./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.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_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/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_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/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_95acedf2-9729-4554-b09c-7509a4288cff/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 9885703216edf9cfe4bfb438db591a48e102e73a3e0423f90ce871c05fdf2b57 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:18:59,495 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:18:59,557 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:18:59,562 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:18:59,563 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:18:59,587 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:18:59,587 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:18:59,588 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:18:59,588 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:18:59,589 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:18:59,589 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:18:59,590 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:18:59,591 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:18:59,591 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:18:59,592 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:18:59,592 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:18:59,593 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:18:59,593 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:18:59,594 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:18:59,594 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:18:59,595 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:18:59,597 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:18:59,598 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:18:59,598 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:18:59,599 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:18:59,599 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:18:59,600 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:18:59,600 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:18:59,601 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:18:59,601 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:18:59,602 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:18:59,602 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:18:59,602 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:18:59,603 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:18:59,603 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:18:59,603 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:18:59,603 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:18:59,604 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:18:59,604 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:18:59,604 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:18:59,604 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:18:59,605 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:18:59,605 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_95acedf2-9729-4554-b09c-7509a4288cff/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9885703216edf9cfe4bfb438db591a48e102e73a3e0423f90ce871c05fdf2b57 [2023-11-29 01:18:59,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:18:59,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:18:59,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:18:59,849 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:18:59,850 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:18:59,851 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i [2023-11-29 01:19:02,644 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:19:02,939 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:19:02,940 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i [2023-11-29 01:19:02,958 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/data/24115f9eb/dae47d93350e4302a1aaea7c2d11165c/FLAG829d966a5 [2023-11-29 01:19:02,973 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/data/24115f9eb/dae47d93350e4302a1aaea7c2d11165c [2023-11-29 01:19:02,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:19:02,977 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:19:02,978 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:19:02,978 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:19:02,984 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:19:02,984 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:19:02" (1/1) ... [2023-11-29 01:19:02,985 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6abb551d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:19:02, skipping insertion in model container [2023-11-29 01:19:02,986 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:19:02" (1/1) ... [2023-11-29 01:19:03,041 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:19:03,457 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_95acedf2-9729-4554-b09c-7509a4288cff/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i[33022,33035] [2023-11-29 01:19:03,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:19:03,658 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:19:03,691 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_95acedf2-9729-4554-b09c-7509a4288cff/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i[33022,33035] [2023-11-29 01:19:03,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:19:03,840 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:19:03,850 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:19:03,850 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:19:03 WrapperNode [2023-11-29 01:19:03,850 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:19:03,851 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:19:03,851 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:19:03,851 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:19:03,857 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:19:03" (1/1) ... [2023-11-29 01:19:03,931 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:19:03" (1/1) ... [2023-11-29 01:19:04,049 INFO L138 Inliner]: procedures = 177, calls = 524, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3130 [2023-11-29 01:19:04,049 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:19:04,050 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:19:04,050 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:19:04,050 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:19:04,062 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:19:03" (1/1) ... [2023-11-29 01:19:04,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:19:03" (1/1) ... [2023-11-29 01:19:04,081 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:19:03" (1/1) ... [2023-11-29 01:19:04,236 INFO L175 MemorySlicer]: Split 490 memory accesses to 5 slices as follows [2, 372, 106, 5, 5]. 76 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 88 writes are split as follows [0, 82, 4, 1, 1]. [2023-11-29 01:19:04,236 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:19:03" (1/1) ... [2023-11-29 01:19:04,236 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:19:03" (1/1) ... [2023-11-29 01:19:04,299 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:19:03" (1/1) ... [2023-11-29 01:19:04,327 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:19:03" (1/1) ... [2023-11-29 01:19:04,334 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:19:03" (1/1) ... [2023-11-29 01:19:04,344 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:19:03" (1/1) ... [2023-11-29 01:19:04,362 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:19:04,363 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:19:04,363 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:19:04,363 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:19:04,364 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:19:03" (1/1) ... [2023-11-29 01:19:04,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:19:04,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:04,396 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:19:04,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:19:04,431 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2023-11-29 01:19:04,431 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2023-11-29 01:19:04,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:19:04,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:19:04,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:19:04,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 01:19:04,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 01:19:04,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 01:19:04,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 01:19:04,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:19:04,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:19:04,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:19:04,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 01:19:04,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 01:19:04,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-29 01:19:04,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-29 01:19:04,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-29 01:19:04,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-29 01:19:04,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#4 [2023-11-29 01:19:04,433 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-29 01:19:04,434 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-29 01:19:04,434 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-29 01:19:04,434 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-29 01:19:04,434 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#4 [2023-11-29 01:19:04,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 01:19:04,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:19:04,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 01:19:04,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 01:19:04,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 01:19:04,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-29 01:19:04,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-29 01:19:04,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:19:04,435 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-29 01:19:04,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 01:19:04,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 01:19:04,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 01:19:04,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-29 01:19:04,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-29 01:19:04,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:19:04,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:19:04,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:19:04,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:19:04,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 01:19:04,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 01:19:04,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:19:04,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:19:04,689 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:19:04,692 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:19:07,101 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:19:07,157 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:19:07,157 INFO L309 CfgBuilder]: Removed 151 assume(true) statements. [2023-11-29 01:19:07,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:19:07 BoogieIcfgContainer [2023-11-29 01:19:07,158 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:19:07,161 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:19:07,161 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:19:07,163 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:19:07,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:19:02" (1/3) ... [2023-11-29 01:19:07,164 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535f2f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:19:07, skipping insertion in model container [2023-11-29 01:19:07,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:19:03" (2/3) ... [2023-11-29 01:19:07,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535f2f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:19:07, skipping insertion in model container [2023-11-29 01:19:07,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:19:07" (3/3) ... [2023-11-29 01:19:07,166 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_test10-1.i [2023-11-29 01:19:07,180 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:19:07,180 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:19:07,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:19:07,246 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;@21d3364d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:19:07,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:19:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 905 states, 886 states have (on average 1.716704288939052) internal successors, (1521), 891 states have internal predecessors, (1521), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-29 01:19:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 01:19:07,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:07,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:07,262 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:07,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:07,267 INFO L85 PathProgramCache]: Analyzing trace with hash 706441512, now seen corresponding path program 1 times [2023-11-29 01:19:07,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:07,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350731187] [2023-11-29 01:19:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:07,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:19:07,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:07,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350731187] [2023-11-29 01:19:07,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350731187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:19:07,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:19:07,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:19:07,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445495022] [2023-11-29 01:19:07,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:19:07,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 01:19:07,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:07,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 01:19:07,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:19:07,479 INFO L87 Difference]: Start difference. First operand has 905 states, 886 states have (on average 1.716704288939052) internal successors, (1521), 891 states have internal predecessors, (1521), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:07,598 INFO L93 Difference]: Finished difference Result 1809 states and 3105 transitions. [2023-11-29 01:19:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 01:19:07,601 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-29 01:19:07,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:07,620 INFO L225 Difference]: With dead ends: 1809 [2023-11-29 01:19:07,620 INFO L226 Difference]: Without dead ends: 903 [2023-11-29 01:19:07,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:19:07,632 INFO L413 NwaCegarLoop]: 1386 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:07,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1386 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:19:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2023-11-29 01:19:07,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 903. [2023-11-29 01:19:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 885 states have (on average 1.5378531073446329) internal successors, (1361), 890 states have internal predecessors, (1361), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 01:19:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1388 transitions. [2023-11-29 01:19:07,727 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1388 