./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/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_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/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_856b3bbb-d025-483a-a3ee-23d1f2687445/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 08dbe1d8baf218c90d79c7aa96b8d857526ff0e474f0acb076b8cd9ca4d11ff2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:02:56,374 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:02:56,439 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:02:56,443 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:02:56,443 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:02:56,466 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:02:56,466 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:02:56,467 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:02:56,468 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:02:56,468 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:02:56,469 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:02:56,469 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:02:56,470 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:02:56,470 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:02:56,471 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:02:56,471 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:02:56,472 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:02:56,472 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:02:56,473 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:02:56,473 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:02:56,473 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:02:56,474 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:02:56,474 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:02:56,475 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:02:56,475 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:02:56,475 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:02:56,476 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:02:56,476 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:02:56,477 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:02:56,477 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:02:56,477 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:02:56,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:02:56,490 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:02:56,490 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:02:56,490 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:02:56,491 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:02:56,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:02:56,491 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:02:56,491 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:02:56,491 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:02:56,492 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:02:56,492 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:02:56,492 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_856b3bbb-d025-483a-a3ee-23d1f2687445/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 08dbe1d8baf218c90d79c7aa96b8d857526ff0e474f0acb076b8cd9ca4d11ff2 [2023-11-29 00:02:56,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:02:56,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:02:56,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:02:56,722 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:02:56,723 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:02:56,724 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i [2023-11-29 00:02:59,501 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:02:59,754 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:02:59,755 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i [2023-11-29 00:02:59,772 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/data/de536d0dd/c7022e5668bf4ab886cad01bb579af31/FLAGbb9c8de5f [2023-11-29 00:02:59,787 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/data/de536d0dd/c7022e5668bf4ab886cad01bb579af31 [2023-11-29 00:02:59,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:02:59,792 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:02:59,793 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:02:59,793 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:02:59,798 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:02:59,799 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:02:59" (1/1) ... [2023-11-29 00:02:59,800 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b7f6842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:59, skipping insertion in model container [2023-11-29 00:02:59,800 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:02:59" (1/1) ... [2023-11-29 00:02:59,863 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:03:00,243 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_856b3bbb-d025-483a-a3ee-23d1f2687445/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i[33021,33034] [2023-11-29 00:03:00,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:03:00,362 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:03:00,391 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_856b3bbb-d025-483a-a3ee-23d1f2687445/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i[33021,33034] [2023-11-29 00:03:00,446 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:03:00,485 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:03:00,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:00 WrapperNode [2023-11-29 00:03:00,485 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:03:00,486 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:03:00,487 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:03:00,487 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:03:00,494 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:00" (1/1) ... [2023-11-29 00:03:00,525 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:00" (1/1) ... [2023-11-29 00:03:00,616 INFO L138 Inliner]: procedures = 177, calls = 349, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1492 [2023-11-29 00:03:00,617 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:03:00,618 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:03:00,618 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:03:00,619 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:03:00,630 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:00" (1/1) ... [2023-11-29 00:03:00,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:00" (1/1) ... [2023-11-29 00:03:00,657 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:00" (1/1) ... [2023-11-29 00:03:00,751 INFO L175 MemorySlicer]: Split 319 memory accesses to 4 slices as follows [2, 5, 5, 307]. 96 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 84 writes are split as follows [0, 1, 1, 82]. [2023-11-29 00:03:00,751 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:00" (1/1) ... [2023-11-29 00:03:00,751 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:00" (1/1) ... [2023-11-29 00:03:00,802 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:00" (1/1) ... [2023-11-29 00:03:00,817 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:00" (1/1) ... [2023-11-29 00:03:00,824 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:00" (1/1) ... [2023-11-29 00:03:00,834 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:00" (1/1) ... [2023-11-29 00:03:00,846 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:03:00,847 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:03:00,848 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:03:00,848 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:03:00,849 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:00" (1/1) ... [2023-11-29 00:03:00,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:03:00,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:00,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:03:00,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:03:00,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:03:00,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:03:00,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:03:00,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 00:03:00,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 00:03:00,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 00:03:00,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:03:00,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:03:00,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:03:00,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 00:03:00,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-29 00:03:00,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-29 00:03:00,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-29 00:03:00,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-29 00:03:00,921 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-29 00:03:00,921 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-29 00:03:00,921 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-29 00:03:00,922 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-29 00:03:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:03:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:03:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:03:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 00:03:00,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 