./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test1-1.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_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/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_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/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_65db0699-1e61-4d49-a8c7-3823a4a13741/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 72c3cbe0b435a963730c7c79c0d825f3c978c53ad7cc61822ef9417e2e6ee67f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:39:55,380 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:39:55,447 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:39:55,452 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:39:55,453 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:39:55,477 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:39:55,478 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:39:55,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:39:55,479 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:39:55,480 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:39:55,480 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:39:55,481 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:39:55,481 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:39:55,482 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:39:55,482 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:39:55,483 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:39:55,484 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:39:55,484 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:39:55,484 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:39:55,485 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:39:55,485 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:39:55,489 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:39:55,489 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:39:55,490 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:39:55,490 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:39:55,491 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:39:55,491 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:39:55,491 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:39:55,492 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:39:55,492 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:39:55,493 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:39:55,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:39:55,493 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:39:55,493 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:39:55,494 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:39:55,494 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:39:55,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:39:55,494 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:39:55,494 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:39:55,495 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:39:55,495 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:39:55,495 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:39:55,495 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_65db0699-1e61-4d49-a8c7-3823a4a13741/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72c3cbe0b435a963730c7c79c0d825f3c978c53ad7cc61822ef9417e2e6ee67f [2023-11-29 00:39:55,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:39:55,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:39:55,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:39:55,747 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:39:55,748 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:39:55,749 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test1-1.i [2023-11-29 00:39:58,553 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:39:58,800 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:39:58,800 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test1-1.i [2023-11-29 00:39:58,817 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/data/95c608a2b/513e25f44f234ed8a563f74b1e818808/FLAG8d5f26ba2 [2023-11-29 00:39:58,832 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/data/95c608a2b/513e25f44f234ed8a563f74b1e818808 [2023-11-29 00:39:58,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:39:58,836 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:39:58,837 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:39:58,838 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:39:58,842 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:39:58,843 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:39:58" (1/1) ... [2023-11-29 00:39:58,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c7dc22c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:58, skipping insertion in model container [2023-11-29 00:39:58,844 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:39:58" (1/1) ... [2023-11-29 00:39:58,915 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:39:59,255 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_65db0699-1e61-4d49-a8c7-3823a4a13741/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test1-1.i[33021,33034] [2023-11-29 00:39:59,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:39:59,349 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:39:59,384 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_65db0699-1e61-4d49-a8c7-3823a4a13741/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test1-1.i[33021,33034] [2023-11-29 00:39:59,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:39:59,469 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:39:59,470 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:59 WrapperNode [2023-11-29 00:39:59,470 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:39:59,471 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:39:59,471 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:39:59,471 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:39:59,479 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:59" (1/1) ... [2023-11-29 00:39:59,506 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:59" (1/1) ... [2023-11-29 00:39:59,555 INFO L138 Inliner]: procedures = 177, calls = 186, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 790 [2023-11-29 00:39:59,556 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:39:59,557 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:39:59,557 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:39:59,557 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:39:59,570 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:59" (1/1) ... [2023-11-29 00:39:59,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:59" (1/1) ... [2023-11-29 00:39:59,580 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:59" (1/1) ... [2023-11-29 00:39:59,652 INFO L175 MemorySlicer]: Split 163 memory accesses to 3 slices as follows [2, 5, 156]. 96 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 43 writes are split as follows [0, 1, 42]. [2023-11-29 00:39:59,653 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:59" (1/1) ... [2023-11-29 00:39:59,653 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:59" (1/1) ... [2023-11-29 00:39:59,698 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:59" (1/1) ... [2023-11-29 00:39:59,707 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:59" (1/1) ... [2023-11-29 00:39:59,712 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:59" (1/1) ... [2023-11-29 00:39:59,717 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:59" (1/1) ... [2023-11-29 00:39:59,726 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:39:59,727 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:39:59,727 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:39:59,728 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:39:59,729 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:59" (1/1) ... [2023-11-29 00:39:59,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:39:59,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:39:59,758 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:39:59,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:39:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:39:59,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:39:59,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:39:59,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 00:39:59,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 00:39:59,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:39:59,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:39:59,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:39:59,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-29 00:39:59,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-29 00:39:59,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-29 00:39:59,797 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-29 00:39:59,797 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-29 00:39:59,797 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-29 00:39:59,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:39:59,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:39:59,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:39:59,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 00:39:59,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 00:39:59,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 00:39:59,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 00:39:59,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 00:39:59,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 00:39:59,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:39:59,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:39:59,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:39:59,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:39:59,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:39:59,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:39:59,966 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:39:59,968 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:40:00,805 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:40:00,845 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:40:00,845 INFO L309 CfgBuilder]: Removed 31 assume(true) statements. [2023-11-29 00:40:00,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:40:00 BoogieIcfgContainer [2023-11-29 00:40:00,846 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:40:00,848 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:40:00,848 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:40:00,851 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:40:00,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:39:58" (1/3) ... [2023-11-29 00:40:00,852 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1447f93b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:40:00, skipping insertion in model container [2023-11-29 00:40:00,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:59" (2/3) ... [2023-11-29 00:40:00,853 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1447f93b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:40:00, skipping insertion in model container [2023-11-29 00:40:00,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:40:00" (3/3) ... [2023-11-29 00:40:00,854 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test1-1.i [2023-11-29 00:40:00,872 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:40:00,872 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:40:00,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:40:00,927 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;@1ffeae99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:40:00,927 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:40:00,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 207 states, 190 states have (on average 1.7052631578947368) internal successors, (324), 201 states have internal predecessors, (324), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 00:40:00,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 00:40:00,938 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:00,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:00,939 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:00,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:00,944 INFO L85 PathProgramCache]: Analyzing trace with hash -189480315, now seen corresponding path program 1 times [2023-11-29 00:40:00,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:00,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394049842] [2023-11-29 00:40:00,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:00,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:01,149 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 00:40:01,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:01,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394049842] [2023-11-29 00:40:01,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394049842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:40:01,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:40:01,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:40:01,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287707210] [2023-11-29 00:40:01,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:40:01,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:40:01,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:01,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:40:01,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:40:01,189 INFO L87 Difference]: Start difference. First operand has 207 states, 190 states have (on average 1.7052631578947368) internal successors, (324), 201 states have internal predecessors, (324), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:40:01,289 INFO L93 Difference]: Finished difference Result 585 states and 1003 transitions. [2023-11-29 00:40:01,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:40:01,292 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 00:40:01,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:40:01,307 INFO L225 Difference]: With dead ends: 585 [2023-11-29 00:40:01,307 INFO L226 Difference]: Without dead ends: 377 [2023-11-29 00:40:01,312 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 00:40:01,316 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 252 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:40:01,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 653 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:40:01,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-11-29 00:40:01,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 206. [2023-11-29 00:40:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 190 states have (on average 1.5105263157894737) internal successors, (287), 200 states have internal predecessors, (287), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 00:40:01,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 313 transitions. [2023-11-29 00:40:01,381 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 313 transitions. Word has length 9 [2023-11-29 00:40:01,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:40:01,381 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 313 transitions. [2023-11-29 00:40:01,382 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 00:40:01,382 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 313 transitions. [2023-11-29 00:40:01,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 00:40:01,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:01,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:01,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:40:01,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:01,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:01,389 INFO L85 PathProgramCache]: Analyzing trace with hash -40822134, now seen corresponding path program 1 times [2023-11-29 00:40:01,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:01,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632799193] [2023-11-29 00:40:01,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:01,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:01,459 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:40:01,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806172290] [2023-11-29 00:40:01,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:01,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:01,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:01,461 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:01,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:40:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:01,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:40:01,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:01,790 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 00:40:01,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:40:01,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:01,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632799193] [2023-11-29 00:40:01,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:40:01,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806172290] [2023-11-29 