transitions. Word has length 12 [2023-11-29 01:19:07,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:07,728 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1388 transitions. [2023-11-29 01:19:07,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:07,728 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1388 transitions. [2023-11-29 01:19:07,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-29 01:19:07,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:07,735 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] [2023-11-29 01:19:07,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:19:07,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:07,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:07,736 INFO L85 PathProgramCache]: Analyzing trace with hash 49589444, now seen corresponding path program 1 times [2023-11-29 01:19:07,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:07,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485409900] [2023-11-29 01:19:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:07,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:19:08,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:08,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485409900] [2023-11-29 01:19:08,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485409900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:19:08,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:19:08,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:19:08,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50740142] [2023-11-29 01:19:08,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:19:08,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:19:08,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:08,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:19:08,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:19:08,122 INFO L87 Difference]: Start difference. First operand 903 states and 1388 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:08,337 INFO L93 Difference]: Finished difference Result 1802 states and 2772 transitions. [2023-11-29 01:19:08,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:19:08,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-29 01:19:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:08,345 INFO L225 Difference]: With dead ends: 1802 [2023-11-29 01:19:08,345 INFO L226 Difference]: Without dead ends: 1245 [2023-11-29 01:19:08,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:19:08,348 INFO L413 NwaCegarLoop]: 1461 mSDtfsCounter, 504 mSDsluCounter, 2778 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 4239 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:08,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 4239 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:19:08,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2023-11-29 01:19:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 905. [2023-11-29 01:19:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 887 states have (on average 1.536640360766629) internal successors, (1363), 892 states have internal predecessors, (1363), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 01:19:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1390 transitions. [2023-11-29 01:19:08,381 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1390 transitions. Word has length 67 [2023-11-29 01:19:08,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:08,381 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1390 transitions. [2023-11-29 01:19:08,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1390 transitions. [2023-11-29 01:19:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-29 01:19:08,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:08,387 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:08,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:19:08,388 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:08,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:08,389 INFO L85 PathProgramCache]: Analyzing trace with hash -917758722, now seen corresponding path program 1 times [2023-11-29 01:19:08,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:08,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347044343] [2023-11-29 01:19:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:08,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:08,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:08,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951419362] [2023-11-29 01:19:08,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:08,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:08,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:08,454 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:08,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:19:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:08,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:19:08,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:19:08,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:19:08,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:08,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347044343] [2023-11-29 01:19:08,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:19:08,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951419362] [2023-11-29 01:19:08,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951419362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:19:08,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:19:08,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:19:08,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723475385] [2023-11-29 01:19:08,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:19:08,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:19:08,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:08,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:19:08,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:19:08,951 INFO L87 Difference]: Start difference. First operand 905 states and 1390 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:09,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:09,070 INFO L93 Difference]: Finished difference Result 1828 states and 2808 transitions. [2023-11-29 01:19:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:19:09,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-11-29 01:19:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:09,077 INFO L225 Difference]: With dead ends: 1828 [2023-11-29 01:19:09,077 INFO L226 Difference]: Without dead ends: 926 [2023-11-29 01:19:09,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:19:09,080 INFO L413 NwaCegarLoop]: 1365 mSDtfsCounter, 9 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2716 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:09,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2716 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:19:09,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2023-11-29 01:19:09,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 925. [2023-11-29 01:19:09,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 907 states have (on average 1.5248070562293274) internal successors, (1383), 912 states have internal predecessors, (1383), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 01:19:09,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1410 transitions. [2023-11-29 01:19:09,114 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1410 transitions. Word has length 144 [2023-11-29 01:19:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:09,114 INFO L495 AbstractCegarLoop]: Abstraction has 925 states and 1410 transitions. [2023-11-29 01:19:09,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1410 transitions. [2023-11-29 01:19:09,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-29 01:19:09,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:09,118 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:09,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:19:09,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:09,323 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:09,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:09,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2084569210, now seen corresponding path program 1 times [2023-11-29 01:19:09,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:09,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309650058] [2023-11-29 01:19:09,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:09,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:09,376 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:09,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576053663] [2023-11-29 01:19:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:09,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:09,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:09,378 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:09,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:19:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:09,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:19:09,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:19:09,823 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:19:09,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:09,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309650058] [2023-11-29 01:19:09,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:19:09,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576053663] [2023-11-29 01:19:09,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576053663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:19:09,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:19:09,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:19:09,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972497012] [2023-11-29 01:19:09,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:19:09,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:19:09,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:09,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:19:09,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:19:09,827 INFO L87 Difference]: Start difference. First operand 925 states and 1410 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:09,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:09,937 INFO L93 Difference]: Finished difference Result 1455 states and 2229 transitions. [2023-11-29 01:19:09,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:19:09,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-11-29 01:19:09,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:09,945 INFO L225 Difference]: With dead ends: 1455 [2023-11-29 01:19:09,945 INFO L226 Difference]: Without dead ends: 946 [2023-11-29 01:19:09,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:19:09,947 INFO L413 NwaCegarLoop]: 1365 mSDtfsCounter, 9 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2716 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:09,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2716 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:19:09,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2023-11-29 01:19:09,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 945. [2023-11-29 01:19:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 927 states have (on average 1.5134843581445523) internal successors, (1403), 932 states have internal predecessors, (1403), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 01:19:09,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1430 transitions. [2023-11-29 01:19:09,978 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1430 transitions. Word has length 144 [2023-11-29 01:19:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:09,979 INFO L495 AbstractCegarLoop]: Abstraction has 945 states and 1430 transitions. [2023-11-29 01:19:09,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:09,980 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1430 transitions. [2023-11-29 01:19:09,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-29 01:19:09,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:09,982 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:09,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:19:10,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:10,183 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:10,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:10,184 INFO L85 PathProgramCache]: Analyzing trace with hash 145407164, now seen corresponding path program 1 times [2023-11-29 01:19:10,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:10,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526749057] [2023-11-29 01:19:10,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:10,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:10,229 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:10,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549581995] [2023-11-29 01:19:10,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:10,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:10,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:10,231 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:10,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:19:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:10,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:19:10,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:19:10,672 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:19:10,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:10,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526749057] [2023-11-29 01:19:10,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:19:10,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549581995] [2023-11-29 01:19:10,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549581995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:19:10,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:19:10,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:19:10,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159685470] [2023-11-29 01:19:10,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:19:10,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:19:10,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:10,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:19:10,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:19:10,676 INFO L87 Difference]: Start difference. First operand 945 states and 1430 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:10,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:10,781 INFO L93 Difference]: Finished difference Result 1874 states and 2844 transitions. [2023-11-29 01:19:10,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:19:10,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-11-29 01:19:10,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:10,786 INFO L225 Difference]: With dead ends: 1874 [2023-11-29 01:19:10,786 INFO L226 Difference]: Without dead ends: 932 [2023-11-29 01:19:10,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:19:10,789 INFO L413 NwaCegarLoop]: 1358 mSDtfsCounter, 165 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3922 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:10,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 3922 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:19:10,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2023-11-29 01:19:10,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 931. [2023-11-29 01:19:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 913 states have (on average 1.5136911281489596) internal successors, (1382), 918 states have internal predecessors, (1382), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 01:19:10,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1409 transitions. [2023-11-29 01:19:10,811 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1409 transitions. Word has length 144 [2023-11-29 01:19:10,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:10,811 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1409 transitions. [2023-11-29 01:19:10,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:10,811 