00:03:00,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 00:03:00,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-29 00:03:00,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 00:03:00,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 00:03:00,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 00:03:00,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-29 00:03:00,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:03:00,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:03:00,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:03:00,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:03:00,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:03:00,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:03:00,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:03:01,145 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:03:01,147 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:03:02,577 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:03:02,625 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:03:02,625 INFO L309 CfgBuilder]: Removed 60 assume(true) statements. [2023-11-29 00:03:02,626 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:03:02 BoogieIcfgContainer [2023-11-29 00:03:02,626 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:03:02,628 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:03:02,628 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:03:02,632 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:03:02,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:02:59" (1/3) ... [2023-11-29 00:03:02,632 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c891d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:03:02, skipping insertion in model container [2023-11-29 00:03:02,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:03:00" (2/3) ... [2023-11-29 00:03:02,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c891d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:03:02, skipping insertion in model container [2023-11-29 00:03:02,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:03:02" (3/3) ... [2023-11-29 00:03:02,634 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_test4-1.i [2023-11-29 00:03:02,653 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:03:02,653 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:03:02,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:03:02,720 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;@316c55b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:03:02,720 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:03:02,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 375 states, 355 states have (on average 1.704225352112676) internal successors, (605), 366 states have internal predecessors, (605), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 00:03:02,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 00:03:02,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:02,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:02,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:02,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:02,740 INFO L85 PathProgramCache]: Analyzing trace with hash -406387259, now seen corresponding path program 1 times [2023-11-29 00:03:02,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:02,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560856507] [2023-11-29 00:03:02,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:02,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:02,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:02,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560856507] [2023-11-29 00:03:02,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560856507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:03:02,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:03:02,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:03:02,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949795971] [2023-11-29 00:03:02,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:03:02,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:03:02,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:02,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:03:02,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:03:02,979 INFO L87 Difference]: Start difference. First operand has 375 states, 355 states have (on average 1.704225352112676) internal successors, (605), 366 states have internal predecessors, (605), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) 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) [2023-11-29 00:03:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:03,132 INFO L93 Difference]: Finished difference Result 1089 states and 1864 transitions. [2023-11-29 00:03:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:03:03,135 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 [2023-11-29 00:03:03,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:03,154 INFO L225 Difference]: With dead ends: 1089 [2023-11-29 00:03:03,154 INFO L226 Difference]: Without dead ends: 713 [2023-11-29 00:03:03,159 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 [2023-11-29 00:03:03,162 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 501 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 1172 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 [2023-11-29 00:03:03,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 1172 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:03:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2023-11-29 00:03:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 374. [2023-11-29 00:03:03,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 355 states have (on average 1.5098591549295775) internal successors, (536), 365 states have internal predecessors, (536), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 00:03:03,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 568 transitions. [2023-11-29 00:03:03,235 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 568 transitions. Word has length 9 [2023-11-29 00:03:03,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:03,235 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 568 transitions. [2023-11-29 00:03:03,236 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) [2023-11-29 00:03:03,236 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 568 transitions. [2023-11-29 00:03:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-29 00:03:03,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:03,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:03,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:03:03,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:03,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:03,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1207065578, now seen corresponding path program 1 times [2023-11-29 00:03:03,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:03,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205406309] [2023-11-29 00:03:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:03,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:03,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:03,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026322553] [2023-11-29 00:03:03,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:03,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:03,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:03,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:03,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:03:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:03,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:03:03,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:03,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:03:03,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:03,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205406309] [2023-11-29 00:03:03,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:03,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026322553] [2023-11-29 00:03:03,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026322553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:03:03,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:03:03,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:03:03,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508984863] [2023-11-29 00:03:03,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:03:03,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:03:03,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:03,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:03:03,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:03:03,877 INFO L87 Difference]: Start difference. First operand 374 states and 568 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:03,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:03,992 INFO L93 Difference]: Finished difference Result 767 states and 1165 transitions. [2023-11-29 00:03:03,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:03:03,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 155 [2023-11-29 00:03:03,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:03,996 INFO L225 Difference]: With dead ends: 767 [2023-11-29 00:03:03,996 INFO L226 Difference]: Without dead ends: 395 [2023-11-29 00:03:03,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:03:03,998 INFO L413 NwaCegarLoop]: 544 mSDtfsCounter, 9 