00:40:01,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806172290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:40:01,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:40:01,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:40:01,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329814078] [2023-11-29 00:40:01,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:40:01,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:40:01,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:01,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:40:01,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:40:01,796 INFO L87 Difference]: Start difference. First operand 206 states and 313 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:01,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:40:01,904 INFO L93 Difference]: Finished difference Result 431 states and 655 transitions. [2023-11-29 00:40:01,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:40:01,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-11-29 00:40:01,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:40:01,907 INFO L225 Difference]: With dead ends: 431 [2023-11-29 00:40:01,907 INFO L226 Difference]: Without dead ends: 227 [2023-11-29 00:40:01,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:40:01,910 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 9 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:40:01,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 564 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:40:01,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-29 00:40:01,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2023-11-29 00:40:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 210 states have (on average 1.4619047619047618) internal successors, (307), 220 states have internal predecessors, (307), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 00:40:01,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 333 transitions. [2023-11-29 00:40:01,928 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 333 transitions. Word has length 84 [2023-11-29 00:40:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:40:01,929 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 333 transitions. [2023-11-29 00:40:01,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 333 transitions. [2023-11-29 00:40:01,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 00:40:01,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:01,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:01,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:40:02,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:02,137 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:02,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:02,138 INFO L85 PathProgramCache]: Analyzing trace with hash 451804040, now seen corresponding path program 1 times [2023-11-29 00:40:02,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:02,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929228958] [2023-11-29 00:40:02,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:02,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:02,195 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:40:02,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921434324] [2023-11-29 00:40:02,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:02,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:02,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:02,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:02,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:40:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:02,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:40:02,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:02,532 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 00:40:02,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:40:02,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:02,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929228958] [2023-11-29 00:40:02,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:40:02,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921434324] [2023-11-29 00:40:02,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921434324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:40:02,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:40:02,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:40:02,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335011159] [2023-11-29 00:40:02,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:40:02,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:40:02,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:02,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:40:02,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:40:02,537 INFO L87 Difference]: Start difference. First operand 226 states and 333 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:02,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:40:02,626 INFO L93 Difference]: Finished difference Result 437 states and 651 transitions. [2023-11-29 00:40:02,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:40:02,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-11-29 00:40:02,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:40:02,628 INFO L225 Difference]: With dead ends: 437 [2023-11-29 00:40:02,629 INFO L226 Difference]: Without dead ends: 213 [2023-11-29 00:40:02,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:40:02,631 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 165 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:40:02,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 694 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:40:02,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-29 00:40:02,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2023-11-29 00:40:02,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 196 states have (on average 1.4591836734693877) internal successors, (286), 206 states have internal predecessors, (286), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 00:40:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 312 transitions. [2023-11-29 00:40:02,646 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 312 transitions. Word has length 84 [2023-11-29 00:40:02,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:40:02,647 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 312 transitions. [2023-11-29 00:40:02,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:02,647 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 312 transitions. [2023-11-29 00:40:02,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 00:40:02,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:02,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:02,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:40:02,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 00:40:02,853 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:02,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:02,853 INFO L85 PathProgramCache]: Analyzing trace with hash -209873770, now seen corresponding path program 1 times [2023-11-29 00:40:02,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:02,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860058522] [2023-11-29 00:40:02,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:02,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:02,907 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:40:02,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096863548] [2023-11-29 00:40:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:02,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:02,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:02,910 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:02,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:40:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:03,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:40:03,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:03,309 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 00:40:03,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:40:03,431 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 00:40:03,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:03,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860058522] [2023-11-29 00:40:03,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:40:03,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096863548] [2023-11-29 00:40:03,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096863548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:40:03,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:40:03,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-29 00:40:03,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979388331] [2023-11-29 00:40:03,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:40:03,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:40:03,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:03,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:40:03,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:40:03,434 INFO L87 Difference]: Start difference. First operand 212 states and 312 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:03,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:40:03,557 INFO L93 Difference]: Finished difference Result 775 states and 1137 transitions. [2023-11-29 00:40:03,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:40:03,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-11-29 00:40:03,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:40:03,563 INFO L225 Difference]: With dead ends: 775 [2023-11-29 00:40:03,564 INFO L226 Difference]: Without dead ends: 746 [2023-11-29 00:40:03,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:40:03,566 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 1003 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:40:03,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 1184 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:40:03,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-11-29 00:40:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 746. [2023-11-29 00:40:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 721 states have (on average 1.4452149791955617) internal successors, (1042), 731 states have internal predecessors, (1042), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-29 00:40:03,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1086 transitions. [2023-11-29 00:40:03,598 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1086 transitions. Word has length 84 [2023-11-29 00:40:03,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:40:03,598 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 1086 transitions. [2023-11-29 00:40:03,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:03,599 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1086 transitions. [2023-11-29 00:40:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-29 00:40:03,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:03,607 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:03,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:40:03,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:03,809 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:03,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:03,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1375306053, now seen corresponding path program 2 times [2023-11-29 00:40:03,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:03,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967688293] [2023-11-29 00:40:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:03,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:03,970 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:40:03,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33377636] [2023-11-29 00:40:03,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:40:03,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:03,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:03,977 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:03,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:40:04,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 00:40:04,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:40:04,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:40:04,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-11-29 00:40:05,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:40:05,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:05,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967688293] [2023-11-29 00:40:05,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:40:05,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33377636] [2023-11-29 00:40:05,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33377636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:40:05,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:40:05,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:40:05,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135583726] [2023-11-29 00:40:05,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:40:05,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:40:05,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:05,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:40:05,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:40:05,561 INFO L87 Difference]: Start difference. First operand 746 states and 1086 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:05,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:40:05,765 INFO L93 Difference]: Finished difference Result 1362 states and 1980 transitions. [2023-11-29 00:40:05,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:40:05,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 309 [2023-11-29 00:40:05,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:40:05,771 INFO L225 Difference]: With dead ends: 1362 [2023-11-29 00:40:05,771 INFO L226 Difference]: Without dead ends: 744 [2023-11-29 00:40:05,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:40:05,774 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 123 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:40:05,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 856 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:40:05,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2023-11-29 00:40:05,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2023-11-29 00:40:05,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 719 states have (on average 1.4450625869262865) internal successors, (1039), 729 states have internal predecessors, (1039), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-29 00:40:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1083 transitions. [2023-11-29 00:40:05,803 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1083 transitions. Word has length 309 [2023-11-29 00:40:05,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:40:05,803 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 1083 transitions. [2023-11-29 00:40:05,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1083 transitions. [2023-11-29 00:40:05,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2023-11-29 00:40:05,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:05,810 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:05,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 00:40:06,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:06,013 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:06,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:06,013 INFO L85 PathProgramCache]: Analyzing trace with hash -936173928, now seen corresponding path program 1 times [2023-11-29 00:40:06,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:06,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910153396] [2023-11-29 00:40:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:06,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:06,152 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:40:06,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718121122] [2023-11-29 00:40:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:06,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:06,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:06,157 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:06,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:40:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:06,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 1633 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:40:06,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 448 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:40:07,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:40:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 448 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:40:07,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:07,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910153396] [2023-11-29 00:40:07,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:40:07,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718121122] [2023-11-29 00:40:07,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718121122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:40:07,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:40:07,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 