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1409 transitions. [2023-11-29 01:19:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-29 01:19:10,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:10,814 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:10,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 01:19:11,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:11,015 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:11,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:11,015 INFO L85 PathProgramCache]: Analyzing trace with hash -775272374, now seen corresponding path program 1 times [2023-11-29 01:19:11,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:11,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892528620] [2023-11-29 01:19:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:11,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:11,060 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:11,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305383060] [2023-11-29 01:19:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:11,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:11,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:11,062 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:11,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:19:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:11,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:19:11,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:19:11,529 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:19:11,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:11,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892528620] [2023-11-29 01:19:11,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:19:11,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305383060] [2023-11-29 01:19:11,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305383060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:19:11,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:19:11,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:19:11,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050745988] [2023-11-29 01:19:11,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:19:11,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:19:11,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:11,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:19:11,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:19:11,532 INFO L87 Difference]: Start difference. First operand 931 states and 1409 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:11,629 INFO L93 Difference]: Finished difference Result 1429 states and 2177 transitions. [2023-11-29 01:19:11,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:19:11,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-11-29 01:19:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:11,635 INFO L225 Difference]: With dead ends: 1429 [2023-11-29 01:19:11,635 INFO L226 Difference]: Without dead ends: 918 [2023-11-29 01:19:11,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:19:11,637 INFO L413 NwaCegarLoop]: 1351 mSDtfsCounter, 165 mSDsluCounter, 2550 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3901 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:11,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 3901 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:19:11,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2023-11-29 01:19:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 917. [2023-11-29 01:19:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 899 states have (on average 1.513904338153504) internal successors, (1361), 904 states have internal predecessors, (1361), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 01:19:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1388 transitions. [2023-11-29 01:19:11,661 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1388 transitions. Word has length 144 [2023-11-29 01:19:11,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:11,661 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1388 transitions. [2023-11-29 01:19:11,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:11,662 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1388 transitions. [2023-11-29 01:19:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-29 01:19:11,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:11,664 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:11,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:19:11,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 01:19:11,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:11,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:11,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1204877692, now seen corresponding path program 1 times [2023-11-29 01:19:11,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:11,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896457409] [2023-11-29 01:19:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:11,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:11,918 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:11,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632715822] [2023-11-29 01:19:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:11,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:11,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:11,920 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:11,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:19:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:12,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:19:12,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:19:12,562 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:19:12,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:12,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896457409] [2023-11-29 01:19:12,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:19:12,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632715822] [2023-11-29 01:19:12,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632715822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:19:12,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:19:12,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:19:12,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813012851] [2023-11-29 01:19:12,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:19:12,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:19:12,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:12,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:19:12,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:19:12,565 INFO L87 Difference]: Start difference. First operand 917 states and 1388 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:12,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:12,705 INFO L93 Difference]: Finished difference Result 2372 states and 3606 transitions. [2023-11-29 01:19:12,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:19:12,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-11-29 01:19:12,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:12,714 INFO L225 Difference]: With dead ends: 2372 [2023-11-29 01:19:12,714 INFO L226 Difference]: Without dead ends: 1458 [2023-11-29 01:19:12,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:19:12,716 INFO L413 NwaCegarLoop]: 1757 mSDtfsCounter, 765 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 3102 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:12,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 3102 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:19:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2023-11-29 01:19:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1453. [2023-11-29 01:19:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1430 states have (on average 1.5223776223776224) internal successors, (2177), 1435 states have internal predecessors, (2177), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-29 01:19:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 2214 transitions. [2023-11-29 01:19:12,765 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 2214 transitions. Word has length 144 [2023-11-29 01:19:12,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:12,765 INFO L495 AbstractCegarLoop]: Abstraction has 1453 states and 2214 transitions. [2023-11-29 01:19:12,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 2214 transitions. [2023-11-29 01:19:12,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-29 01:19:12,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:12,769 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:12,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:19:12,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:12,970 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:12,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:12,970 INFO L85 PathProgramCache]: Analyzing trace with hash 273048964, now seen corresponding path program 1 times [2023-11-29 01:19:12,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:12,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663817710] [2023-11-29 01:19:12,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:12,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:13,042 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:13,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824376730] [2023-11-29 01:19:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:13,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:13,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:13,044 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:13,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:19:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:13,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:19:13,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:13,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:19:13,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 01:19:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:19:13,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:19:13,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:13,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663817710] [2023-11-29 01:19:13,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:19:13,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824376730] [2023-11-29 01:19:13,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824376730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:19:13,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:19:13,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:19:13,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730849655] [2023-11-29 01:19:13,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:19:13,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:19:13,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:13,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:19:13,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:19:13,535 INFO L87 Difference]: Start difference. First operand 1453 states and 2214 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:19:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:13,697 INFO L93 Difference]: Finished difference Result 2790 states and 4244 transitions. [2023-11-29 01:19:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:19:13,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 157 [2023-11-29 01:19:13,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:13,706 INFO L225 Difference]: With dead ends: 2790 [2023-11-29 01:19:13,706 INFO L226 Difference]: Without dead ends: 1511 [2023-11-29 01:19:13,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:19:13,708 INFO L413 NwaCegarLoop]: 1367 mSDtfsCounter, 490 mSDsluCounter, 2677 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 4044 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:13,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 4044 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:19:13,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2023-11-29 01:19:13,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1453. [2023-11-29 01:19:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1430 states have (on average 1.5216783216783216) internal successors, (2176), 1435 states have internal predecessors, (2176), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-29 01:19:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 2213 transitions. [2023-11-29 01:19:13,744 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 2213 transitions. Word has length 157 [2023-11-29 01:19:13,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:13,745 INFO L495 AbstractCegarLoop]: Abstraction has 1453 states and 2213 transitions. [2023-11-29 01:19:13,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:19:13,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 2213 transitions. [2023-11-29 01:19:13,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-11-29 01:19:13,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:13,748 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:13,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 01:19:13,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:13,949 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:13,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:13,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1447668167, now seen corresponding path program 1 times [2023-11-29 01:19:13,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:13,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69095211] [2023-11-29 01:19:13,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:13,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:14,040 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:14,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412786583] [2023-11-29 01:19:14,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:14,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:14,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:14,042 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:14,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:19:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:14,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:19:14,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:19:14,652 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:19:14,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:14,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69095211] [2023-11-29 01:19:14,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:19:14,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412786583] [2023-11-29 01:19:14,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412786583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:19:14,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:19:14,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:19:14,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086558309] [2023-11-29 01:19:14,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:19:14,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:19:14,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:14,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:19:14,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:19:14,656 INFO L87 Difference]: Start difference. First operand 1453 states and 2213 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:19:14,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:14,756 INFO L93 Difference]: Finished difference Result 2895 states and 4405 transitions. [2023-11-29 01:19:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:19:14,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 228 [2023-11-29 01:19:14,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:14,766 INFO L225 Difference]: With dead ends: 2895 [2023-11-29 01:19:14,766 INFO L226 Difference]: Without dead ends: 1495 [2023-11-29 01:19:14,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:19:14,769 INFO L413 NwaCegarLoop]: 1351 mSDtfsCounter, 9 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2688 