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:03,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1074 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:03:04,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-11-29 00:03:04,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 394. [2023-11-29 00:03:04,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 375 states have (on average 1.4826666666666666) internal successors, (556), 385 states have internal predecessors, (556), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 00:03:04,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 588 transitions. [2023-11-29 00:03:04,025 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 588 transitions. Word has length 155 [2023-11-29 00:03:04,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:04,025 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 588 transitions. [2023-11-29 00:03:04,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:04,026 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 588 transitions. [2023-11-29 00:03:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-29 00:03:04,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:04,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:04,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:03:04,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:04,231 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:04,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:04,232 INFO L85 PathProgramCache]: Analyzing trace with hash -952018516, now seen corresponding path program 1 times [2023-11-29 00:03:04,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:04,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290004849] [2023-11-29 00:03:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:04,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:04,323 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:04,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169034969] [2023-11-29 00:03:04,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:04,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:04,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:04,325 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:04,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:03:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:04,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:03:04,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:04,761 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:03:04,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:04,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290004849] [2023-11-29 00:03:04,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:04,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169034969] [2023-11-29 00:03:04,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169034969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:03:04,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:03:04,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:03:04,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689927939] [2023-11-29 00:03:04,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:03:04,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:03:04,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:04,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:03:04,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:03:04,765 INFO L87 Difference]: Start difference. First operand 394 states and 588 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:04,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:04,853 INFO L93 Difference]: Finished difference Result 807 states and 1205 transitions. [2023-11-29 00:03:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:03:04,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 155 [2023-11-29 00:03:04,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:04,857 INFO L225 Difference]: With dead ends: 807 [2023-11-29 00:03:04,857 INFO L226 Difference]: Without dead ends: 415 [2023-11-29 00:03:04,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:03:04,860 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 8 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:04,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1076 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:03:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2023-11-29 00:03:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 414. [2023-11-29 00:03:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 395 states have (on average 1.4582278481012658) internal successors, (576), 405 states have internal predecessors, (576), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 00:03:04,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 608 transitions. [2023-11-29 00:03:04,878 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 608 transitions. Word has length 155 [2023-11-29 00:03:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:04,879 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 608 transitions. [2023-11-29 00:03:04,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:04,879 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 608 transitions. [2023-11-29 00:03:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-29 00:03:04,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:04,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:04,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 00:03:05,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:05,087 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:05,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:05,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1381374122, now seen corresponding path program 1 times [2023-11-29 00:03:05,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:05,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775102268] [2023-11-29 00:03:05,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:05,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:05,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:05,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917788157] [2023-11-29 00:03:05,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:05,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:05,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:05,177 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:05,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:03:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:05,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:03:05,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:05,619 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:03:05,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:05,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775102268] [2023-11-29 00:03:05,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:05,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917788157] [2023-11-29 00:03:05,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917788157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:03:05,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:03:05,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:03:05,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510709489] [2023-11-29 00:03:05,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:03:05,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:03:05,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:05,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:03:05,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:03:05,623 INFO L87 Difference]: Start difference. First operand 414 states and 608 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:05,713 INFO L93 Difference]: Finished difference Result 813 states and 1201 transitions. [2023-11-29 00:03:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:03:05,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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 155 [2023-11-29 00:03:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:05,717 INFO L225 Difference]: With dead ends: 813 [2023-11-29 00:03:05,717 INFO L226 Difference]: Without dead ends: 401 [2023-11-29 00:03:05,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:03:05,719 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 165 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:05,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1459 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:03:05,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-11-29 00:03:05,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 400. [2023-11-29 00:03:05,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 381 states have (on average 1.4566929133858268) internal successors, (555), 391 states have internal predecessors, (555), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 00:03:05,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 587 transitions. [2023-11-29 00:03:05,736 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 587 transitions. Word has length 155 [2023-11-29 00:03:05,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:05,736 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 587 transitions. [2023-11-29 00:03:05,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:05,737 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 587 transitions. [2023-11-29 00:03:05,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-29 