./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-13.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-13.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme --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 3aed15da12260a7de82b1d58a50eef3670797f2722612a66426441482ea1c194 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:56:05,923 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:56:06,021 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:56:06,027 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:56:06,028 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:56:06,054 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:56:06,059 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:56:06,059 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:56:06,060 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:56:06,063 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:56:06,064 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:56:06,065 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:56:06,065 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:56:06,070 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:56:06,072 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:56:06,072 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:56:06,073 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:56:06,073 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:56:06,074 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:56:06,074 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:56:06,075 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:56:06,075 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:56:06,076 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:56:06,076 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:56:06,077 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:56:06,077 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:56:06,078 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:56:06,079 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:56:06,079 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:56:06,080 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:56:06,081 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:56:06,082 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:56:06,082 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:56:06,082 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:56:06,083 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:56:06,083 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:56:06,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:56:06,084 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:56:06,084 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:56:06,084 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:56:06,084 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:56:06,085 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:56:06,085 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_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3aed15da12260a7de82b1d58a50eef3670797f2722612a66426441482ea1c194 [2023-11-26 11:56:06,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:56:06,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:56:06,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:56:06,518 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:56:06,518 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:56:06,520 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-13.i [2023-11-26 11:56:09,743 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:56:10,042 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:56:10,043 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-13.i [2023-11-26 11:56:10,063 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/data/4ea9ad258/104ad3f3865a45a1ab3607291059133e/FLAGfa99dc854 [2023-11-26 11:56:10,082 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/data/4ea9ad258/104ad3f3865a45a1ab3607291059133e [2023-11-26 11:56:10,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:56:10,088 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:56:10,089 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:56:10,090 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:56:10,097 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:56:10,098 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:56:10" (1/1) ... [2023-11-26 11:56:10,099 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a092817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:10, skipping insertion in model container [2023-11-26 11:56:10,100 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:56:10" (1/1) ... [2023-11-26 11:56:10,156 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:56:10,353 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_1f3522da-4ee7-48de-98c3-27a3b2e99848/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-13.i[916,929] [2023-11-26 11:56:10,581 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:56:10,602 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:56:10,616 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_1f3522da-4ee7-48de-98c3-27a3b2e99848/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-13.i[916,929] [2023-11-26 11:56:10,697 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:56:10,733 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:56:10,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:10 WrapperNode [2023-11-26 11:56:10,734 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:56:10,766 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:56:10,767 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:56:10,767 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:56:10,782 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:10" (1/1) ... [2023-11-26 11:56:10,805 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:10" (1/1) ... [2023-11-26 11:56:10,900 INFO L138 Inliner]: procedures = 26, calls = 96, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 585 [2023-11-26 11:56:10,901 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:56:10,902 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:56:10,902 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:56:10,902 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:56:10,915 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:10" (1/1) ... [2023-11-26 11:56:10,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:10" (1/1) ... [2023-11-26 11:56:10,923 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:10" (1/1) ... [2023-11-26 11:56:10,981 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:56:10,981 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:10" (1/1) ... [2023-11-26 11:56:10,982 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:10" (1/1) ... [2023-11-26 11:56:11,006 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:10" (1/1) ... [2023-11-26 11:56:11,013 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:10" (1/1) ... [2023-11-26 11:56:11,018 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:10" (1/1) ... [2023-11-26 11:56:11,025 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:10" (1/1) ... [2023-11-26 11:56:11,040 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:56:11,041 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:56:11,041 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:56:11,042 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:56:11,043 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:10" (1/1) ... [2023-11-26 11:56:11,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:56:11,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:11,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:56:11,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:56:11,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:56:11,140 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:56:11,141 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:56:11,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:56:11,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:56:11,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:56:11,342 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:56:11,345 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:56:12,343 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:56:12,438 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:56:12,438 