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:14,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2688 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:19:14,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2023-11-29 01:19:14,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1493. [2023-11-29 01:19:14,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1470 states have (on average 1.5074829931972789) internal successors, (2216), 1475 states have internal predecessors, (2216), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-29 01:19:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2253 transitions. [2023-11-29 01:19:14,819 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2253 transitions. Word has length 228 [2023-11-29 01:19:14,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:14,820 INFO L495 AbstractCegarLoop]: Abstraction has 1493 states and 2253 transitions. [2023-11-29 01:19:14,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:19:14,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2253 transitions. [2023-11-29 01:19:14,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-11-29 01:19:14,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:14,825 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:14,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:19:15,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:15,026 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:15,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:15,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1577532745, now seen corresponding path program 1 times [2023-11-29 01:19:15,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:15,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994273941] [2023-11-29 01:19:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:15,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:15,098 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:15,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517122183] [2023-11-29 01:19:15,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:15,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:15,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:15,100 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:15,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:19:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:15,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:19:15,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:19:15,666 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:19:15,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:15,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994273941] [2023-11-29 01:19:15,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:19:15,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517122183] [2023-11-29 01:19:15,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517122183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:19:15,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:19:15,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:19:15,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591253375] [2023-11-29 01:19:15,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:19:15,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:19:15,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:15,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:19:15,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:19:15,669 INFO L87 Difference]: Start difference. First operand 1493 states and 2253 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:19:15,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:15,791 INFO L93 Difference]: Finished difference Result 2889 states and 4370 transitions. [2023-11-29 01:19:15,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:19:15,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 228 [2023-11-29 01:19:15,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:15,800 INFO L225 Difference]: With dead ends: 2889 [2023-11-29 01:19:15,800 INFO L226 Difference]: Without dead ends: 1467 [2023-11-29 01:19:15,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:19:15,803 INFO L413 NwaCegarLoop]: 1344 mSDtfsCounter, 165 mSDsluCounter, 2536 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3880 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:15,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 3880 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:19:15,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2023-11-29 01:19:15,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1465. [2023-11-29 01:19:15,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1442 states have (on average 1.507628294036061) internal successors, (2174), 1447 states have internal predecessors, (2174), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-29 01:19:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2211 transitions. [2023-11-29 01:19:15,848 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2211 transitions. Word has length 228 [2023-11-29 01:19:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:15,848 INFO L495 AbstractCegarLoop]: Abstraction has 1465 states and 2211 transitions. [2023-11-29 01:19:15,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:19:15,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2211 transitions. [2023-11-29 01:19:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-11-29 01:19:15,852 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:15,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:15,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:19:16,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:16,054 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:16,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:16,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1842246843, now seen corresponding path program 1 times [2023-11-29 01:19:16,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:16,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001561772] [2023-11-29 01:19:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:16,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:16,132 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:16,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953345677] [2023-11-29 01:19:16,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:16,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:16,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:16,134 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:16,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:19:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:16,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:19:16,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:19:16,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:19:16,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:16,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001561772] [2023-11-29 01:19:16,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:19:16,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953345677] [2023-11-29 01:19:16,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953345677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:19:16,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:19:16,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:19:16,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839127023] [2023-11-29 01:19:16,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:19:16,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:19:16,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:16,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:19:16,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:19:16,794 INFO L87 Difference]: Start difference. First operand 1465 states and 2211 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:19:16,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:16,903 INFO L93 Difference]: Finished difference Result 3418 states and 5203 transitions. [2023-11-29 01:19:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:19:16,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 228 [2023-11-29 01:19:16,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:16,915 INFO L225 Difference]: With dead ends: 3418 [2023-11-29 01:19:16,916 INFO L226 Difference]: Without dead ends: 2083 [2023-11-29 01:19:16,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:19:16,919 INFO L413 NwaCegarLoop]: 1362 mSDtfsCounter, 725 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 2699 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:16,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 2699 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:19:16,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2023-11-29 01:19:16,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1828. [2023-11-29 01:19:16,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1802 states have (on average 1.5205327413984462) internal successors, (2740), 1807 states have internal predecessors, (2740), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-29 01:19:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 2783 transitions. [2023-11-29 01:19:16,994 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 2783 transitions. Word has length 228 [2023-11-29 01:19:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:16,994 INFO L495 AbstractCegarLoop]: Abstraction has 1828 states and 2783 transitions. [2023-11-29 01:19:16,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:19:16,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 2783 transitions. [2023-11-29 01:19:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2023-11-29 01:19:16,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:16,999 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:17,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:19:17,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:17,200 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:17,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:17,201 INFO L85 PathProgramCache]: Analyzing trace with hash -170142804, now seen corresponding path program 1 times [2023-11-29 01:19:17,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:17,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318644166] [2023-11-29 01:19:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:17,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:17,285 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:17,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107897734] [2023-11-29 01:19:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:17,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:17,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:17,287 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:17,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:19:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:17,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:19:17,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:19:18,037 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:19:18,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:18,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318644166] [2023-11-29 01:19:18,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:19:18,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107897734] [2023-11-29 01:19:18,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107897734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:19:18,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:19:18,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:19:18,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108527751] [2023-11-29 01:19:18,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:19:18,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:19:18,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:18,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:19:18,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:19:18,040 INFO L87 Difference]: Start difference. First operand 1828 states and 2783 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:19:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:18,475 INFO L93 Difference]: Finished difference Result 2989 states and 4549 transitions. [2023-11-29 01:19:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:19:18,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 241 [2023-11-29 01:19:18,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:18,482 INFO L225 Difference]: With dead ends: 2989 [2023-11-29 01:19:18,482 INFO L226 Difference]: Without dead ends: 1454 [2023-11-29 01:19:18,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:19:18,486 INFO L413 NwaCegarLoop]: 1460 mSDtfsCounter, 2420 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2420 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:18,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2420 Valid, 1701 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:19:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2023-11-29 01:19:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1454. [2023-11-29 01:19:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1433 states have (on average 1.5073272854152129) internal successors, (2160), 1438 states have internal predecessors, (2160), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 01:19:18,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 2193 transitions. [2023-11-29 01:19:18,557 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 2193 transitions. Word has length 241 [2023-11-29 01:19:18,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:18,558 INFO L495 AbstractCegarLoop]: Abstraction has 1454 states and 2193 transitions. [2023-11-29 01:19:18,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:19:18,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 2193 transitions. [2023-11-29 01:19:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-11-29 01:19:18,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:18,563 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:18,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 01:19:18,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 01:19:18,763 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:18,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:18,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1618180577, now seen corresponding path program 1 times [2023-11-29 01:19:18,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:18,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729145218] [2023-11-29 01:19:18,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:18,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:18,864 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:18,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366606133] [2023-11-29 01:19:18,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:18,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:18,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:18,866 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:18,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:19:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:19,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 1244 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:19:19,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:19,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:19,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 01:19:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:19:19,758 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:19:19,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:19,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729145218] [2023-11-29 01:19:19,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:19:19,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366606133] [2023-11-29 01:19:19,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366606133] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:19:19,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:19:19,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:19:19,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168125160] [2023-11-29 