00:40:07,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950160533] [2023-11-29 00:40:07,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:40:07,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:40:07,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:07,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:40:07,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:40:07,527 INFO L87 Difference]: Start difference. First operand 744 states and 1083 transitions. Second operand has 12 states, 12 states have (on average 51.833333333333336) internal successors, (622), 12 states have internal predecessors, (622), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 00:40:07,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:40:07,808 INFO L93 Difference]: Finished difference Result 1841 states and 2685 transitions. [2023-11-29 00:40:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:40:07,809 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 51.833333333333336) internal successors, (622), 12 states have internal predecessors, (622), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 322 [2023-11-29 00:40:07,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:40:07,822 INFO L225 Difference]: With dead ends: 1841 [2023-11-29 00:40:07,822 INFO L226 Difference]: Without dead ends: 1812 [2023-11-29 00:40:07,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 632 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:40:07,824 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 3569 mSDsluCounter, 2389 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3595 SdHoareTripleChecker+Valid, 2808 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:40:07,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3595 Valid, 2808 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:40:07,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2023-11-29 00:40:07,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1812. [2023-11-29 00:40:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1769 states have (on average 1.4420576596947428) internal successors, (2551), 1779 states have internal predecessors, (2551), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:40:07,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2631 transitions. [2023-11-29 00:40:07,888 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2631 transitions. Word has length 322 [2023-11-29 00:40:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:40:07,889 INFO L495 AbstractCegarLoop]: Abstraction has 1812 states and 2631 transitions. [2023-11-29 00:40:07,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 51.833333333333336) internal successors, (622), 12 states have internal predecessors, (622), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 00:40:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2631 transitions. [2023-11-29 00:40:07,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2023-11-29 00:40:07,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:07,917 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:07,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:40:08,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:08,118 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:08,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:08,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1971605512, now seen corresponding path program 2 times [2023-11-29 00:40:08,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:08,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980036021] [2023-11-29 00:40:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:08,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:08,469 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:40:08,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347478543] [2023-11-29 00:40:08,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:40:08,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:08,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:08,473 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:08,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:40:37,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:40:37,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:40:37,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 00:40:37,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:37,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 00:40:37,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:40:37,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 00:40:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3370 backedges. 1347 proven. 137 refuted. 0 times theorem prover too weak. 1886 trivial. 0 not checked. [2023-11-29 00:40:37,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:40:38,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:40:38,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 00:40:48,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:48,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980036021] [2023-11-29 00:40:48,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:40:48,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347478543] [2023-11-29 00:40:48,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347478543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:40:48,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:40:48,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-29 00:40:48,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793942008] [2023-11-29 00:40:48,712 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:40:48,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:40:48,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:48,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:40:48,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:40:48,714 INFO L87 Difference]: Start difference. First operand 1812 states and 2631 transitions. Second operand has 15 states, 15 states have (on average 18.133333333333333) internal successors, (272), 15 states have internal predecessors, (272), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:40:54,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:40:54,743 INFO L93 Difference]: Finished difference Result 3227 states and 4679 transitions. [2023-11-29 00:40:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:40:54,744 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 18.133333333333333) internal successors, (272), 15 states have internal predecessors, (272), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 772 [2023-11-29 00:40:54,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:40:54,756 INFO L225 Difference]: With dead ends: 3227 [2023-11-29 00:40:54,756 INFO L226 Difference]: Without dead ends: 1849 [2023-11-29 00:40:54,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1484 GetRequests, 1452 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 00:40:54,760 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 1066 mSDsluCounter, 4693 mSDsCounter, 0 mSdLazyCounter, 4019 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 5425 SdHoareTripleChecker+Invalid, 4026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 4019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:40:54,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1074 Valid, 5425 Invalid, 4026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 4019 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-11-29 00:40:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2023-11-29 00:40:54,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1844. [2023-11-29 00:40:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1801 states have (on average 1.4369794558578568) internal successors, (2588), 1811 states have internal predecessors, (2588), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:40:54,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2668 transitions. [2023-11-29 00:40:54,824 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2668 transitions. Word has length 772 [2023-11-29 00:40:54,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:40:54,825 INFO L495 AbstractCegarLoop]: Abstraction has 1844 states and 2668 transitions. [2023-11-29 00:40:54,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 18.133333333333333) internal successors, (272), 15 states have internal predecessors, (272), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:40:54,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2668 transitions. [2023-11-29 00:40:54,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2023-11-29 00:40:54,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:54,850 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:54,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 00:40:55,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:55,051 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:55,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:55,052 INFO L85 PathProgramCache]: Analyzing trace with hash 265691702, now seen corresponding path program 1 times [2023-11-29 00:40:55,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:55,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38776033] [2023-11-29 00:40:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:55,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:55,308 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:40:55,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510732973] [2023-11-29 00:40:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:55,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:55,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:55,309 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:55,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:40:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:56,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 3773 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:40:56,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3370 backedges. 1336 proven. 0 refuted. 0 times theorem prover too weak. 2034 trivial. 0 not checked. [2023-11-29 00:40:56,691 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:40:56,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:56,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38776033] [2023-11-29 00:40:56,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:40:56,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510732973] [2023-11-29 00:40:56,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510732973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:40:56,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:40:56,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:40:56,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427397699] [2023-11-29 00:40:56,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:40:56,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:40:56,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:56,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:40:56,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:40:56,695 INFO L87 Difference]: Start difference. First operand 1844 states and 2668 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:40:56,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:40:56,779 INFO L93 Difference]: Finished difference Result 3199 states and 4541 transitions. [2023-11-29 00:40:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:40:56,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 772 [2023-11-29 00:40:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:40:56,788 INFO L225 Difference]: With dead ends: 3199 [2023-11-29 00:40:56,788 INFO L226 Difference]: Without dead ends: 1362 [2023-11-29 00:40:56,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 769 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:40:56,792 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 78 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:40:56,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 562 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:40:56,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2023-11-29 00:40:56,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1362. [2023-11-29 00:40:56,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1319 states have (on average 1.3495072024260804) internal successors, (1780), 1329 states have internal predecessors, (1780), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:40:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1860 transitions. [2023-11-29 00:40:56,842 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1860 transitions. Word has length 772 [2023-11-29 00:40:56,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:40:56,843 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1860 transitions. [2023-11-29 00:40:56,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:40:56,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1860 transitions. [2023-11-29 00:40:56,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2023-11-29 00:40:56,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:56,853 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:56,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:40:57,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:57,054 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:57,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:57,055 INFO L85 PathProgramCache]: Analyzing trace with hash -88405742, now seen corresponding path program 1 times [2023-11-29 00:40:57,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:57,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681553855] [2023-11-29 00:40:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:57,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:57,335 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:40:57,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780344336] [2023-11-29 00:40:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:57,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:57,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:57,336 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:57,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:41:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:14,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 3776 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 00:41:14,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:41:14,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 00:41:15,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:41:15,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 00:41:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3370 backedges. 1661 proven. 317 refuted. 0 times theorem prover too weak. 1392 trivial. 