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:56:12,439 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:56:12 BoogieIcfgContainer [2023-11-26 11:56:12,439 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:56:12,443 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:56:12,443 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:56:12,447 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:56:12,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:56:10" (1/3) ... [2023-11-26 11:56:12,449 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4733b693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:56:12, skipping insertion in model container [2023-11-26 11:56:12,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:10" (2/3) ... [2023-11-26 11:56:12,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4733b693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:56:12, skipping insertion in model container [2023-11-26 11:56:12,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:56:12" (3/3) ... [2023-11-26 11:56:12,453 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-13.i [2023-11-26 11:56:12,473 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:56:12,473 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:56:12,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:56:12,561 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;@8fbe17c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:56:12,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:56:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand has 226 states, 140 states have (on average 1.5714285714285714) internal successors, (220), 141 states have internal predecessors, (220), 83 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2023-11-26 11:56:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-11-26 11:56:12,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:12,631 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:12,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:12,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:12,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1011271138, now seen corresponding path program 1 times [2023-11-26 11:56:12,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:12,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951770363] [2023-11-26 11:56:12,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:12,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:13,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:13,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951770363] [2023-11-26 11:56:13,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:56:13,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629558634] [2023-11-26 11:56:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:13,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:13,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:13,263 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:13,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:56:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:13,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:56:13,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 13448 trivial. 0 not checked. [2023-11-26 11:56:13,907 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:13,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629558634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:13,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:13,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:56:13,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201398286] [2023-11-26 11:56:13,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:13,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:56:13,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:13,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:56:13,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:56:13,992 INFO L87 Difference]: Start difference. First operand has 226 states, 140 states have (on average 1.5714285714285714) internal successors, (220), 141 states have internal predecessors, (220), 83 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) Second operand has 2 states, 2 states have (on average 55.5) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (83), 2 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 2 states have call successors, (83) [2023-11-26 11:56:14,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:14,097 INFO L93 Difference]: Finished difference Result 448 states and 851 transitions. [2023-11-26 11:56:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:56:14,101 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 55.5) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (83), 2 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 2 states have call successors, (83) Word has length 521 [2023-11-26 11:56:14,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:14,114 INFO L225 Difference]: With dead ends: 448 [2023-11-26 11:56:14,115 INFO L226 Difference]: Without dead ends: 223 [2023-11-26 11:56:14,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:56:14,127 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:14,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 374 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:56:14,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-11-26 11:56:14,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2023-11-26 11:56:14,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 138 states have (on average 1.5289855072463767) internal successors, (211), 138 states have internal predecessors, (211), 83 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2023-11-26 11:56:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 377 transitions. [2023-11-26 11:56:14,270 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 377 transitions. Word has length 521 [2023-11-26 11:56:14,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:14,273 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 377 transitions. [2023-11-26 11:56:14,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 55.5) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (83), 2 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 2 states have call successors, (83) [2023-11-26 11:56:14,274 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 377 transitions. [2023-11-26 11:56:14,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-11-26 11:56:14,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:14,292 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:14,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:14,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:56:14,501 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:14,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:14,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1730990232, now seen corresponding path program 1 times [2023-11-26 11:56:14,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:14,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120089293] [2023-11-26 11:56:14,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:14,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:14,665 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:14,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780308108] [2023-11-26 11:56:14,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:14,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:14,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:14,675 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:14,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:56:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:15,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:56:15,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-26 11:56:15,388 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:15,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:15,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120089293] [2023-11-26 11:56:15,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:15,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780308108] [2023-11-26 11:56:15,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780308108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:15,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:15,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:56:15,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647963104] [2023-11-26 