01:19:19,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:19:19,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:19:19,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:19,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:19:19,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:19:19,761 INFO L87 Difference]: Start difference. First operand 1454 states and 2193 transitions. Second operand has 7 states, 7 states have (on average 33.57142857142857) internal successors, (235), 7 states have internal predecessors, (235), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 01:19:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:20,244 INFO L93 Difference]: Finished difference Result 2642 states and 3991 transitions. [2023-11-29 01:19:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:19:20,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.57142857142857) internal successors, (235), 7 states have internal predecessors, (235), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 251 [2023-11-29 01:19:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:20,252 INFO L225 Difference]: With dead ends: 2642 [2023-11-29 01:19:20,252 INFO L226 Difference]: Without dead ends: 1829 [2023-11-29 01:19:20,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 238 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:19:20,254 INFO L413 NwaCegarLoop]: 1301 mSDtfsCounter, 2174 mSDsluCounter, 4132 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2182 SdHoareTripleChecker+Valid, 5433 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:20,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2182 Valid, 5433 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:19:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2023-11-29 01:19:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1649. [2023-11-29 01:19:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1618 states have (on average 1.5006180469715698) internal successors, (2428), 1627 states have internal predecessors, (2428), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (23), 17 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-29 01:19:20,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2475 transitions. [2023-11-29 01:19:20,326 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2475 transitions. Word has length 251 [2023-11-29 01:19:20,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:20,326 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2475 transitions. [2023-11-29 01:19:20,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.57142857142857) internal successors, (235), 7 states have internal predecessors, (235), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 01:19:20,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2475 transitions. [2023-11-29 01:19:20,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2023-11-29 01:19:20,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:20,331 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:20,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:19:20,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 01:19:20,532 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:20,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:20,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1281283077, now seen corresponding path program 1 times [2023-11-29 01:19:20,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:20,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156945773] [2023-11-29 01:19:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:20,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:20,650 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:20,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447779704] [2023-11-29 01:19:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:20,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:20,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:20,652 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:20,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:19:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:21,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:19:21,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:21,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:19:21,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:21,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 01:19:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 74 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:19:21,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:19:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 74 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:19:21,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:21,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156945773] [2023-11-29 01:19:21,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:19:21,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447779704] [2023-11-29 01:19:21,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447779704] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:19:21,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:19:21,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-29 01:19:21,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66808275] [2023-11-29 01:19:21,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:19:21,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:19:21,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:21,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:19:21,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:19:21,943 INFO L87 Difference]: Start difference. First operand 1649 states and 2475 transitions. Second operand has 9 states, 9 states have (on average 53.111111111111114) internal successors, (478), 9 states have internal predecessors, (478), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:19:22,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:22,377 INFO L93 Difference]: Finished difference Result 4101 states and 6109 transitions. [2023-11-29 01:19:22,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:19:22,378 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 53.111111111111114) internal successors, (478), 9 states have internal predecessors, (478), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 328 [2023-11-29 01:19:22,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:22,390 INFO L225 Difference]: With dead ends: 4101 [2023-11-29 01:19:22,390 INFO L226 Difference]: Without dead ends: 2745 [2023-11-29 01:19:22,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 640 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:19:22,393 INFO L413 NwaCegarLoop]: 1330 mSDtfsCounter, 3297 mSDsluCounter, 5412 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3311 SdHoareTripleChecker+Valid, 6742 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:22,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3311 Valid, 6742 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:19:22,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2023-11-29 01:19:22,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2405. [2023-11-29 01:19:22,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2362 states have (on average 1.4801016088060965) internal successors, (3496), 2371 states have internal predecessors, (3496), 35 states have call successors, (35), 7 states have call predecessors, (35), 7 states have return successors, (34), 28 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-29 01:19:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 3565 transitions. [2023-11-29 01:19:22,458 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 3565 transitions. Word has length 328 [2023-11-29 01:19:22,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:22,458 INFO L495 AbstractCegarLoop]: Abstraction has 2405 states and 3565 transitions. [2023-11-29 01:19:22,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.111111111111114) internal successors, (478), 9 states have internal predecessors, (478), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:19:22,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 3565 transitions. [2023-11-29 01:19:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2023-11-29 01:19:22,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:22,467 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:22,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:19:22,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 01:19:22,668 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:22,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:22,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2107154766, now seen corresponding path program 1 times [2023-11-29 01:19:22,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:22,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10914657] [2023-11-29 01:19:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:22,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:22,955 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:22,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904224066] [2023-11-29 01:19:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:22,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:22,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:22,956 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:22,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:19:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:24,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 3661 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:19:24,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:24,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:19:24,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:24,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:24,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:25,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:25,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 01:19:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 296 proven. 896 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:19:25,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:19:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 296 proven. 896 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:19:25,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:25,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10914657] [2023-11-29 01:19:25,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:19:25,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904224066] [2023-11-29 01:19:25,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904224066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:19:25,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:19:25,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-29 01:19:25,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527834447] [2023-11-29 01:19:25,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:19:25,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:19:25,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:25,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:19:25,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:19:25,843 INFO L87 Difference]: Start difference. First operand 2405 states and 3565 transitions. Second operand has 15 states, 15 states have (on average 91.06666666666666) internal successors, (1366), 15 states have internal predecessors, (1366), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:19:26,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:26,635 INFO L93 Difference]: Finished difference Result 6171 states and 9124 transitions. [2023-11-29 01:19:26,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 01:19:26,636 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 91.06666666666666) internal successors, (1366), 15 states have internal predecessors, (1366), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 772 [2023-11-29 01:19:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:26,655 INFO L225 Difference]: With dead ends: 6171 [2023-11-29 01:19:26,655 INFO L226 Difference]: Without dead ends: 4815 [2023-11-29 01:19:26,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1552 GetRequests, 1522 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:19:26,658 INFO L413 NwaCegarLoop]: 1330 mSDtfsCounter, 7265 mSDsluCounter, 10027 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7303 SdHoareTripleChecker+Valid, 11357 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:26,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7303 Valid, 11357 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:19:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4815 states. [2023-11-29 01:19:26,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4815 to 4475. [2023-11-29 01:19:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4475 states, 4408 states have (on average 1.4655172413793103) internal successors, (6460), 4417 states have internal predecessors, (6460), 59 states have call successors, (59), 7 states have call predecessors, (59), 7 states have return successors, (58), 52 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-29 01:19:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4475 states to 4475 states and 6577 transitions. [2023-11-29 01:19:26,769 INFO L78 Accepts]: Start accepts. Automaton has 4475 states and 6577 transitions. Word has length 772 [2023-11-29 01:19:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:26,770 INFO L495 AbstractCegarLoop]: Abstraction has 4475 states and 6577 transitions. [2023-11-29 01:19:26,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 91.06666666666666) internal successors, (1366), 15 states have internal predecessors, (1366), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:19:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4475 states and 6577 transitions. [2023-11-29 01:19:26,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1661 [2023-11-29 01:19:26,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:26,803 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:26,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 01:19:27,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:19:27,003 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:27,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:27,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1984939680, now seen corresponding path program 2 times [2023-11-29 01:19:27,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:27,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207822629] [2023-11-29 01:19:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:27,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:27,510 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:27,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097910912] [2023-11-29 01:19:27,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:19:27,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:27,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:27,512 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:27,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:19:28,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:19:28,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:19:28,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 01:19:28,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:30,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:19:30,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:19:30,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-29 01:19:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7432 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7432 trivial. 