0 not checked. [2023-11-29 00:41:15,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:41:16,116 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:41:16,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 00:41:25,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:25,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681553855] [2023-11-29 00:41:25,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:41:25,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780344336] [2023-11-29 00:41:25,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780344336] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:41:25,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:41:25,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-29 00:41:25,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407304114] [2023-11-29 00:41:25,902 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:41:25,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:41:25,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:25,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:41:25,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2023-11-29 00:41:25,904 INFO L87 Difference]: Start difference. First operand 1362 states and 1860 transitions. Second operand has 16 states, 16 states have (on average 21.75) internal successors, (348), 16 states have internal predecessors, (348), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:41:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:41:32,193 INFO L93 Difference]: Finished difference Result 2292 states and 3143 transitions. [2023-11-29 00:41:32,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 00:41:32,194 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.75) internal successors, (348), 16 states have internal predecessors, (348), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 773 [2023-11-29 00:41:32,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:41:32,202 INFO L225 Difference]: With dead ends: 2292 [2023-11-29 00:41:32,202 INFO L226 Difference]: Without dead ends: 1362 [2023-11-29 00:41:32,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1486 GetRequests, 1452 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 00:41:32,205 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 633 mSDsluCounter, 6532 mSDsCounter, 0 mSdLazyCounter, 3737 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 7263 SdHoareTripleChecker+Invalid, 3742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:41:32,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 7263 Invalid, 3742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 3737 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-11-29 00:41:32,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2023-11-29 00:41:32,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1362. [2023-11-29 00:41:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1319 states have (on average 1.3487490523123578) internal successors, (1779), 1329 states have internal predecessors, (1779), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:41:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1859 transitions. [2023-11-29 00:41:32,256 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1859 transitions. Word has length 773 [2023-11-29 00:41:32,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:41:32,256 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1859 transitions. [2023-11-29 00:41:32,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.75) internal successors, (348), 16 states have internal predecessors, (348), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:41:32,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1859 transitions. [2023-11-29 00:41:32,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2023-11-29 00:41:32,266 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:41:32,267 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:32,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:41:32,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 00:41:32,469 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:41:32,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:32,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1357164358, now seen corresponding path program 2 times [2023-11-29 00:41:32,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:32,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376937046] [2023-11-29 00:41:32,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:32,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:32,737 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:41:32,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534699807] [2023-11-29 00:41:32,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:41:32,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:32,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:41:32,739 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:41:32,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:41:50,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:41:50,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:41:50,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 3777 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 00:41:50,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:41:50,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 00:41:51,236 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:41:51,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 00:41:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 883 proven. 32 refuted. 0 times theorem prover too weak. 2456 trivial. 0 not checked. [2023-11-29 00:41:51,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:41:51,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:41:51,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 00:41:53,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:53,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376937046] [2023-11-29 00:41:53,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:41:53,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534699807] [2023-11-29 00:41:53,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534699807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:41:53,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:41:53,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-29 00:41:53,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927409840] [2023-11-29 00:41:53,617 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:41:53,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:41:53,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:53,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:41:53,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:41:53,619 INFO L87 Difference]: Start difference. First operand 1362 states and 1859 transitions. Second operand has 14 states, 14 states have (on average 14.214285714285714) internal successors, (199), 14 states have internal predecessors, (199), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:41:55,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:41:58,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:41:58,772 INFO L93 Difference]: Finished difference Result 2558 states and 3502 transitions. [2023-11-29 00:41:58,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:41:58,773 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.214285714285714) internal successors, (199), 14 states have internal predecessors, (199), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 774 [2023-11-29 00:41:58,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:41:58,780 INFO L225 Difference]: With dead ends: 2558 [2023-11-29 00:41:58,780 INFO L226 Difference]: Without dead ends: 1362 [2023-11-29 00:41:58,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1488 GetRequests, 1458 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:41:58,783 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 606 mSDsluCounter, 2482 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:41:58,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 2858 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-29 00:41:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2023-11-29 00:41:58,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1362. [2023-11-29 00:41:58,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1319 states have (on average 1.3479909021986354) internal successors, (1778), 1329 states have internal predecessors, (1778), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:41:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1858 transitions. [2023-11-29 00:41:58,821 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1858 transitions. Word has length 774 [2023-11-29 00:41:58,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:41:58,821 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1858 transitions. [2023-11-29 00:41:58,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.214285714285714) internal successors, (199), 14 states have internal predecessors, (199), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:41:58,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1858 transitions. [2023-11-29 00:41:58,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-29 00:41:58,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:41:58,829 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:58,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 00:41:59,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:41:59,030 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:41:59,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:59,030 INFO L85 PathProgramCache]: Analyzing trace with hash -308890218, now seen corresponding path program 3 times [2023-11-29 00:41:59,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:59,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874906242] [2023-11-29 00:41:59,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:59,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:59,269 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:41:59,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681724689] [2023-11-29 00:41:59,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:41:59,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:59,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:41:59,270 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:41:59,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:42:00,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:42:00,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:00,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:42:00,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3373 backedges. 629 proven. 0 refuted. 0 times theorem prover too weak. 2744 trivial. 0 not checked. [2023-11-29 00:42:00,913 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:42:00,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:00,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874906242] [2023-11-29 00:42:00,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:42:00,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681724689] [2023-11-29 00:42:00,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681724689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:42:00,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:42:00,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:42:00,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458441848] [2023-11-29 00:42:00,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:42:00,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:42:00,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:00,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:42:00,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:42:00,916 INFO L87 Difference]: Start difference. First operand 1362 states and 1858 transitions. Second operand has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:42:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:01,089 INFO L93 Difference]: Finished difference Result 2724 states and 3734 transitions. [2023-11-29 00:42:01,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:42:01,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 775 [2023-11-29 00:42:01,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:01,095 INFO L225 Difference]: With dead ends: 2724 [2023-11-29 00:42:01,096 INFO L226 Difference]: Without dead ends: 1397 [2023-11-29 00:42:01,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 770 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:42:01,098 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 8 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:01,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 729 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:42:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2023-11-29 00:42:01,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1390. [2023-11-29 00:42:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1347 states have (on average 1.3385300668151447) internal successors, (1803), 1357 states have internal predecessors, (1803), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:42:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1883 transitions. [2023-11-29 00:42:01,141 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1883 transitions. Word has length 775 [2023-11-29 00:42:01,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:01,141 INFO L495 AbstractCegarLoop]: Abstraction has 1390 states and 1883 transitions. [2023-11-29 00:42:01,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:42:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1883 transitions. [2023-11-29 00:42:01,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2023-11-29 00:42:01,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:01,152 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:01,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 00:42:01,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:42:01,352 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:01,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:01,353 INFO L85 PathProgramCache]: Analyzing trace with hash -543786932, now seen corresponding path program 1 times [2023-11-29 00:42:01,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:01,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620469311] [2023-11-29 00:42:01,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:01,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:01,576 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:42:01,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607020942] [2023-11-29 00:42:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:01,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:01,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:01,578 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:01,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:42:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:14,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 3788 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 00:42:14,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3397 backedges. 331 proven. 0 refuted. 0 times theorem prover too weak. 3066 trivial. 0 not checked. [2023-11-29 00:42:14,625 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:42:14,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:14,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620469311] [2023-11-29 00:42:14,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:42:14,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607020942] [2023-11-29 00:42:14,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607020942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:42:14,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:42:14,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 00:42:14,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056682641] [2023-11-29 00:42:14,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:42:14,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:42:14,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:42:14,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:42:14,627 INFO L87 Difference]: Start difference. First operand 1390 states and 1883 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 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 00:42:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:15,007 INFO L93 Difference]: Finished difference Result 2783 states and 3790 transitions. [2023-11-29 00:42:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:42:15,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 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 785 [2023-11-29 00:42:15,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:15,012 INFO L225 Difference]: With dead ends: 2783 [2023-11-29 00:42:15,013 INFO L226 Difference]: Without dead ends: 1440 [2023-11-29 00:42:15,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 779 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:42:15,015 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 13 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:15,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1000 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:42:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2023-11-29 00:42:15,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1430. [2023-11-29 00:42:15,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1387 states have (on average 1.3359769286229273) internal successors, (1853), 1397 states have internal predecessors, (1853), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:42:15,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 1933 transitions. [2023-11-29 00:42:15,046 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 1933 transitions. Word has length 785 [2023-11-29 00:42:15,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:15,046 INFO L495 AbstractCegarLoop]: Abstraction has 1430 states and 1933 transitions. [2023-11-29 00:42:15,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 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 00:42:15,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 1933 transitions. [2023-11-29 00:42:15,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-29 00:42:15,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:15,054 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:15,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:42:15,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:42:15,255 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:15,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:15,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1915565544, now seen corresponding path program 1 times [2023-11-29 00:42:15,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:15,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952902111] [2023-11-29 00:42:15,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:15,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:15,510 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:42:15,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921557334] [2023-11-29 00:42:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:15,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:15,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:15,512 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:15,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:42:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:30,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 3795 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:42:30,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3418 backedges. 1431 proven. 0 refuted. 