11:56:15,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:15,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:56:15,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:15,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:56:15,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:15,401 INFO L87 Difference]: Start difference. First operand 223 states and 377 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-26 11:56:15,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:15,548 INFO L93 Difference]: Finished difference Result 660 states and 1115 transitions. [2023-11-26 11:56:15,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:56:15,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 521 [2023-11-26 11:56:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:15,560 INFO L225 Difference]: With dead ends: 660 [2023-11-26 11:56:15,560 INFO L226 Difference]: Without dead ends: 438 [2023-11-26 11:56:15,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:15,564 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 337 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:15,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 739 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:56:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-11-26 11:56:15,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 436. [2023-11-26 11:56:15,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 267 states have (on average 1.4943820224719102) internal successors, (399), 267 states have internal predecessors, (399), 166 states have call successors, (166), 2 states have call predecessors, (166), 2 states have return successors, (166), 166 states have call predecessors, (166), 166 states have call successors, (166) [2023-11-26 11:56:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 731 transitions. [2023-11-26 11:56:15,703 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 731 transitions. Word has length 521 [2023-11-26 11:56:15,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:15,707 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 731 transitions. [2023-11-26 11:56:15,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-26 11:56:15,708 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 731 transitions. [2023-11-26 11:56:15,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-26 11:56:15,726 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:15,727 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:15,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:15,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:15,938 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:15,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:15,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1553671721, now seen corresponding path program 1 times [2023-11-26 11:56:15,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:15,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449771576] [2023-11-26 11:56:15,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:15,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:16,076 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:16,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455756252] [2023-11-26 11:56:16,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:16,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:16,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:16,081 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:16,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:56:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:16,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:56:16,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-26 11:56:16,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:16,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:16,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449771576] [2023-11-26 11:56:16,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:16,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455756252] [2023-11-26 11:56:16,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455756252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:16,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:16,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:56:16,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583697033] [2023-11-26 11:56:16,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:16,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:56:16,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:16,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:56:16,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:16,637 INFO L87 Difference]: Start difference. First operand 436 states and 731 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-26 11:56:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:16,714 INFO L93 Difference]: Finished difference Result 931 states and 1546 transitions. [2023-11-26 11:56:16,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:56:16,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 522 [2023-11-26 11:56:16,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:16,721 INFO L225 Difference]: With dead ends: 931 [2023-11-26 11:56:16,722 INFO L226 Difference]: Without dead ends: 496 [2023-11-26 11:56:16,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:16,725 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 36 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:16,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 769 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:56:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2023-11-26 11:56:16,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 492. [2023-11-26 11:56:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 309 states have (on average 1.4724919093851132) internal successors, (455), 311 states have internal predecessors, (455), 178 states have call successors, (178), 4 states have call predecessors, (178), 4 states have return successors, (178), 176 states have call predecessors, (178), 178 states have call successors, (178) [2023-11-26 11:56:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 811 transitions. [2023-11-26 11:56:16,819 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 811 transitions. Word has length 522 [2023-11-26 11:56:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:16,821 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 811 transitions. [2023-11-26 11:56:16,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-26 11:56:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 811 transitions. [2023-11-26 11:56:16,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-26 11:56:16,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:16,831 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:16,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 11:56:17,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:17,039 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:17,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:17,040 INFO L85 PathProgramCache]: Analyzing trace with hash 542554471, now seen corresponding path program 1 times [2023-11-26 11:56:17,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:17,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018043698] [2023-11-26 11:56:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:17,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:17,119 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:17,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026600523] [2023-11-26 11:56:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:17,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:17,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:17,121 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:17,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:56:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:17,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:56:17,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-26 11:56:18,383 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:18,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:18,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018043698] [2023-11-26 11:56:18,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:18,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026600523] [2023-11-26 