 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1358 SdHoareTripleChecker+Valid, 22668 SdHoareTripleChecker+Invalid, 8524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 8515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:53:28,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1358 Valid, 22668 Invalid, 8524 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 8515 Invalid, 0 Unknown, 0 Unchecked, 19.2s Time] [2023-11-28 20:53:28,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2023-11-28 20:53:28,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1499. [2023-11-28 20:53:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1456 states have (on average 1.320054945054945) internal successors, (1922), 1466 states have internal predecessors, (1922), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:53:28,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 2002 transitions. [2023-11-28 20:53:28,069 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 2002 transitions. Word has length 808 [2023-11-28 20:53:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:53:28,070 INFO L495 AbstractCegarLoop]: Abstraction has 1499 states and 2002 transitions. [2023-11-28 20:53:28,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 34.59090909090909) internal successors, (761), 22 states have internal predecessors, (761), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:53:28,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 2002 transitions. [2023-11-28 20:53:28,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-11-28 20:53:28,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:53:28,077 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, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:53:28,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-28 20:53:28,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-28 20:53:28,278 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:53:28,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:53:28,279 INFO L85 PathProgramCache]: Analyzing trace with hash -591292827, now seen corresponding path program 3 times [2023-11-28 20:53:28,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:53:28,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215068624] [2023-11-28 20:53:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:53:28,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:53:28,589 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:53:28,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645968245] [2023-11-28 20:53:28,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:53:28,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:53:28,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:53:28,590 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:53:28,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-28 20:53:30,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 20:53:30,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:53:30,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:53:30,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:53:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3514 backedges. 411 proven. 0 refuted. 0 times theorem prover too weak. 3103 trivial. 0 not checked. [2023-11-28 20:53:30,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:53:30,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:53:30,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215068624] [2023-11-28 20:53:30,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:53:30,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645968245] [2023-11-28 20:53:30,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645968245] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:53:30,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:53:30,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:53:30,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279164647] [2023-11-28 20:53:30,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:53:30,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:53:30,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:53:30,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:53:30,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:53:30,408 INFO L87 Difference]: Start difference. First operand 1499 states and 2002 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:53:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:53:30,498 INFO L93 Difference]: Finished difference Result 2999 states and 4007 transitions. [2023-11-28 20:53:30,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:53:30,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 810 [2023-11-28 20:53:30,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:53:30,504 INFO L225 Difference]: With dead ends: 2999 [2023-11-28 20:53:30,504 INFO L226 Difference]: Without dead ends: 1549 [2023-11-28 20:53:30,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:53:30,507 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 6 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:53:30,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 650 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:53:30,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2023-11-28 20:53:30,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 1489. [2023-11-28 20:53:30,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1446 states have (on average 1.3153526970954357) internal successors, (1902), 1456 states have internal predecessors, (1902), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:53:30,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 1982 transitions. [2023-11-28 20:53:30,558 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 1982 transitions. Word has length 810 [2023-11-28 20:53:30,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:53:30,558 INFO L495 AbstractCegarLoop]: Abstraction has 1489 states and 1982 transitions. [2023-11-28 20:53:30,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:53:30,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 1982 transitions. [2023-11-28 20:53:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-11-28 20:53:30,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:53:30,582 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, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:53:30,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-28 20:53:30,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-28 20:53:30,783 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:53:30,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:53:30,784 INFO L85 PathProgramCache]: Analyzing trace with hash -668494689, now seen corresponding path program 1 times [2023-11-28 20:53:30,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:53:30,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375585347] [2023-11-28 20:53:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:53:30,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:53:31,059 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:53:31,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644359989] [2023-11-28 20:53:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:53:31,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:53:31,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:53:31,061 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:53:31,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-28 20:53:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:53:55,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 3795 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-28 20:53:55,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:53:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3532 backedges. 1531 proven. 0 refuted. 0 times theorem prover too weak. 2001 trivial. 