0 times theorem prover too weak. 1987 trivial. 0 not checked. [2023-11-29 00:42:30,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:42:30,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:30,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952902111] [2023-11-29 00:42:30,512 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:42:30,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921557334] [2023-11-29 00:42:30,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921557334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:42:30,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:42:30,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:42:30,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748095442] [2023-11-29 00:42:30,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:42:30,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:42:30,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:30,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:42:30,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:42:30,515 INFO L87 Difference]: Start difference. First operand 1430 states and 1933 transitions. Second operand has 6 states, 6 states have (on average 35.5) internal successors, (213), 6 states have internal predecessors, (213), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:42:30,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:30,708 INFO L93 Difference]: Finished difference Result 2873 states and 3902 transitions. [2023-11-29 00:42:30,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:42:30,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 35.5) internal successors, (213), 6 states have internal predecessors, (213), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-29 00:42:30,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:30,713 INFO L225 Difference]: With dead ends: 2873 [2023-11-29 00:42:30,714 INFO L226 Difference]: Without dead ends: 1490 [2023-11-29 00:42:30,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 787 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:42:30,715 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 6 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:30,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 736 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:42:30,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2023-11-29 00:42:30,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1442. [2023-11-29 00:42:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1399 states have (on average 1.335239456754825) internal successors, (1868), 1409 states have internal predecessors, (1868), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:42:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1948 transitions. [2023-11-29 00:42:30,761 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1948 transitions. Word has length 792 [2023-11-29 00:42:30,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:30,761 INFO L495 AbstractCegarLoop]: Abstraction has 1442 states and 1948 transitions. [2023-11-29 00:42:30,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.5) internal successors, (213), 6 states have internal predecessors, (213), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:42:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1948 transitions. [2023-11-29 00:42:30,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-29 00:42:30,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:30,772 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:30,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 00:42:30,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:42:30,972 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:30,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:30,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1176480102, now seen corresponding path program 1 times [2023-11-29 00:42:30,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:30,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184944073] [2023-11-29 00:42:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:30,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:31,261 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:42:31,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88401944] [2023-11-29 00:42:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:31,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:31,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:31,263 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:31,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:42:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:41,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 3789 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:42:41,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3418 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 3063 trivial. 0 not checked. [2023-11-29 00:42:41,325 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:42:41,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:41,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184944073] [2023-11-29 00:42:41,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:42:41,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88401944] [2023-11-29 00:42:41,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88401944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:42:41,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:42:41,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 00:42:41,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719620367] [2023-11-29 00:42:41,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:42:41,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:42:41,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:41,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:42:41,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:42:41,328 INFO L87 Difference]: Start difference. First operand 1442 states and 1948 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 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 00:42:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:41,716 INFO L93 Difference]: Finished difference Result 2886 states and 3915 transitions. [2023-11-29 00:42:41,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:42:41,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 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 792 [2023-11-29 00:42:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:41,722 INFO L225 Difference]: With dead ends: 2886 [2023-11-29 00:42:41,722 INFO L226 Difference]: Without dead ends: 1499 [2023-11-29 00:42:41,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 786 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:42:41,725 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 37 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:41,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1012 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:42:41,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2023-11-29 00:42:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1462. [2023-11-29 00:42:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1419 states have (on average 1.3305144467935166) internal successors, (1888), 1429 states have internal predecessors, (1888), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:42:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1968 transitions. [2023-11-29 00:42:41,786 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1968 transitions. Word has length 792 [2023-11-29 00:42:41,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:41,786 INFO L495 AbstractCegarLoop]: Abstraction has 1462 states and 1968 transitions. [2023-11-29 00:42:41,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 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 00:42:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1968 transitions. [2023-11-29 00:42:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-29 00:42:41,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:41,797 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:41,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:42:41,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:42:41,997 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:41,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:41,998 INFO L85 PathProgramCache]: Analyzing trace with hash -32113718, now seen corresponding path program 1 times [2023-11-29 00:42:41,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:41,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096908814] [2023-11-29 00:42:41,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:41,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:42,260 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:42:42,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606748055] [2023-11-29 00:42:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:42,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:42,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:42,261 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:42,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:42:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:56,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 00:42:56,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:56,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 00:42:57,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:42:57,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 00:42:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3418 backedges. 1837 proven. 578 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2023-11-29 00:42:57,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:58,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:42:58,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 00:43:14,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:14,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096908814] [2023-11-29 00:43:14,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:43:14,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606748055] [2023-11-29 00:43:14,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606748055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:43:14,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:43:14,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-29 00:43:14,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700575317] [2023-11-29 00:43:14,019 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:43:14,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:43:14,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:14,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:43:14,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2023-11-29 00:43:14,021 INFO L87 Difference]: Start difference. First operand 1462 states and 1968 transitions. Second operand has 17 states, 17 states have (on average 25.41176470588235) internal successors, (432), 17 states have internal predecessors, (432), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:43:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:43:22,638 INFO L93 Difference]: Finished difference Result 2315 states and 3130 transitions. [2023-11-29 00:43:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 00:43:22,639 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 25.41176470588235) internal successors, (432), 17 states have internal predecessors, (432), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-29 00:43:22,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:43:22,645 INFO L225 Difference]: With dead ends: 2315 [2023-11-29 00:43:22,645 INFO L226 Difference]: Without dead ends: 1462 [2023-11-29 00:43:22,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1486 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 00:43:22,648 INFO L413 NwaCegarLoop]: 903 mSDtfsCounter, 978 mSDsluCounter, 7631 mSDsCounter, 0 mSdLazyCounter, 4266 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 8534 SdHoareTripleChecker+Invalid, 4275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 4266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:43:22,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 8534 Invalid, 4275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 4266 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-11-29 00:43:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2023-11-29 00:43:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1462. [2023-11-29 00:43:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1419 states have (on average 1.3298097251585623) internal successors, (1887), 1429 states have internal predecessors, (1887), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:43:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1967 transitions. [2023-11-29 00:43:22,681 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1967 transitions. Word has length 792 [2023-11-29 00:43:22,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:43:22,682 INFO L495 AbstractCegarLoop]: Abstraction has 1462 states and 1967 transitions. [2023-11-29 00:43:22,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 25.41176470588235) internal successors, (432), 17 states have internal predecessors, (432), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:43:22,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1967 transitions. [2023-11-29 00:43:22,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-29 00:43:22,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:43:22,698 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:22,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:43:22,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:43:22,899 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:43:22,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:22,899 INFO L85 PathProgramCache]: Analyzing trace with hash 492693674, now seen corresponding path program 2 times [2023-11-29 00:43:22,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:22,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433834422] [2023-11-29 00:43:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:22,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:23,162 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:43:23,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972820784] [2023-11-29 00:43:23,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:43:23,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:43:23,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:43:23,163 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:43:23,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:43:43,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:43:43,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:43:43,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 00:43:43,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:43:44,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 00:43:44,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:43:44,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 00:43:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3412 backedges. 1719 proven. 