0 not checked. [2023-11-29 01:19:30,788 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:19:30,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:30,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207822629] [2023-11-29 01:19:30,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:19:30,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097910912] [2023-11-29 01:19:30,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097910912] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:19:30,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:19:30,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 01:19:30,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872181864] [2023-11-29 01:19:30,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:19:30,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:19:30,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:30,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:19:30,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:19:30,792 INFO L87 Difference]: Start difference. First operand 4475 states and 6577 transitions. Second operand has 11 states, 11 states have (on average 21.90909090909091) internal successors, (241), 11 states have internal predecessors, (241), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 01:19:32,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:32,488 INFO L93 Difference]: Finished difference Result 5263 states and 7787 transitions. [2023-11-29 01:19:32,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:19:32,488 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 21.90909090909091) internal successors, (241), 11 states have internal predecessors, (241), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1660 [2023-11-29 01:19:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:32,504 INFO L225 Difference]: With dead ends: 5263 [2023-11-29 01:19:32,504 INFO L226 Difference]: Without dead ends: 4512 [2023-11-29 01:19:32,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1666 GetRequests, 1650 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:19:32,506 INFO L413 NwaCegarLoop]: 1331 mSDtfsCounter, 1644 mSDsluCounter, 9211 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 10542 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:32,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1649 Valid, 10542 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1395 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 01:19:32,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4512 states. [2023-11-29 01:19:32,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4512 to 4507. [2023-11-29 01:19:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4507 states, 4440 states have (on average 1.4632882882882883) internal successors, (6497), 4449 states have internal predecessors, (6497), 59 states have call successors, (59), 7 states have call predecessors, (59), 7 states have return successors, (58), 52 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-29 01:19:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4507 states to 4507 states and 6614 transitions. [2023-11-29 01:19:32,644 INFO L78 Accepts]: Start accepts. Automaton has 4507 states and 6614 transitions. Word has length 1660 [2023-11-29 01:19:32,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:32,647 INFO L495 AbstractCegarLoop]: Abstraction has 4507 states and 6614 transitions. [2023-11-29 01:19:32,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.90909090909091) internal successors, (241), 11 states have internal predecessors, (241), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 01:19:32,647 INFO L276 IsEmpty]: Start isEmpty. Operand 4507 states and 6614 transitions. [2023-11-29 01:19:32,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1661 [2023-11-29 01:19:32,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:32,677 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:32,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 01:19:32,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:19:32,877 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:32,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:32,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1434008610, now seen corresponding path program 1 times [2023-11-29 01:19:32,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:32,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004665523] [2023-11-29 01:19:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:32,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:33,494 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:33,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394196345] [2023-11-29 01:19:33,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:33,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:33,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:33,496 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:33,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:19:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:35,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 7763 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:19:35,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7432 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7432 trivial. 0 not checked. [2023-11-29 01:19:36,035 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:19:36,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:36,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004665523] [2023-11-29 01:19:36,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:19:36,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394196345] [2023-11-29 01:19:36,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394196345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:19:36,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:19:36,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:19:36,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945113731] [2023-11-29 01:19:36,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:19:36,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:19:36,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:36,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:19:36,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:19:36,039 INFO L87 Difference]: Start difference. First operand 4507 states and 6614 transitions. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 01:19:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:36,149 INFO L93 Difference]: Finished difference Result 5263 states and 7786 transitions. [2023-11-29 01:19:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:19:36,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1660 [2023-11-29 01:19:36,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:36,157 INFO L225 Difference]: With dead ends: 5263 [2023-11-29 01:19:36,157 INFO L226 Difference]: Without dead ends: 4430 [2023-11-29 01:19:36,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1660 GetRequests, 1657 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:19:36,159 INFO L413 NwaCegarLoop]: 1274 mSDtfsCounter, 77 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 3740 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:36,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 3740 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:19:36,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4430 states. [2023-11-29 01:19:36,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4430 to 4430. [2023-11-29 01:19:36,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 4363 states have (on average 1.462754985101994) internal successors, (6382), 4372 states have internal predecessors, (6382), 59 states have call successors, (59), 7 states have call predecessors, (59), 7 states have return successors, (58), 52 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-29 01:19:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 6499 transitions. [2023-11-29 01:19:36,247 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 6499 transitions. Word has length 1660 [2023-11-29 01:19:36,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:36,249 INFO L495 AbstractCegarLoop]: Abstraction has 4430 states and 6499 transitions. [2023-11-29 01:19:36,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 01:19:36,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 6499 transitions. [2023-11-29 01:19:36,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1662 [2023-11-29 01:19:36,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:36,273 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:36,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:19:36,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:19:36,473 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:36,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:36,474 INFO L85 PathProgramCache]: Analyzing trace with hash -537839821, now seen corresponding path program 1 times [2023-11-29 01:19:36,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:36,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502851701] [2023-11-29 01:19:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:36,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:36,952 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:36,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677567556] [2023-11-29 01:19:36,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:36,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:36,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:36,954 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:36,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:19:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:39,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 7766 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 01:19:39,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:40,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:40,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:40,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:40,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:40,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:40,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:41,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:41,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:41,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:41,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:41,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:19:41,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 01:19:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7432 backedges. 42 proven. 7372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:19:41,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:19:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7432 backedges. 42 proven. 7372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:19:43,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:43,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502851701] [2023-11-29 01:19:43,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:19:43,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677567556] [2023-11-29 01:19:43,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677567556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:19:43,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:19:43,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2023-11-29 01:19:43,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674688194] [2023-11-29 01:19:43,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:19:43,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 01:19:43,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:43,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 01:19:43,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=579, Unknown=0, NotChecked=0, Total=930 [2023-11-29 01:19:43,770 INFO L87 Difference]: Start difference. First operand 4430 states and 6499 transitions. Second operand has 31 states, 31 states have (on average 103.64516129032258) internal successors, (3213), 31 states have internal predecessors, (3213), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:19:48,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:19:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:48,728 INFO L93 Difference]: Finished difference Result 9353 states and 13722 transitions. [2023-11-29 01:19:48,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-29 01:19:48,729 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 103.64516129032258) internal successors, (3213), 31 states have internal predecessors, (3213), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 1661 [2023-11-29 01:19:48,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:48,742 INFO L225 Difference]: With dead ends: 9353 [2023-11-29 01:19:48,742 INFO L226 Difference]: Without dead ends: 8570 [2023-11-29 01:19:48,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3368 GetRequests, 3284 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1698, Invalid=4464, Unknown=0, NotChecked=0, Total=6162 [2023-11-29 01:19:48,746 INFO L413 NwaCegarLoop]: 1227 mSDtfsCounter, 15453 mSDsluCounter, 10115 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15525 SdHoareTripleChecker+Valid, 11342 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:48,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15525 Valid, 11342 Invalid, 665 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [73 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-29 01:19:48,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8570 states. [2023-11-29 01:19:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8570 to 8390. [2023-11-29 01:19:48,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8390 states, 8257 states have (on average 1.4523434661499335) internal successors, (11992), 8266 states have internal predecessors, (11992), 125 states have call successors, (125), 7 states have call predecessors, (125), 7 states have return successors, (124), 118 states have call predecessors, (124), 124 states have call successors, (124) [2023-11-29 01:19:48,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8390 states to 8390 states and 12241 transitions. [2023-11-29 01:19:48,910 INFO L78 Accepts]: Start accepts. Automaton has 8390 states and 12241 transitions. Word has length 1661 [2023-11-29 01:19:48,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:48,911 INFO L495 AbstractCegarLoop]: Abstraction has 8390 states and 12241 transitions. [2023-11-29 01:19:48,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 103.64516129032258) internal successors, (3213), 31 states have internal predecessors, (3213), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:19:48,912 INFO L276 IsEmpty]: Start isEmpty. Operand 8390 states and 12241 transitions. [2023-11-29 01:19:49,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3356 [2023-11-29 01:19:49,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:49,091 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 32, 32, 32, 23, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:49,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:19:49,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:19:49,291 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:49,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:49,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1887754867, now seen corresponding path program 2 times [2023-11-29 01:19:49,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:49,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46335540] [2023-11-29 01:19:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:49,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:50,439 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:50,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228857691] [2023-11-29 01:19:50,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:19:50,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:50,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:50,440 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:50,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:19:52,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:19:52,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:19:52,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 01:19:52,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:53,236 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:19:53,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 22 [2023-11-29 01:20:20,510 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:20:30,093 