0 not checked. [2023-11-28 20:53:57,694 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:53:57,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:53:57,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375585347] [2023-11-28 20:53:57,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:53:57,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644359989] [2023-11-28 20:53:57,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644359989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:53:57,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:53:57,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-28 20:53:57,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086243599] [2023-11-28 20:53:57,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:53:57,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-28 20:53:57,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:53:57,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-28 20:53:57,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:53:57,697 INFO L87 Difference]: Start difference. First operand 1489 states and 1982 transitions. Second operand has 11 states, 11 states have (on average 19.636363636363637) internal successors, (216), 11 states have internal predecessors, (216), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:53:58,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:53:58,921 INFO L93 Difference]: Finished difference Result 2973 states and 3958 transitions. [2023-11-28 20:53:58,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:53:58,922 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 19.636363636363637) internal successors, (216), 11 states have internal predecessors, (216), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 810 [2023-11-28 20:53:58,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:53:58,924 INFO L225 Difference]: With dead ends: 2973 [2023-11-28 20:53:58,924 INFO L226 Difference]: Without dead ends: 1539 [2023-11-28 20:53:58,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 800 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:53:58,926 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 10 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:53:58,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1608 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-28 20:53:58,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2023-11-28 20:53:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1519. [2023-11-28 20:53:58,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1476 states have (on average 1.3089430894308942) internal successors, (1932), 1486 states have internal predecessors, (1932), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:53:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 2012 transitions. [2023-11-28 20:53:58,957 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 2012 transitions. Word has length 810 [2023-11-28 20:53:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:53:58,958 INFO L495 AbstractCegarLoop]: Abstraction has 1519 states and 2012 transitions. [2023-11-28 20:53:58,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.636363636363637) internal successors, (216), 11 states have internal predecessors, (216), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:53:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 2012 transitions. [2023-11-28 20:53:58,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-11-28 20:53:58,964 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:53:58,965 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, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:53:59,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-28 20:53:59,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:53:59,165 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:53:59,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:53:59,166 INFO L85 PathProgramCache]: Analyzing trace with hash 89310823, now seen corresponding path program 1 times [2023-11-28 20:53:59,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:53:59,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370496990] [2023-11-28 20:53:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:53:59,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:53:59,448 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:53:59,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931945598] [2023-11-28 20:53:59,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:53:59,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:53:59,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:53:59,449 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:53:59,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-28 20:54:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:54:19,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-28 20:54:19,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:54:19,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-28 20:54:19,443 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:54:19,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 23 [2023-11-28 20:54:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3532 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2023-11-28 20:54:19,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:54:19,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:54:19,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370496990] [2023-11-28 20:54:19,581 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:54:19,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931945598] [2023-11-28 20:54:19,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931945598] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:54:19,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:54:19,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-28 20:54:19,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749438037] [2023-11-28 20:54:19,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:54:19,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-28 20:54:19,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:54:19,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-28 20:54:19,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:54:19,584 INFO L87 Difference]: Start difference. First operand 1519 states and 2012 transitions. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 11 states have internal predecessors, (129), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:54:22,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:54:22,045 INFO L93 Difference]: Finished difference Result 2991 states and 3971 transitions. [2023-11-28 20:54:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-28 20:54:22,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 11 states have internal predecessors, (129), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 810 [2023-11-28 20:54:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:54:22,053 INFO L225 Difference]: With dead ends: 2991 [2023-11-28 20:54:22,053 INFO L226 Difference]: Without dead ends: 1516 [2023-11-28 20:54:22,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 816 GetRequests, 799 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-28 20:54:22,056 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 431 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1718 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:54:22,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 1718 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-28 20:54:22,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2023-11-28 20:54:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1516. [2023-11-28 20:54:22,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1473 states have (on average 1.308214528173795) internal successors, (1927), 1483 states have internal predecessors, (1927), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-28 