1321 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2023-11-29 00:43:45,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:43:45,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:43:45,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 00:44:09,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:44:09,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433834422] [2023-11-29 00:44:09,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:44:09,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972820784] [2023-11-29 00:44:09,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972820784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:44:09,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:44:09,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-11-29 00:44:09,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709469812] [2023-11-29 00:44:09,313 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:44:09,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 00:44:09,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:44:09,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 00:44:09,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:44:09,316 INFO L87 Difference]: Start difference. First operand 1462 states and 1967 transitions. Second operand has 20 states, 20 states have (on average 29.3) internal successors, (586), 20 states have internal predecessors, (586), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:44:21,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:44:21,400 INFO L93 Difference]: Finished difference Result 2029 states and 2745 transitions. [2023-11-29 00:44:21,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 00:44:21,401 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 29.3) internal successors, (586), 20 states have internal predecessors, (586), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-29 00:44:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:44:21,408 INFO L225 Difference]: With dead ends: 2029 [2023-11-29 00:44:21,408 INFO L226 Difference]: Without dead ends: 1462 [2023-11-29 00:44:21,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1481 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 00:44:21,410 INFO L413 NwaCegarLoop]: 1187 mSDtfsCounter, 1168 mSDsluCounter, 13106 mSDsCounter, 0 mSdLazyCounter, 6363 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 14293 SdHoareTripleChecker+Invalid, 6372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 6363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:44:21,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1188 Valid, 14293 Invalid, 6372 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 6363 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2023-11-29 00:44:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2023-11-29 00:44:21,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1462. [2023-11-29 00:44:21,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1419 states have (on average 1.3291050035236083) internal successors, (1886), 1429 states have internal predecessors, (1886), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:44:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1966 transitions. [2023-11-29 00:44:21,462 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1966 transitions. Word has length 792 [2023-11-29 00:44:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:44:21,463 INFO L495 AbstractCegarLoop]: Abstraction has 1462 states and 1966 transitions. [2023-11-29 00:44:21,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.3) internal successors, (586), 20 states have internal predecessors, (586), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:44:21,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1966 transitions. [2023-11-29 00:44:21,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-29 00:44:21,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:44:21,471 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:44:21,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 00:44:21,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:44:21,672 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:44:21,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:44:21,672 INFO L85 PathProgramCache]: Analyzing trace with hash -504222326, now seen corresponding path program 3 times [2023-11-29 00:44:21,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:44:21,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254416258] [2023-11-29 00:44:21,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:21,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:44:21,912 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:44:21,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147935832] [2023-11-29 00:44:21,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:44:21,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:21,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:44:21,913 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:44:21,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:44:25,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:44:25,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:44:25,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 00:44:25,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:44:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3410 backedges. 637 proven. 0 refuted. 0 times theorem prover too weak. 2773 trivial. 0 not checked. [2023-11-29 00:44:25,919 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:44:25,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:44:25,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254416258] [2023-11-29 00:44:25,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:44:25,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147935832] [2023-11-29 00:44:25,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147935832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:44:25,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:44:25,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:44:25,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897744163] [2023-11-29 00:44:25,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:44:25,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:44:25,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:44:25,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:44:25,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:44:25,923 INFO L87 Difference]: Start difference. First operand 1462 states and 1966 transitions. Second operand has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:44:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:44:26,705 INFO L93 Difference]: Finished difference Result 2952 states and 3986 transitions. [2023-11-29 00:44:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:44:26,705 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-29 00:44:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:44:26,711 INFO L225 Difference]: With dead ends: 2952 [2023-11-29 00:44:26,712 INFO L226 Difference]: Without dead ends: 1537 [2023-11-29 00:44:26,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 784 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:44:26,714 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 20 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:44:26,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1210 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:44:26,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2023-11-29 00:44:26,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1512. [2023-11-29 00:44:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1469 states have (on average 1.3213070115724983) internal successors, (1941), 1479 states have internal predecessors, (1941), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:44:26,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2021 transitions. [2023-11-29 00:44:26,766 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2021 transitions. Word has length 792 [2023-11-29 00:44:26,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:44:26,767 INFO L495 AbstractCegarLoop]: Abstraction has 1512 states and 2021 transitions. [2023-11-29 00:44:26,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:44:26,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2021 transitions. [2023-11-29 00:44:26,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-29 00:44:26,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:44:26,776 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, 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 00:44:26,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:44:26,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:44:26,977 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:44:26,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:44:26,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2144442646, now seen corresponding path program 1 times [2023-11-29 00:44:26,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:44:26,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653655339] [2023-11-29 00:44:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:26,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:44:27,259 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:44:27,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772146826] [2023-11-29 00:44:27,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:27,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:27,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:44:27,261 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:44:27,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:45:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:45:44,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 00:45:44,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:45:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3460 backedges. 1227 proven. 14 refuted. 0 times theorem prover too weak. 2219 trivial. 0 not checked. [2023-11-29 00:45:44,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:45:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3460 backedges. 1227 proven. 0 refuted. 0 times theorem prover too weak. 2233 trivial. 0 not checked. [2023-11-29 00:45:46,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:45:46,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653655339] [2023-11-29 00:45:46,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:45:46,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772146826] [2023-11-29 00:45:46,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772146826] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:45:46,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:45:46,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-11-29 00:45:46,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178321770] [2023-11-29 00:45:46,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:45:46,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:45:46,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:45:46,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:45:46,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:45:46,760 INFO L87 Difference]: Start difference. First operand 1512 states and 2021 transitions. Second operand has 7 states, 7 states have (on average 29.285714285714285) internal successors, (205), 7 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:45:56,519 WARN L293 SmtUtils]: Spent 9.64s on a formula simplification. DAG size of input: 67 DAG size of output: 59 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:45:58,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:46:03,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:46:04,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:46:09,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:46:10,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:46:12,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:46:16,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:46:18,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:46:22,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:46:26,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:46:31,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:46:35,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:46:36,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:46:38,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:46:42,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:46:46,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:46:51,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:46:54,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:46:58,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:47:03,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:47:06,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:47:09,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:47:09,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:09,809 INFO L93 Difference]: Finished difference Result 3601 states and 4838 transitions. [2023-11-29 00:47:09,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:47:09,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.285714285714285) internal successors, (205), 7 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-29 00:47:09,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:09,820 INFO L225 Difference]: With dead ends: 3601 [2023-11-29 00:47:09,820 INFO L226 Difference]: Without dead ends: 2152 [2023-11-29 00:47:09,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1588 GetRequests, 1573 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:47:09,823 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 126 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 16 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:09,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 1055 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 453 Invalid, 10 Unknown, 0 Unchecked, 73.1s Time] [2023-11-29 00:47:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2023-11-29 00:47:09,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1532. [2023-11-29 00:47:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1489 states have (on average 1.3169912693082606) internal successors, (1961), 1499 states have internal predecessors, (1961), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:47:09,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 2041 transitions. [2023-11-29 00:47:09,894 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 2041 transitions. Word has length 792 [2023-11-29 00:47:09,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:09,895 INFO L495 AbstractCegarLoop]: Abstraction has 1532 states and 2041 transitions. [2023-11-29 00:47:09,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.285714285714285) internal successors, (205), 7 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:47:09,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 2041 transitions. [2023-11-29 00:47:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-29 00:47:09,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:09,905 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:10,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 00:47:10,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:47:10,106 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:47:10,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:10,106 INFO L85 PathProgramCache]: Analyzing trace with hash -29057670, now seen corresponding path program 1 times [2023-11-29 00:47:10,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:10,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439249914] [2023-11-29 00:47:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:10,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:10,375 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:47:10,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035106648] [2023-11-29 00:47:10,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:10,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:10,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:10,377 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:10,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:47:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:26,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 3785 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 00:47:26,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:26,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 00:47:26,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:47:26,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 26 [2023-11-29 00:47:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3500 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 3211 trivial. 