11:56:18,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026600523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:18,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:18,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:56:18,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350093213] [2023-11-26 11:56:18,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:18,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:56:18,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:18,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:56:18,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:56:18,387 INFO L87 Difference]: Start difference. First operand 492 states and 811 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 6 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-26 11:56:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:18,966 INFO L93 Difference]: Finished difference Result 1612 states and 2624 transitions. [2023-11-26 11:56:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:56:18,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 6 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 522 [2023-11-26 11:56:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:18,979 INFO L225 Difference]: With dead ends: 1612 [2023-11-26 11:56:18,979 INFO L226 Difference]: Without dead ends: 1121 [2023-11-26 11:56:18,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:56:18,985 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 479 mSDsluCounter, 1823 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:18,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 2187 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:56:18,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2023-11-26 11:56:19,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1049. [2023-11-26 11:56:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 684 states have (on average 1.4649122807017543) internal successors, (1002), 688 states have internal predecessors, (1002), 356 states have call successors, (356), 8 states have call predecessors, (356), 8 states have return successors, (356), 352 states have call predecessors, (356), 356 states have call successors, (356) [2023-11-26 11:56:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1714 transitions. [2023-11-26 11:56:19,240 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1714 transitions. Word has length 522 [2023-11-26 11:56:19,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:19,242 INFO L495 AbstractCegarLoop]: Abstraction has 1049 states and 1714 transitions. [2023-11-26 11:56:19,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 6 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-26 11:56:19,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1714 transitions. [2023-11-26 11:56:19,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-26 11:56:19,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:19,248 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:19,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:19,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:19,456 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:19,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash 800719909, now seen corresponding path program 1 times [2023-11-26 11:56:19,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:19,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471176013] [2023-11-26 11:56:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:19,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:19,529 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:19,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408699828] [2023-11-26 11:56:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:19,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:19,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:19,531 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:19,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:56:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:19,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:56:19,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 6778 proven. 138 refuted. 0 times theorem prover too weak. 6696 trivial. 0 not checked. [2023-11-26 11:56:21,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 108 proven. 138 refuted. 0 times theorem prover too weak. 13366 trivial. 0 not checked. [2023-11-26 11:56:22,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:22,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471176013] [2023-11-26 11:56:22,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:22,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408699828] [2023-11-26 11:56:22,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408699828] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:22,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:56:22,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-26 11:56:22,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337105668] [2023-11-26 11:56:22,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:22,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:56:22,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:22,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:56:22,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:56:22,245 INFO L87 Difference]: Start difference. First operand 1049 states and 1714 transitions. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 4 states have call successors, (166), 3 states have call predecessors, (166), 5 states have return successors, (166), 4 states have call predecessors, (166), 4 states have call successors, (166) [2023-11-26 11:56:24,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:24,308 INFO L93 Difference]: Finished difference Result 3727 states and 5997 transitions. [2023-11-26 11:56:24,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:56:24,310 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 4 states have call successors, (166), 3 states have call predecessors, (166), 5 states have return successors, (166), 4 states have call predecessors, (166), 4 states have call successors, (166) Word has length 522 [2023-11-26 11:56:24,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:24,336 INFO L225 Difference]: With dead ends: 3727 [2023-11-26 11:56:24,336 INFO L226 Difference]: Without dead ends: 2679 [2023-11-26 11:56:24,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 1034 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:56:24,344 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 998 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 1410 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:24,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 1410 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-26 11:56:24,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2023-11-26 11:56:24,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 2639. [2023-11-26 11:56:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 1730 states have (on average 1.4346820809248555) internal successors, (2482), 1746 states have internal predecessors, (2482), 880 states have call successors, (880), 28 states have call predecessors, (880), 28 states have return successors, (880), 864 states have call predecessors, (880), 880 states have call successors, (880) [2023-11-26 11:56:25,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 4242 transitions. [2023-11-26 11:56:25,038 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 4242 transitions. Word has length 522 [2023-11-26 11:56:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:25,041 INFO L495 AbstractCegarLoop]: Abstraction has 2639 states and 4242 transitions. [2023-11-26 11:56:25,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 4 states have call successors, (166), 3 states have call predecessors, (166), 5 states have return successors, (166), 4 states have call predecessors, (166), 4 states have call successors, (166) [2023-11-26 11:56:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 4242 transitions. [2023-11-26 11:56:25,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-26 11:56:25,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:25,051 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:25,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 11:56:25,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:25,260 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:25,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:25,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1004718425, now seen corresponding path program 1 times [2023-11-26 11:56:25,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:25,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330148936] [2023-11-26 11:56:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:25,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:25,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:25,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491924228] [2023-11-26 11:56:25,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:25,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:25,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:25,365 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:25,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:56:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:25,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:56:25,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 5556 proven. 