20:54:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 2007 transitions. [2023-11-28 20:54:22,107 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 2007 transitions. Word has length 810 [2023-11-28 20:54:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:54:22,107 INFO L495 AbstractCegarLoop]: Abstraction has 1516 states and 2007 transitions. [2023-11-28 20:54:22,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 11 states have internal predecessors, (129), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:54:22,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 2007 transitions. [2023-11-28 20:54:22,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-28 20:54:22,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:54:22,116 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, 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] [2023-11-28 20:54:22,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-28 20:54:22,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-28 20:54:22,317 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:54:22,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:54:22,318 INFO L85 PathProgramCache]: Analyzing trace with hash 953985600, now seen corresponding path program 1 times [2023-11-28 20:54:22,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:54:22,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377802433] [2023-11-28 20:54:22,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:54:22,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:54:22,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:54:22,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908270588] [2023-11-28 20:54:22,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:54:22,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:54:22,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:54:22,603 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:54:22,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-28 20:55:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:55:03,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-28 20:55:03,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:55:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3550 backedges. 534 proven. 0 refuted. 0 times theorem prover too weak. 3016 trivial. 0 not checked. [2023-11-28 20:55:03,112 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:55:03,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:55:03,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377802433] [2023-11-28 20:55:03,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:55:03,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908270588] [2023-11-28 20:55:03,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908270588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:55:03,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:55:03,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:55:03,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491606399] [2023-11-28 20:55:03,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:55:03,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:55:03,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:55:03,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:55:03,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:55:03,114 INFO L87 Difference]: Start difference. First operand 1516 states and 2007 transitions. Second operand has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:55:03,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:55:03,186 INFO L93 Difference]: Finished difference Result 2945 states and 3930 transitions. [2023-11-28 20:55:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:55:03,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 812 [2023-11-28 20:55:03,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:55:03,193 INFO L225 Difference]: With dead ends: 2945 [2023-11-28 20:55:03,193 INFO L226 Difference]: Without dead ends: 1518 [2023-11-28 20:55:03,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 809 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 20:55:03,196 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 1 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:55:03,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 680 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:55:03,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2023-11-28 20:55:03,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1518. [2023-11-28 20:55:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1474 states have (on average 1.308683853459973) internal successors, (1929), 1485 states have internal predecessors, (1929), 40 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (50), 31 states have call predecessors, (50), 40 states have call successors, (50) [2023-11-28 20:55:03,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2019 transitions. [2023-11-28 20:55:03,275 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2019 transitions. Word has length 812 [2023-11-28 20:55:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:55:03,275 INFO L495 AbstractCegarLoop]: Abstraction has 1518 states and 2019 transitions. [2023-11-28 20:55:03,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:55:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2019 transitions. [2023-11-28 20:55:03,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2023-11-28 20:55:03,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:55:03,285 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, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:55:03,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-28 20:55:03,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-28 20:55:03,485 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:55:03,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:55:03,486 INFO L85 PathProgramCache]: Analyzing trace with hash -176131174, now seen corresponding path program 1 times [2023-11-28 20:55:03,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:55:03,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890297458] [2023-11-28 20:55:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:55:03,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:55:03,798 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:55:03,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539003507] [2023-11-28 20:55:03,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:55:03,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:55:03,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:55:03,800 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:55:03,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4fb469c-2ef3-4e2f-af4b-72853d7a6dce/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-28 20:56:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:56:21,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 3805 conjuncts, 129 conjunts are in the unsatisfiable core [2023-11-28 20:56:21,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:56:21,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-28 20:56:21,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-28 20:56:21,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-28 20:56:21,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:56:21,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-28 20:56:21,862 INFO L349 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2023-11-28 20:56:21,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2023-11-28 20:56:21,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-28 20:56:21,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-28 20:56:22,070 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-28 20:56:22,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-28 20:56:22,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-28 20:56:26,711 INFO L224 Elim1Store]: Index analysis took 205 ms