0 not checked. [2023-11-29 00:47:26,586 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:47:26,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:26,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439249914] [2023-11-29 00:47:26,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:47:26,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035106648] [2023-11-29 00:47:26,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035106648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:47:26,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:47:26,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 00:47:26,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706956704] [2023-11-29 00:47:26,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:47:26,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:47:26,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:26,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:47:26,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:47:26,590 INFO L87 Difference]: Start difference. First operand 1532 states and 2041 transitions. Second operand has 12 states, 12 states have (on average 11.083333333333334) internal successors, (133), 11 states have internal predecessors, (133), 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 00:47:28,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:28,933 INFO L93 Difference]: Finished difference Result 3003 states and 4012 transitions. [2023-11-29 00:47:28,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:47:28,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 11.083333333333334) internal successors, (133), 11 states have internal predecessors, (133), 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 812 [2023-11-29 00:47:28,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:28,940 INFO L225 Difference]: With dead ends: 3003 [2023-11-29 00:47:28,940 INFO L226 Difference]: Without dead ends: 1522 [2023-11-29 00:47:28,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 801 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:47:28,941 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 431 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:28,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 1596 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 00:47:28,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2023-11-29 00:47:28,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1522. [2023-11-29 00:47:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1479 states have (on average 1.3177822853279242) internal successors, (1949), 1489 states have internal predecessors, (1949), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:47:28,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 2029 transitions. [2023-11-29 00:47:28,981 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 2029 transitions. Word has length 812 [2023-11-29 00:47:28,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:28,981 INFO L495 AbstractCegarLoop]: Abstraction has 1522 states and 2029 transitions. [2023-11-29 00:47:28,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.083333333333334) internal successors, (133), 11 states have internal predecessors, (133), 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 00:47:28,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 2029 transitions. [2023-11-29 00:47:28,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-29 00:47:28,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:28,988 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:29,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:47:29,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:29,189 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:47:29,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:29,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1969946468, now seen corresponding path program 2 times [2023-11-29 00:47:29,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:29,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119530] [2023-11-29 00:47:29,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:29,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:29,472 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:47:29,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080557366] [2023-11-29 00:47:29,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:47:29,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:29,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:29,473 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:29,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:47:57,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:47:57,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:57,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 3787 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 00:47:57,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:58,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 00:47:58,720 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:47:58,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 00:47:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 1465 proven. 1859 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-11-29 00:47:58,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:59,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:47:59,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 00:48:34,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:34,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119530] [2023-11-29 00:48:34,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:34,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080557366] [2023-11-29 00:48:34,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080557366] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:48:34,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:48:34,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-29 00:48:34,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701638914] [2023-11-29 00:48:34,106 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:34,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:48:34,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:34,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:48:34,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:48:34,109 INFO L87 Difference]: Start difference. First operand 1522 states and 2029 transitions. Second operand has 19 states, 19 states have (on average 35.73684210526316) internal successors, (679), 19 states have internal predecessors, (679), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:48:45,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:45,848 INFO L93 Difference]: Finished difference Result 1960 states and 2628 transitions. [2023-11-29 00:48:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 00:48:45,849 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 35.73684210526316) internal successors, (679), 19 states have internal predecessors, (679), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 812 [2023-11-29 00:48:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:45,856 INFO L225 Difference]: With dead ends: 1960 [2023-11-29 00:48:45,856 INFO L226 Difference]: Without dead ends: 1512 [2023-11-29 00:48:45,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1560 GetRequests, 1519 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 00:48:45,858 INFO L413 NwaCegarLoop]: 1418 mSDtfsCounter, 917 mSDsluCounter, 16941 mSDsCounter, 0 mSdLazyCounter, 6666 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 18359 SdHoareTripleChecker+Invalid, 6671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:45,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 18359 Invalid, 6671 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5 Valid, 6666 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2023-11-29 00:48:45,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2023-11-29 00:48:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 1512. [2023-11-29 00:48:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1469 states have (on average 1.3185840707964602) internal successors, (1937), 1479 states have internal predecessors, (1937), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:48:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2017 transitions. [2023-11-29 00:48:45,911 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2017 transitions. Word has length 812 [2023-11-29 00:48:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:45,911 INFO L495 AbstractCegarLoop]: Abstraction has 1512 states and 2017 transitions. [2023-11-29 00:48:45,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 35.73684210526316) internal successors, (679), 19 states have internal predecessors, (679), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:48:45,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2017 transitions. [2023-11-29 00:48:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-29 00:48:45,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:45,918 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:45,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:48:46,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:46,119 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:46,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:46,120 INFO L85 PathProgramCache]: Analyzing trace with hash 392950078, now seen corresponding path program 3 times [2023-11-29 00:48:46,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:46,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60744032] [2023-11-29 00:48:46,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:46,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:46,380 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:46,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694843287] [2023-11-29 00:48:46,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:48:46,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:46,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:46,382 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:46,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:49:28,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:49:28,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:49:28,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 00:49:28,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3508 backedges. 651 proven. 0 refuted. 0 times theorem prover too weak. 2857 trivial. 0 not checked. [2023-11-29 00:49:29,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:49:29,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:29,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60744032] [2023-11-29 00:49:29,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:49:29,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694843287] [2023-11-29 00:49:29,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694843287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:49:29,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:49:29,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 00:49:29,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951273837] [2023-11-29 00:49:29,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:49:29,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:49:29,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:29,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:49:29,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:49:29,129 INFO L87 Difference]: Start difference. First operand 1512 states and 2017 transitions. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:49:29,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:29,494 INFO L93 Difference]: Finished difference Result 2240 states and 3006 transitions. [2023-11-29 00:49:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:49:29,495 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 812 [2023-11-29 00:49:29,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:29,499 INFO L225 Difference]: With dead ends: 2240 [2023-11-29 00:49:29,499 INFO L226 Difference]: Without dead ends: 1512 [2023-11-29 00:49:29,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 805 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:49:29,500 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 9 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:29,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1045 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:49:29,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2023-11-29 00:49:29,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 1494. [2023-11-29 00:49:29,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1451 states have (on average 1.3204686423156444) internal successors, (1916), 1461 states have internal predecessors, (1916), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:49:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1996 transitions. [2023-11-29 00:49:29,549 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1996 transitions. Word has length 812 [2023-11-29 00:49:29,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:29,550 INFO L495 AbstractCegarLoop]: Abstraction has 1494 states and 1996 transitions. [2023-11-29 00:49:29,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:49:29,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1996 transitions. [2023-11-29 00:49:29,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-29 00:49:29,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:29,557 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:29,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:49:29,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:29,757 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:49:29,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:29,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1374696966, now seen corresponding path program 1 times [2023-11-29 00:49:29,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:29,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106012923] [2023-11-29 00:49:29,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:29,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:30,018 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:49:30,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040415303] [2023-11-29 00:49:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:30,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:30,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:30,019 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:30,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:49:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:42,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 3795 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 00:49:42,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:43,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 00:49:43,805 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:49:43,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 00:49:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3508 backedges. 1017 proven. 2440 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-29 00:49:43,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:49:44,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:49:44,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 00:50:18,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:50:18,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106012923] [2023-11-29 00:50:18,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:50:18,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040415303] [2023-11-29 00:50:18,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040415303] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:50:18,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:50:18,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-29 00:50:18,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456510636] [2023-11-29 00:50:18,236 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:50:18,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 00:50:18,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:50:18,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 00:50:18,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 00:50:18,239 INFO L87 Difference]: Start difference. First operand 1494 states and 1996 transitions. Second operand has 22 states, 22 states have (on average 34.45454545454545) internal successors, (758), 22 states have internal predecessors, (758), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:50:30,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:50:34,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:50:34,455 INFO L93 Difference]: Finished difference Result 1773 states and 2384 transitions. [2023-11-29 00:50:34,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:50:34,456 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 34.45454545454545) internal successors, (758), 22 states have internal predecessors, (758), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 812 [2023-11-29 00:50:34,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:50:34,460 INFO L225 Difference]: With dead ends: 1773 [2023-11-29 00:50:34,460 INFO L226 Difference]: Without dead ends: 1490 [2023-11-29 00:50:34,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1560 GetRequests, 1515 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 00:50:34,462 INFO L413 NwaCegarLoop]: 1538 mSDtfsCounter, 1512 mSDsluCounter, 18743 mSDsCounter, 0 mSdLazyCounter, 7928 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1538 SdHoareTripleChecker+Valid, 20281 SdHoareTripleChecker+Invalid, 7940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 7928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:50:34,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1538 Valid, 20281 Invalid, 7940 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [12 Valid, 7928 Invalid, 0 Unknown, 0 Unchecked, 15.7s Time] [2023-11-29 00:50:34,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2023-11-29 00:50:34,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1490. [2023-11-29 00:50:34,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1447 states have (on average 1.3206634416033172) internal successors, (1911), 1457 states have internal predecessors, (1911), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:50:34,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 1991 transitions. [2023-11-29 00:50:34,530 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 1991 transitions. Word has length 812 [2023-11-29 00:50:34,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:50:34,530 INFO L495 AbstractCegarLoop]: Abstraction has 1490 states and 1991 transitions. [2023-11-29 00:50:34,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 34.45454545454545) internal successors, (758), 22 states have internal predecessors, (758), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:50:34,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 1991 transitions. [2023-11-29 00:50:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-29 00:50:34,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:50:34,540 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:34,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 00:50:34,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:34,740 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:50:34,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:34,741 INFO L85 PathProgramCache]: Analyzing trace with hash -526036140, now seen corresponding path program 2 times [2023-11-29 00:50:34,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:50:34,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482307484] [2023-11-29 00:50:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:34,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:50:35,009 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:50:35,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448303807] [2023-11-29 00:50:35,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:50:35,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:35,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:50:35,010 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:50:35,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 00:51:31,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:51:31,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:51:31,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 3795 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:51:31,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 531 proven. 