00:03:05,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:05,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:05,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:03:05,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:05,941 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:05,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:05,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1226195932, now seen corresponding path program 1 times [2023-11-29 00:03:05,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:05,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767790607] [2023-11-29 00:03:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:05,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:06,004 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:06,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070276842] [2023-11-29 00:03:06,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:06,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:06,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:06,006 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:06,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:03:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:06,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:03:06,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:06,473 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:03:06,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:06,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767790607] [2023-11-29 00:03:06,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:06,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070276842] [2023-11-29 00:03:06,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070276842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:03:06,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:03:06,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:03:06,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533598600] [2023-11-29 00:03:06,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:03:06,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:03:06,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:06,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:03:06,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:03:06,477 INFO L87 Difference]: Start difference. First operand 400 states and 587 transitions. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:06,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:06,564 INFO L93 Difference]: Finished difference Result 785 states and 1159 transitions. [2023-11-29 00:03:06,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:03:06,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 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 155 [2023-11-29 00:03:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:06,569 INFO L225 Difference]: With dead ends: 785 [2023-11-29 00:03:06,569 INFO L226 Difference]: Without dead ends: 387 [2023-11-29 00:03:06,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:03:06,571 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 169 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:06,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 1438 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:03:06,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-11-29 00:03:06,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 386. [2023-11-29 00:03:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 367 states have (on average 1.4550408719346049) internal successors, (534), 377 states have internal predecessors, (534), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 00:03:06,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 566 transitions. [2023-11-29 00:03:06,585 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 566 transitions. Word has length 155 [2023-11-29 00:03:06,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:06,585 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 566 transitions. [2023-11-29 00:03:06,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 566 transitions. [2023-11-29 00:03:06,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-29 00:03:06,587 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:06,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:06,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 00:03:06,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:06,788 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:06,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:06,789 INFO L85 PathProgramCache]: Analyzing trace with hash 791988330, now seen corresponding path program 1 times [2023-11-29 00:03:06,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:06,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470512532] [2023-11-29 00:03:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:06,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:06,858 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:06,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262963564] [2023-11-29 00:03:06,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:06,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:06,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:06,860 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:06,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:03:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:07,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:03:07,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:07,243 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:03:07,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:07,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470512532] [2023-11-29 00:03:07,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:07,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262963564] [2023-11-29 00:03:07,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262963564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:03:07,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:03:07,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:03:07,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707289445] [2023-11-29 00:03:07,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:03:07,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:03:07,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:07,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:03:07,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:03:07,246 INFO L87 Difference]: Start difference. First operand 386 states and 566 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:07,329 INFO L93 Difference]: Finished difference Result 725 states and 1055 transitions. [2023-11-29 00:03:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:03:07,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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 155 [2023-11-29 00:03:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:07,333 INFO L225 Difference]: With dead ends: 725 [2023-11-29 00:03:07,333 INFO L226 Difference]: Without dead ends: 341 [2023-11-29 00:03:07,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:03:07,335 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 78 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1306 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 [2023-11-29 00:03:07,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1306 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:03:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-11-29 00:03:07,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2023-11-29 00:03:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 322 states have (on average 1.4192546583850931) internal successors, (457), 332 states have internal predecessors, (457), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 00:03:07,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 489 transitions. [2023-11-29 00:03:07,348 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 489 transitions. Word has length 155 [2023-11-29 00:03:07,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:07,349 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 489 transitions. [2023-11-29 00:03:07,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:07,349 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 489 transitions. [2023-11-29 00:03:07,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-29 00:03:07,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:07,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:07,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:03:07,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 00:03:07,552 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:07,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:07,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1169586328, now seen corresponding path program 1 times [2023-11-29 00:03:07,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:07,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473504176] [2023-11-29 00:03:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:07,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:07,618 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:07,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790436049] [2023-11-29 00:03:07,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:07,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:07,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:07,620 