WARN L293 SmtUtils]: Spent 5.39s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:20:46,963 WARN L293 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:21:03,523 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:21:15,773 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:21:27,997 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:21:40,173 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:21:48,194 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:21:56,218 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:22:04,251 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:22:16,309 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:22:24,335 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:22:32,358 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:22:40,398 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:22:45,833 WARN L293 SmtUtils]: Spent 5.43s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:22:53,856 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:23:01,883 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:23:09,932 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:23:17,961 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:23:30,200 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:23:38,230 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:23:46,721 WARN L293 SmtUtils]: Spent 8.48s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:23:54,753 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:24:02,776 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:24:10,819 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:24:22,988 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:24:31,041 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:24:39,136 WARN L293 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:24:47,270 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:24:59,494 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:25:07,524 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:25:15,569 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:25:23,844 WARN L293 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:25:35,970 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:25:44,003 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:25:52,031 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:26:00,066 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:26:08,095 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:26:16,133 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:26:28,362 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:26:36,410 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:26:44,427 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:26:52,455 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:27:00,487 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:27:08,546 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:27:20,589 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:27:28,610 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:27:36,638 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:27:44,661 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:27:52,695 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:28:00,730 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:28:13,431 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:28:21,476 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:28:29,520 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:28:37,600 WARN L293 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:28:45,621 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:28:50,746 WARN L293 SmtUtils]: Spent 5.08s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:28:58,768 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:29:06,798 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:29:13,464 WARN L293 SmtUtils]: Spent 6.67s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:29:21,481 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:29:29,589 WARN L293 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:29:37,654 WARN L293 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:29:45,757 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:29:57,880 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:30:05,919 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:30:13,950 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:30:22,004 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:30:30,045 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:30:38,096 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:30:50,158 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:30:55,556 WARN L293 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 11 DAG size of output: 1 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:30:59,576 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse9 (mod (+ 2690382803 |c_ULTIMATE.start_main_~_hf_hashv~0#1|) 4294967296))) (and (let ((.cse20 (div (+ 8553987302 (* (- 1) |c_ULTIMATE.start_main_~_hf_hashv~0#1|)) 256))) (let ((.cse21 (div (+ (- 255) .cse20) 256))) (let ((.cse1 (* 257 .cse9)) (.cse2 (* 4294967295 |c_ULTIMATE.start_main_~_hf_hashv~0#1|)) (.cse5 (+ .cse9 4259020262)) (.cse10 (mod (+ (* 255 |c_ULTIMATE.start_main_~_hf_hashv~0#1|) 230) 256)) (.cse11 (div (+ .cse21 (- 255)) 256)) (.cse12 (mod (+ .cse21 1) 256)) (.cse13 (mod (+ 1 .cse20) 256))) (or (exists ((v_z_32 Int)) (and (<= 0 v_z_32) (exists ((v_z_33 Int)) (and (<= 0 v_z_33) (exists ((v_y_27 Int) (v_y_31 Int) (v_y_33 Int)) (let ((.cse8 (* v_y_33 16777216))) (let ((.cse0 (* v_y_27 4294967296)) (.cse7 (* v_y_31 4294967296)) (.cse6 (+ .cse8 .cse9)) (.cse3 (* 65536 v_z_33)) (.cse4 (* v_z_32 256))) (and (= (+ (* 1099511627776 v_y_31) (* 65536 v_z_32) (* v_z_33 16777216) .cse0 1103806595072) (+ (* v_y_33 4294967296) .cse1 (* (mod (+ (* v_y_33 4278190080) .cse2 4276993779 .cse3 .cse4) 4294967296) 256))) (<= (+ .cse0 |c_ULTIMATE.start_main_~_hf_hashv~0#1|) .cse5) (<= (+ 4294967296 .cse3 .cse4) .cse6) (<= .cse6 (+ .cse7 .cse3 8589934591 .cse4)) (<= (+ .cse7 4294967296 .cse3 .cse4) .cse6) (<= (+ .cse8 .cse9 .cse10) (+ .cse3 4294967551 .cse4)) (<= .cse11 (+ v_y_33 254 (* v_y_27 256))))))) (<= (+ v_z_33 .cse12) 255))) (<= (+ v_z_32 .cse13) 255))) (exists ((v_z_32 Int)) (and (exists ((v_z_33 Int)) (and (exists ((v_y_27 Int) (v_y_31 Int) (v_y_33 Int)) (let ((.cse19 (* v_y_33 16777216))) (let ((.cse14 (* v_y_27 4294967296)) (.cse18 (* v_y_31 4294967296)) (.cse17 (+ .cse19 .cse9)) (.cse15 (* 65536 v_z_33)) (.cse16 (* v_z_32 256))) (and (= (+ (* 1099511627776 v_y_31) (* 65536 v_z_32) (* v_z_33 16777216) .cse14 1103806595072) (+ (* v_y_33 4294967296) .cse1 (* (mod (+ (* v_y_33 4278190080) .cse2 4276993779 .cse15 .cse16) 4294967296) 256))) (<= (+ .cse14 |c_ULTIMATE.start_main_~_hf_hashv~0#1|) .cse5) (<= (+ 4294967296 .cse15 .cse16) .cse17) (<= .cse17 (+ .cse18 .cse15 8589934591 .cse16)) (<= (+ .cse18 4294967296 .cse15 .cse16) .cse17) (<= (+ .cse19 .cse9 .cse10) (+ .cse15 4294967551 .cse16)) (<= .cse11 (+ v_y_33 253 (* v_y_27 256))))))) (<= 256 (+ v_z_33 .cse12)) (<= v_z_33 255))) (<= 0 v_z_32) (<= (+ v_z_32 .cse13) 255))))))) (<= 1 .cse9))) is different from false [2023-11-29 01:30:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 43853 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43853 trivial. 0 not checked. [2023-11-29 01:30:59,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:30:59,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:30:59,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46335540] [2023-11-29 01:30:59,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:30:59,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228857691] [2023-11-29 01:30:59,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228857691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:30:59,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:30:59,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 01:30:59,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337259007] [2023-11-29 01:30:59,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:30:59,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 01:30:59,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:30:59,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 01:30:59,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=108, Unknown=1, NotChecked=20, Total=156 [2023-11-29 01:30:59,755 INFO L87 Difference]: Start difference. First operand 8390 states and 12241 transitions. Second operand has 13 states, 13 states have (on average 18.615384615384617) internal successors, (242), 13 states have internal predecessors, (242), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 01:31:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:02,293 INFO L93 Difference]: Finished difference Result 9148 states and 13417 transitions. [2023-11-29 01:31:02,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:31:02,294 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.615384615384617) internal successors, (242), 13 states have internal predecessors, (242), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 3355 [2023-11-29 01:31:02,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:02,315 INFO L225 Difference]: With dead ends: 9148 [2023-11-29 01:31:02,315 INFO L226 Difference]: Without dead ends: 8397 [2023-11-29 01:31:02,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3356 GetRequests, 3343 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=35, Invalid=150, Unknown=1, NotChecked=24, Total=210 [2023-11-29 01:31:02,320 INFO L413 NwaCegarLoop]: 1271 mSDtfsCounter, 9 mSDsluCounter, 10886 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12157 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:02,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 12157 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 683 Invalid, 0 Unknown, 94 Unchecked, 2.2s Time] [2023-11-29 01:31:02,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8397 states. [2023-11-29 01:31:02,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8397 to 8394. [2023-11-29 01:31:02,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8394 states, 8261 states have (on average 1.4521244401404187) internal successors, (11996), 8270 states have internal predecessors, (11996), 125 states have call successors, (125), 7 states have call predecessors, (125), 7 states have return successors, (124), 118 states have call predecessors, (124), 124 states have call successors, (124) [2023-11-29 01:31:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8394 states to 8394 states and 12245 transitions. [2023-11-29 01:31:02,574 INFO L78 Accepts]: Start accepts. Automaton has 8394 states and 12245 transitions. Word has length 3355 [2023-11-29 01:31:02,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:02,577 INFO L495 AbstractCegarLoop]: Abstraction has 8394 states and 12245 transitions. [2023-11-29 01:31:02,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.615384615384617) internal successors, (242), 13 states have internal predecessors, (242), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 01:31:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 8394 states and 12245 transitions. [2023-11-29 01:31:02,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3357 [2023-11-29 01:31:02,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:02,731 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 32, 32, 32, 23, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:02,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 01:31:02,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:02,932 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:31:02,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:02,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1724116807, now seen corresponding path program 1 times [2023-11-29 01:31:02,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:02,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891243308] [2023-11-29 01:31:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:02,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:04,052 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:31:04,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558081452] [2023-11-29 01:31:04,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:04,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:04,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:04,054 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:04,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:31:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:09,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 15795 conjuncts, 104 conjunts are in the unsatisfiable core [2023-11-29 01:31:09,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:09,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:31:09,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:09,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:10,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:10,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:10,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:10,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:10,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:11,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:11,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:11,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:11,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:11,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:11,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:11,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:12,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:12,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:12,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:12,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:12,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:12,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:12,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:12,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:12,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:13,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:13,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:13,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:13,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:13,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:13,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:13,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:13,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:13,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:14,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:31:14,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 01:31:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 43853 backedges. 0 proven. 43835 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:31:14,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:31:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 43853 backedges. 0 proven. 