0 refuted. 0 times theorem prover too weak. 2987 trivial. 0 not checked. [2023-11-29 00:51:31,137 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:51:31,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:31,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482307484] [2023-11-29 00:51:31,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:51:31,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448303807] [2023-11-29 00:51:31,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448303807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:31,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:31,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:51:31,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750815692] [2023-11-29 00:51:31,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:31,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:51:31,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:31,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:51:31,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:51:31,140 INFO L87 Difference]: Start difference. First operand 1490 states and 1991 transitions. Second operand has 4 states, 3 states have (on average 54.0) internal successors, (162), 4 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 00:51:31,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:31,206 INFO L93 Difference]: Finished difference Result 2893 states and 3897 transitions. [2023-11-29 00:51:31,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:51:31,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 54.0) internal successors, (162), 4 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 812 [2023-11-29 00:51:31,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:31,212 INFO L225 Difference]: With dead ends: 2893 [2023-11-29 00:51:31,212 INFO L226 Difference]: Without dead ends: 1492 [2023-11-29 00:51:31,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 809 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:51:31,215 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 1 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:31,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 680 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:51:31,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2023-11-29 00:51:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1492. [2023-11-29 00:51:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1448 states have (on average 1.3211325966850829) internal successors, (1913), 1459 states have internal predecessors, (1913), 40 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (50), 31 states have call predecessors, (50), 40 states have call successors, (50) [2023-11-29 00:51:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 2003 transitions. [2023-11-29 00:51:31,278 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 2003 transitions. Word has length 812 [2023-11-29 00:51:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:31,278 INFO L495 AbstractCegarLoop]: Abstraction has 1492 states and 2003 transitions. [2023-11-29 00:51:31,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 54.0) internal successors, (162), 4 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 00:51:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 2003 transitions. [2023-11-29 00:51:31,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2023-11-29 00:51:31,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:31,285 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:31,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 00:51:31,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:31,486 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:51:31,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:31,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1337844306, now seen corresponding path program 1 times [2023-11-29 00:51:31,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:31,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632040472] [2023-11-29 00:51:31,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:31,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:31,780 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:51:31,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308329200] [2023-11-29 00:51:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:31,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:31,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:31,781 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:31,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 00:51:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:56,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 3825 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 00:51:56,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:56,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 00:51:57,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:51:57,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 00:51:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3523 backedges. 1919 proven. 942 refuted. 0 times theorem prover too weak. 662 trivial. 0 not checked. [2023-11-29 00:51:57,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:57,892 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:51:57,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 00:52:19,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:19,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632040472] [2023-11-29 00:52:19,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:52:19,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308329200] [2023-11-29 00:52:19,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308329200] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:52:19,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:52:19,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-29 00:52:19,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326345949] [2023-11-29 00:52:19,092 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:52:19,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:52:19,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:19,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:52:19,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:52:19,094 INFO L87 Difference]: Start difference. First operand 1492 states and 2003 transitions. Second operand has 18 states, 18 states have (on average 29.27777777777778) internal successors, (527), 18 states have internal predecessors, (527), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:52:21,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:52:30,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:52:31,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:52:31,902 INFO L93 Difference]: Finished difference Result 2208 states and 2977 transitions. [2023-11-29 00:52:31,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 00:52:31,903 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 29.27777777777778) internal successors, (527), 18 states have internal predecessors, (527), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 814 [2023-11-29 00:52:31,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:52:31,905 INFO L225 Difference]: With dead ends: 2208 [2023-11-29 00:52:31,906 INFO L226 Difference]: Without dead ends: 1488 [2023-11-29 00:52:31,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1562 GetRequests, 1524 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 00:52:31,908 INFO L413 NwaCegarLoop]: 1079 mSDtfsCounter, 892 mSDsluCounter, 10914 mSDsCounter, 0 mSdLazyCounter, 5291 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 11993 SdHoareTripleChecker+Invalid, 5297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:52:31,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 11993 Invalid, 5297 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 5291 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2023-11-29 00:52:31,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2023-11-29 00:52:31,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1488. [2023-11-29 00:52:31,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1444 states have (on average 1.3213296398891967) internal successors, (1908), 1455 states have internal predecessors, (1908), 40 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (50), 31 states have call predecessors, (50), 40 states have call successors, (50) [2023-11-29 00:52:31,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 1998 transitions. [2023-11-29 00:52:31,965 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 1998 transitions. Word has length 814 [2023-11-29 00:52:31,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:52:31,966 INFO L495 AbstractCegarLoop]: Abstraction has 1488 states and 1998 transitions. [2023-11-29 00:52:31,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.27777777777778) internal successors, (527), 18 states have internal predecessors, (527), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:52:31,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 1998 transitions. [2023-11-29 00:52:31,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2023-11-29 00:52:31,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:52:31,973 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:32,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 00:52:32,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:32,174 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:52:32,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:32,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1068249912, now seen corresponding path program 2 times [2023-11-29 00:52:32,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:32,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161709829] [2023-11-29 00:52:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:32,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:32,500 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:52:32,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911454531] [2023-11-29 00:52:32,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:52:32,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:32,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:32,501 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:32,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 00:53:12,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:53:12,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:53:12,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 3825 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 00:53:12,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:53:13,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 00:53:14,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:53:14,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-29 00:53:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3537 backedges. 413 proven. 3116 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 00:53:14,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:53:14,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:53:14,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 00:53:55,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:53:55,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161709829] [2023-11-29 00:53:55,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:53:55,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911454531] [2023-11-29 00:53:55,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911454531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:53:55,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:53:55,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-11-29 00:53:55,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327207712] [2023-11-29 00:53:55,624 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:53:55,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 00:53:55,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:53:55,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 00:53:55,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 00:53:55,627 INFO L87 Difference]: Start difference. First operand 1488 states and 1998 transitions. Second operand has 23 states, 23 states have (on average 35.04347826086956) internal successors, (806), 23 states have internal predecessors, (806), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:54:12,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:54:15,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:54:16,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:54:16,040 INFO L93 Difference]: Finished difference Result 1815 states and 2445 transitions. [2023-11-29 00:54:16,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 00:54:16,041 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 35.04347826086956) internal successors, (806), 23 states have internal predecessors, (806), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 814 [2023-11-29 00:54:16,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:54:16,045 INFO L225 Difference]: With dead ends: 1815 [2023-11-29 00:54:16,045 INFO L226 Difference]: Without dead ends: 1632 [2023-11-29 00:54:16,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1562 GetRequests, 1515 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=419, Invalid=1933, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 00:54:16,048 INFO L413 NwaCegarLoop]: 1714 mSDtfsCounter, 1519 mSDsluCounter, 23881 mSDsCounter, 0 mSdLazyCounter, 9169 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 25595 SdHoareTripleChecker+Invalid, 9180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 9169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:54:16,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 25595 Invalid, 9180 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 9169 Invalid, 0 Unknown, 0 Unchecked, 19.8s Time] [2023-11-29 00:54:16,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2023-11-29 00:54:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1519. [2023-11-29 00:54:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1475 states have (on average 1.3145762711864406) internal successors, (1939), 1486 states have internal predecessors, (1939), 40 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (50), 31 states have call predecessors, (50), 40 states have call successors, (50) [2023-11-29 00:54:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 2029 transitions. [2023-11-29 00:54:16,120 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 2029 transitions. Word has length 814 [2023-11-29 00:54:16,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:54:16,121 INFO L495 AbstractCegarLoop]: Abstraction has 1519 states and 2029 transitions. [2023-11-29 00:54:16,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 35.04347826086956) internal successors, (806), 23 states have internal predecessors, (806), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:54:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 2029 transitions. [2023-11-29 00:54:16,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2023-11-29 00:54:16,130 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:54:16,131 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:54:16,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-29 00:54:16,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:54:16,331 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:54:16,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:54:16,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1652986142, now seen corresponding path program 1 times [2023-11-29 00:54:16,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:54:16,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486795086] [2023-11-29 00:54:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:54:16,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:54:16,642 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:54:16,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080642327] [2023-11-29 00:54:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:54:16,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:54:16,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:54:16,643 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:54:16,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65db0699-1e61-4d49-a8c7-3823a4a13741/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process