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:07,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:03:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:08,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:03:08,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:08,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:08,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:08,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473504176] [2023-11-29 00:03:08,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:08,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790436049] [2023-11-29 00:03:08,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790436049] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:08,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:03:08,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-29 00:03:08,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780688497] [2023-11-29 00:03:08,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:08,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:03:08,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:08,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:03:08,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:03:08,455 INFO L87 Difference]: Start difference. First operand 341 states and 489 transitions. Second operand has 6 states, 6 states have (on average 50.333333333333336) internal successors, (302), 5 states have internal predecessors, (302), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:08,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:08,632 INFO L93 Difference]: Finished difference Result 1291 states and 1845 transitions. [2023-11-29 00:03:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:03:08,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 50.333333333333336) internal successors, (302), 5 states have internal predecessors, (302), 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 155 [2023-11-29 00:03:08,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:08,641 INFO L225 Difference]: With dead ends: 1291 [2023-11-29 00:03:08,641 INFO L226 Difference]: Without dead ends: 1262 [2023-11-29 00:03:08,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:03:08,642 INFO L413 NwaCegarLoop]: 688 mSDtfsCounter, 2544 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2568 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:08,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2568 Valid, 1987 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:03:08,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2023-11-29 00:03:08,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1262. [2023-11-29 00:03:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1225 states have (on average 1.4089795918367347) internal successors, (1726), 1235 states have internal predecessors, (1726), 34 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-29 00:03:08,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 1794 transitions. [2023-11-29 00:03:08,690 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 1794 transitions. Word has length 155 [2023-11-29 00:03:08,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:08,690 INFO L495 AbstractCegarLoop]: Abstraction has 1262 states and 1794 transitions. [2023-11-29 00:03:08,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 50.333333333333336) internal successors, (302), 5 states have internal predecessors, (302), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 1794 transitions. [2023-11-29 00:03:08,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2023-11-29 00:03:08,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:08,707 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:08,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:03:08,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 00:03:08,908 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:08,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:08,908 INFO L85 PathProgramCache]: Analyzing trace with hash 664706001, now seen corresponding path program 2 times [2023-11-29 00:03:08,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:08,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293317118] [2023-11-29 00:03:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:08,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:09,163 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:09,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097332283] [2023-11-29 00:03:09,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:03:09,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:09,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:09,181 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:09,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:03:09,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 00:03:09,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:03:09,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:03:09,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2023-11-29 00:03:11,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:03:11,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:11,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293317118] [2023-11-29 00:03:11,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:11,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097332283] [2023-11-29 00:03:11,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097332283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:03:11,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:03:11,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:03:11,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547619345] [2023-11-29 00:03:11,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:03:11,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:03:11,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:11,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:03:11,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:03:11,504 INFO L87 Difference]: Start difference. First operand 1262 states and 1794 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:11,892 INFO L93 Difference]: Finished difference Result 2265 states and 3219 transitions. [2023-11-29 00:03:11,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:03:11,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 593 [2023-11-29 00:03:11,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:11,900 INFO L225 Difference]: With dead ends: 2265 [2023-11-29 00:03:11,900 INFO L226 Difference]: Without dead ends: 1260 [2023-11-29 00:03:11,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:03:11,903 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 223 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:11,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 1359 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:03:11,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2023-11-29 00:03:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1260. [2023-11-29 00:03:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1223 states have (on average 1.4088307440719543) internal successors, (1723), 1233 states have internal predecessors, (1723), 34 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-29 00:03:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1791 transitions. [2023-11-29 00:03:11,947 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1791 transitions. Word has length 593 [2023-11-29 00:03:11,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:11,948 INFO L495 AbstractCegarLoop]: Abstraction has 1260 states and 1791 transitions. [2023-11-29 00:03:11,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:11,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1791 transitions. [2023-11-29 00:03:11,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2023-11-29 00:03:11,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:11,966 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-11-29 00:03:11,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:03:12,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:12,167 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:12,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:12,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2075359618, now seen corresponding path program 1 times [2023-11-29 00:03:12,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:12,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325404269] [2023-11-29 00:03:12,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:12,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:12,398 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:12,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90800840] [2023-11-29 00:03:12,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:12,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:12,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:12,404 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:12,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:03:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:13,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 2913 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:03:13,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:03:13,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:03:14,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:14,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325404269] [2023-11-29 