177 refuted. 0 times theorem prover too weak. 7879 trivial. 0 not checked. [2023-11-26 11:56:26,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 69 proven. 177 refuted. 0 times theorem prover too weak. 13366 trivial. 0 not checked. [2023-11-26 11:56:26,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:26,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330148936] [2023-11-26 11:56:26,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:26,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491924228] [2023-11-26 11:56:26,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491924228] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:26,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:56:26,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:56:26,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940985519] [2023-11-26 11:56:26,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:26,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:56:26,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:26,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:56:26,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:56:26,906 INFO L87 Difference]: Start difference. First operand 2639 states and 4242 transitions. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 2 states have call successors, (142), 2 states have call predecessors, (142), 4 states have return successors, (143), 2 states have call predecessors, (143), 2 states have call successors, (143) [2023-11-26 11:56:27,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:27,774 INFO L93 Difference]: Finished difference Result 3743 states and 5999 transitions. [2023-11-26 11:56:27,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:56:27,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 2 states have call successors, (142), 2 states have call predecessors, (142), 4 states have return successors, (143), 2 states have call predecessors, (143), 2 states have call successors, (143) Word has length 522 [2023-11-26 11:56:27,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:27,790 INFO L225 Difference]: With dead ends: 3743 [2023-11-26 11:56:27,790 INFO L226 Difference]: Without dead ends: 1105 [2023-11-26 11:56:27,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 1036 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:56:27,802 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 491 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:27,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 671 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:56:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2023-11-26 11:56:28,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1081. [2023-11-26 11:56:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 708 states have (on average 1.423728813559322) internal successors, (1008), 712 states have internal predecessors, (1008), 356 states have call successors, (356), 16 states have call predecessors, (356), 16 states have return successors, (356), 352 states have call predecessors, (356), 356 states have call successors, (356) [2023-11-26 11:56:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1720 transitions. [2023-11-26 11:56:28,055 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1720 transitions. Word has length 522 [2023-11-26 11:56:28,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:28,057 INFO L495 AbstractCegarLoop]: Abstraction has 1081 states and 1720 transitions. [2023-11-26 11:56:28,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 2 states have call successors, (142), 2 states have call predecessors, (142), 4 states have return successors, (143), 2 states have call predecessors, (143), 2 states have call successors, (143) [2023-11-26 11:56:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1720 transitions. [2023-11-26 11:56:28,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-26 11:56:28,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:28,065 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:28,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:28,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:28,275 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:28,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:28,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1459715747, now seen corresponding path program 1 times [2023-11-26 11:56:28,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:28,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599897874] [2023-11-26 11:56:28,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:28,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:28,376 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:28,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636490194] [2023-11-26 11:56:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:28,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:28,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:28,378 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:28,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:56:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:28,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:56:28,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-26 11:56:31,220 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:31,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:31,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599897874] [2023-11-26 11:56:31,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:31,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636490194] [2023-11-26 11:56:31,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636490194] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:31,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:31,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:56:31,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288001888] [2023-11-26 11:56:31,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:31,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:56:31,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:31,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:56:31,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:56:31,225 INFO L87 Difference]: Start difference. First operand 1081 states and 1720 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-26 11:56:31,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:31,856 INFO L93 Difference]: Finished difference Result 2533 states and 4039 transitions. [2023-11-26 11:56:31,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:56:31,857 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 522 [2023-11-26 11:56:31,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:31,869 INFO L225 Difference]: With dead ends: 2533 [2023-11-26 11:56:31,869 INFO L226 Difference]: Without dead ends: 1453 [2023-11-26 11:56:31,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:56:31,874 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 324 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:31,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1639 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:56:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2023-11-26 11:56:32,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1349. [2023-11-26 