43835 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:31:19,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:19,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891243308] [2023-11-29 01:31:19,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:31:19,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558081452] [2023-11-29 01:31:19,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558081452] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:31:19,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:31:19,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2023-11-29 01:31:19,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805657289] [2023-11-29 01:31:19,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:31:19,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-11-29 01:31:19,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:19,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-11-29 01:31:19,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=2833, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 01:31:19,740 INFO L87 Difference]: Start difference. First operand 8394 states and 12245 transitions. Second operand has 73 states, 73 states have (on average 90.4931506849315) internal successors, (6606), 73 states have internal predecessors, (6606), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:31:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:57,480 INFO L93 Difference]: Finished difference Result 223891 states and 325017 transitions. [2023-11-29 01:31:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2023-11-29 01:31:57,483 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 90.4931506849315) internal successors, (6606), 73 states have internal predecessors, (6606), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 3356 [2023-11-29 01:31:57,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:57,928 INFO L225 Difference]: With dead ends: 223891 [2023-11-29 01:31:57,928 INFO L226 Difference]: Without dead ends: 223104 [2023-11-29 01:31:57,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6778 GetRequests, 6632 SyntacticMatches, 7 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2912 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7286, Invalid=12454, Unknown=0, NotChecked=0, Total=19740 [2023-11-29 01:31:57,961 INFO L413 NwaCegarLoop]: 1230 mSDtfsCounter, 87298 mSDsluCounter, 42349 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87569 SdHoareTripleChecker+Valid, 43579 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:31:57,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87569 Valid, 43579 Invalid, 1479 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [220 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 01:31:58,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223104 states. [2023-11-29 01:32:00,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223104 to 25369. [2023-11-29 01:32:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25369 states, 24991 states have (on average 1.4561642191188828) internal successors, (36391), 25035 states have internal predecessors, (36391), 370 states have call successors, (370), 7 states have call predecessors, (370), 7 states have return successors, (369), 328 states have call predecessors, (369), 369 states have call successors, (369) [2023-11-29 01:32:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25369 states to 25369 states and 37130 transitions. [2023-11-29 01:32:00,172 INFO L78 Accepts]: Start accepts. Automaton has 25369 states and 37130 transitions. Word has length 3356 [2023-11-29 01:32:00,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:00,175 INFO L495 AbstractCegarLoop]: Abstraction has 25369 states and 37130 transitions. [2023-11-29 01:32:00,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 90.4931506849315) internal successors, (6606), 73 states have internal predecessors, (6606), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:32:00,177 INFO L276 IsEmpty]: Start isEmpty. Operand 25369 states and 37130 transitions. [2023-11-29 01:32:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6052 [2023-11-29 01:32:00,616 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:00,618 INFO L195 NwaCegarLoop]: trace histogram [69, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 67, 67, 67, 58, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:32:00,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 01:32:00,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:00,819 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:00,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:00,820 INFO L85 PathProgramCache]: Analyzing trace with hash -909259903, now seen corresponding path program 2 times [2023-11-29 01:32:00,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:00,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323025411] [2023-11-29 01:32:00,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:00,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:02,499 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:02,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652108623] [2023-11-29 01:32:02,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:32:02,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:02,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:02,500 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:02,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:32:07,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:32:07,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:32:07,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:32:07,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 178603 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 178603 trivial. 0 not checked. [2023-11-29 01:32:28,058 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:28,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:28,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323025411] [2023-11-29 01:32:28,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:28,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652108623] [2023-11-29 01:32:28,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652108623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:28,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:28,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:32:28,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542892160] [2023-11-29 01:32:28,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:28,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:28,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:28,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:28,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=30, Unknown=1, NotChecked=0, Total=42 [2023-11-29 01:32:28,064 INFO L87 Difference]: Start difference. First operand 25369 states and 37130 transitions. Second operand has 7 states, 7 states have (on average 34.714285714285715) internal successors, (243), 7 states have internal predecessors, (243), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 01:32:32,681 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 [0] [2023-11-29 01:32:36,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:32:39,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:32:43,389 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 [0] [2023-11-29 01:32:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:44,139 INFO L93 Difference]: Finished difference Result 26117 states and 38289 transitions. [2023-11-29 01:32:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:32:44,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 34.714285714285715) internal successors, (243), 7 states have internal predecessors, (243), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 6051 [2023-11-29 01:32:44,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:44,183 INFO L225 Difference]: With dead ends: 26117 [2023-11-29 01:32:44,183 INFO L226 Difference]: Without dead ends: 25374 [2023-11-29 01:32:44,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6051 GetRequests, 6045 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=15, Invalid=40, Unknown=1, NotChecked=0, Total=56 [2023-11-29 01:32:44,192 INFO L413 NwaCegarLoop]: 1273 mSDtfsCounter, 11 mSDsluCounter, 6086 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7359 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:44,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7359 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 354 Invalid, 2 Unknown, 0 Unchecked, 15.4s Time] [2023-11-29 01:32:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25374 states. [2023-11-29 01:32:45,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25374 to 25369. [2023-11-29 01:32:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25369 states, 24991 states have (on average 1.4561642191188828) internal successors, (36391), 25035 states have internal predecessors, (36391), 370 states have call successors, (370), 7 states have call predecessors, (370), 7 states have return successors, (369), 328 states have call predecessors, (369), 369 states have call successors, (369) [2023-11-29 01:32:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25369 states to 25369 states and 37130 transitions. [2023-11-29 01:32:45,109 INFO L78 Accepts]: Start accepts. Automaton has 25369 states and 37130 transitions. Word has length 6051 [2023-11-29 01:32:45,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:45,113 INFO L495 AbstractCegarLoop]: Abstraction has 25369 states and 37130 transitions. [2023-11-29 01:32:45,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.714285714285715) internal successors, (243), 7 states have internal predecessors, (243), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 01:32:45,114 INFO L276 IsEmpty]: Start isEmpty. Operand 25369 states and 37130 transitions. [2023-11-29 01:32:45,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6053 [2023-11-29 01:32:45,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:45,538 INFO L195 NwaCegarLoop]: trace histogram [69, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 67, 67, 67, 58, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:32:45,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:32:45,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 01:32:45,739 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:45,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:45,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1014012362, now seen corresponding path program 1 times [2023-11-29 01:32:45,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:45,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207096605] [2023-11-29 01:32:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:45,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:47,794 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:47,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327201168] [2023-11-29 01:32:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:47,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:47,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:47,796 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:47,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95acedf2-9729-4554-b09c-7509a4288cff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:32:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:58,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 28573 conjuncts, 209 conjunts are in the unsatisfiable core [2023-11-29 01:32:58,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:58,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:32:58,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:32:58,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:32:58,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:32:59,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:32:59,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:32:59,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:32:59,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:32:59,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:00,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:00,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:00,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:00,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:00,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:00,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:00,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:01,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:01,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:01,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:01,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:01,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:01,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:01,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:01,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:01,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:02,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:02,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:02,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:02,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:02,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:02,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:02,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:03,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:03,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:03,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:03,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:03,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:03,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:03,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:03,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:04,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:04,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:04,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:04,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:04,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:04,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:04,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:05,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:05,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:05,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:05,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:05,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:05,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:05,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:06,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:06,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:06,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:06,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:06,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:06,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:06,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:07,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:07,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:07,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:07,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:07,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:07,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:07,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:08,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:33:08,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 01:33:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 178603 backedges. 0 proven. 178585 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:33:08,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:33:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 178603 backedges. 0 proven. 178585 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:33:20,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:20,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207096605] [2023-11-29 01:33:20,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:20,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327201168] [2023-11-29 01:33:20,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327201168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:33:20,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:33:20,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 143 [2023-11-29 01:33:20,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054256667] [2023-11-29 01:33:20,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:33:20,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2023-11-29 01:33:20,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:20,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2023-11-29 01:33:20,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9738, Invalid=10568, Unknown=0, NotChecked=0, Total=20306 [2023-11-29 01:33:20,987 INFO L87 Difference]: Start difference. First operand 25369 states and 37130 transitions. Second operand has 143 states, 143 states have (on average 83.8951048951049) internal successors, (11997), 143 states have internal predecessors, (11997), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)