00:03:14,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:14,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90800840] [2023-11-29 00:03:14,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90800840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:14,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:03:14,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 00:03:14,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025968161] [2023-11-29 00:03:14,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:14,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:03:14,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:14,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:03:14,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:03:14,597 INFO L87 Difference]: Start difference. First operand 1260 states and 1791 transitions. Second operand has 12 states, 12 states have (on average 99.16666666666667) internal successors, (1190), 12 states have internal predecessors, (1190), 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) [2023-11-29 00:03:14,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:14,980 INFO L93 Difference]: Finished difference Result 3131 states and 4455 transitions. [2023-11-29 00:03:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:03:14,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 99.16666666666667) internal successors, (1190), 12 states have internal predecessors, (1190), 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 606 [2023-11-29 00:03:14,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:14,997 INFO L225 Difference]: With dead ends: 3131 [2023-11-29 00:03:14,997 INFO L226 Difference]: Without dead ends: 3102 [2023-11-29 00:03:14,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1210 GetRequests, 1200 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:03:14,999 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 6308 mSDsluCounter, 4405 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6364 SdHoareTripleChecker+Valid, 4961 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:15,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6364 Valid, 4961 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:03:15,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2023-11-29 00:03:15,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 3102. [2023-11-29 00:03:15,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3029 states have (on average 1.4067348960052823) internal successors, (4261), 3039 states have internal predecessors, (4261), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 61 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-29 00:03:15,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 4401 transitions. [2023-11-29 00:03:15,092 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 4401 transitions. Word has length 606 [2023-11-29 00:03:15,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:15,094 INFO L495 AbstractCegarLoop]: Abstraction has 3102 states and 4401 transitions. [2023-11-29 00:03:15,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 99.16666666666667) internal successors, (1190), 12 states have internal predecessors, (1190), 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) [2023-11-29 00:03:15,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 4401 transitions. [2023-11-29 00:03:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1483 [2023-11-29 00:03:15,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:15,123 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:15,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:03:15,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:15,325 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:15,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:15,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1192377744, now seen corresponding path program 2 times [2023-11-29 00:03:15,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:15,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052733338] [2023-11-29 00:03:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:15,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:15,845 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:15,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610954898] [2023-11-29 00:03:15,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:03:15,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:15,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:15,849 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:15,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:03:17,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:03:17,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:03:18,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 6969 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:03:18,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6565 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 6069 trivial. 0 not checked. [2023-11-29 00:03:18,212 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:03:18,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:18,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052733338] [2023-11-29 00:03:18,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:18,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610954898] [2023-11-29 00:03:18,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610954898] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:03:18,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:03:18,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:03:18,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185431021] [2023-11-29 00:03:18,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:03:18,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:03:18,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:18,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:03:18,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:03:18,216 INFO L87 Difference]: Start difference. First operand 3102 states and 4401 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 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) [2023-11-29 00:03:18,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:18,401 INFO L93 Difference]: Finished difference Result 6074 states and 8610 transitions. [2023-11-29 00:03:18,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:03:18,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 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 1482 [2023-11-29 00:03:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:18,420 INFO L225 Difference]: With dead ends: 6074 [2023-11-29 00:03:18,420 INFO L226 Difference]: Without dead ends: 3100 [2023-11-29 00:03:18,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1481 GetRequests, 1480 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:03:18,425 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 123 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:18,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 942 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:03:18,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2023-11-29 00:03:18,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 3100. [2023-11-29 00:03:18,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 3027 states have (on average 1.4066732738685166) internal successors, (4258), 3037 states have internal predecessors, (4258), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 61 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-29 00:03:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 4398 transitions. [2023-11-29 00:03:18,560 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 4398 transitions. Word has length 1482 [2023-11-29 00:03:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:18,561 INFO L495 AbstractCegarLoop]: Abstraction has 3100 states and 4398 transitions. [2023-11-29 00:03:18,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 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) [2023-11-29 00:03:18,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 4398 transitions. [2023-11-29 00:03:18,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1496 [2023-11-29 00:03:18,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:18,607 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, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:18,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:03:18,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:03:18,808 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:18,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:18,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1791120637, now seen corresponding path program 1 times [2023-11-29 00:03:18,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:18,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820267333] [2023-11-29 00:03:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:18,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:19,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:19,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061989286] [2023-11-29 00:03:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:19,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:19,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:19,305 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:19,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856b3bbb-d025-483a-a3ee-23d1f2687445/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process