11:56:32,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 890 states have (on average 1.448314606741573) internal successors, (1289), 894 states have internal predecessors, (1289), 439 states have call successors, (439), 19 states have call predecessors, (439), 19 states have return successors, (439), 435 states have call predecessors, (439), 439 states have call successors, (439) [2023-11-26 11:56:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 2167 transitions. [2023-11-26 11:56:32,178 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 2167 transitions. Word has length 522 [2023-11-26 11:56:32,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:32,179 INFO L495 AbstractCegarLoop]: Abstraction has 1349 states and 2167 transitions. [2023-11-26 11:56:32,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-26 11:56:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 2167 transitions. [2023-11-26 11:56:32,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-26 11:56:32,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:32,185 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:32,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:32,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:32,397 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:32,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:32,398 INFO L85 PathProgramCache]: Analyzing trace with hash 180481955, now seen corresponding path program 1 times [2023-11-26 11:56:32,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:32,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405006039] [2023-11-26 11:56:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:32,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:32,517 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:32,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091996721] [2023-11-26 11:56:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:32,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:32,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:32,519 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:32,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:56:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:32,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:56:32,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-26 11:56:33,010 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:33,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:33,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405006039] [2023-11-26 11:56:33,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:33,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091996721] [2023-11-26 11:56:33,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091996721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:33,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:33,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:56:33,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260094882] [2023-11-26 11:56:33,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:33,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:56:33,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:33,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:56:33,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:33,015 INFO L87 Difference]: Start difference. First operand 1349 states and 2167 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-26 11:56:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:33,239 INFO L93 Difference]: Finished difference Result 2569 states and 4095 transitions. [2023-11-26 11:56:33,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:56:33,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 522 [2023-11-26 11:56:33,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:33,253 INFO L225 Difference]: With dead ends: 2569 [2023-11-26 11:56:33,253 INFO L226 Difference]: Without dead ends: 1489 [2023-11-26 11:56:33,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:33,259 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 18 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:33,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 718 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:56:33,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2023-11-26 11:56:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1455. [2023-11-26 11:56:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 996 states have (on average 1.4548192771084338) internal successors, (1449), 1000 states have internal predecessors, (1449), 439 states have call successors, (439), 19 states have call predecessors, (439), 19 states have return successors, (439), 435 states have call predecessors, (439), 439 states have call successors, (439) [2023-11-26 11:56:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 2327 transitions. [2023-11-26 11:56:33,562 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 2327 transitions. Word has length 522 [2023-11-26 11:56:33,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:33,564 INFO L495 AbstractCegarLoop]: Abstraction has 1455 states and 2327 transitions. [2023-11-26 11:56:33,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-26 11:56:33,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 2327 transitions. [2023-11-26 11:56:33,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-26 11:56:33,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:33,571 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:33,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:33,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:56:33,781 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:33,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:33,781 INFO L85 PathProgramCache]: Analyzing trace with hash 180541537, now seen corresponding path program 1 times [2023-11-26 11:56:33,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:33,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494783645] [2023-11-26 11:56:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:33,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:33,873 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:33,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134825498] [2023-11-26 11:56:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:33,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:33,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:33,878 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:33,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:56:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:34,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:56:34,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 408 proven. 243 refuted. 0 times theorem prover too weak. 12961 trivial. 0 not checked. [2023-11-26 11:56:35,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 3 proven. 243 refuted. 0 times theorem prover too weak. 13366 trivial. 0 not checked. [2023-11-26 11:56:35,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:35,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494783645] [2023-11-26 11:56:35,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:35,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134825498] [2023-11-26 11:56:35,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134825498] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:35,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:56:35,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-26 11:56:35,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830224494] [2023-11-26 11:56:35,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:35,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:56:35,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:35,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:56:35,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:56:35,863 INFO L87 Difference]: Start difference. First operand 1455 states and 2327 transitions. Second operand has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 3 states have call successors, (164), 2 states have call predecessors, (164), 4 states have return successors, (165), 3 states have call predecessors, (165), 3 states have call successors, (165) [2023-11-26 11:56:37,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:37,141 INFO L93 Difference]: Finished difference Result 3285 states and 5107 transitions. [2023-11-26 11:56:37,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:56:37,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 3 states have call successors, (164), 2 states have call predecessors, (164), 4 states have return successors, (165), 3 states have call predecessors, (165), 3 states have call successors, (165) Word has length 522 [2023-11-26 11:56:37,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:37,158 INFO L225 Difference]: With dead ends: 3285 [2023-11-26 11:56:37,158 INFO L226 Difference]: Without dead ends: 2099 [2023-11-26 11:56:37,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1052 GetRequests, 1033 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:56:37,166 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 588 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:37,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1233 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:56:37,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2023-11-26 11:56:37,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 1531. [2023-11-26 11:56:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1063 states have (on average 1.4336782690498588) internal successors, (1524), 1067 states have internal predecessors, (1524), 439 states have call successors, (439), 28 states have call predecessors, (439), 28 states have return successors, (439), 435 states have call predecessors, (439), 439 states have call successors, (439) [2023-11-26 11:56:37,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 2402 transitions. [2023-11-26 11:56:37,534 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 2402 transitions. Word has length 522 [2023-11-26 11:56:37,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:37,535 INFO L495 AbstractCegarLoop]: Abstraction has 1531 states and 2402 transitions. [2023-11-26 11:56:37,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 3 states have call successors, (164), 2 states have call predecessors, (164), 4 states have return successors, (165), 3 states have call predecessors, (165), 3 states have call successors, (165) [2023-11-26 11:56:37,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 2402 transitions. [2023-11-26 11:56:37,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-26 11:56:37,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:37,542 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:37,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:37,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 11:56:37,751 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:37,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:37,751 INFO L85 PathProgramCache]: Analyzing trace with hash 438706975, now seen corresponding path program 1 times [2023-11-26 11:56:37,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:37,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153432735] [2023-11-26 11:56:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:37,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:37,813 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:37,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251583777] [2023-11-26 11:56:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:37,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:37,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:37,815 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:37,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:56:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:38,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:56:38,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13612 trivial. 0 not checked. [2023-11-26 11:56:40,219 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:40,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:40,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153432735] [2023-11-26 11:56:40,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:56:40,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251583777] [2023-11-26 11:56:40,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251583777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:40,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:40,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:56:40,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80555574] [2023-11-26 11:56:40,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:40,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:56:40,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:40,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:56:40,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:56:40,224 INFO L87 Difference]: Start difference. First operand 1531 states and 2402 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-26 11:56:40,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:56:40,859 INFO L93 Difference]: Finished difference Result 2981 states and 4626 transitions. [2023-11-26 11:56:40,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:56:40,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) Word has length 522 [2023-11-26 11:56:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:56:40,874 INFO L225 Difference]: With dead ends: 2981 [2023-11-26 11:56:40,874 INFO L226 Difference]: Without dead ends: 1723 [2023-11-26 11:56:40,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:56:40,879 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 318 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:56:40,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 1640 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:56:40,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2023-11-26 11:56:41,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1533. [2023-11-26 11:56:41,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1065 states have (on average 1.4328638497652582) internal successors, (1526), 1069 states have internal predecessors, (1526), 439 states have call successors, (439), 28 states have call predecessors, (439), 28 states have return successors, (439), 435 states have call predecessors, (439), 439 states have call successors, (439) [2023-11-26 11:56:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2404 transitions. [2023-11-26 11:56:41,152 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2404 transitions. Word has length 522 [2023-11-26 11:56:41,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:56:41,153 INFO L495 AbstractCegarLoop]: Abstraction has 1533 states and 2404 transitions. [2023-11-26 11:56:41,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 1 states have call successors, (83), 1 states have call predecessors, (83), 1 states have return successors, (83), 1 states have call predecessors, (83), 1 states have call successors, (83) [2023-11-26 11:56:41,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2404 transitions. [2023-11-26 11:56:41,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-26 11:56:41,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:56:41,160 INFO L195 NwaCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:41,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:41,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:56:41,369 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:56:41,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:41,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1842532928, now seen corresponding path program 1 times [2023-11-26 11:56:41,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:41,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425576218] [2023-11-26 11:56:41,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:41,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:41,441 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:56:41,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998582433] [2023-11-26 11:56:41,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:41,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:41,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:41,443 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:41,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3522da-4ee7-48de-98c3-27a3b2e99848/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:56:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:41,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 11:56:41,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 8076 proven. 288 refuted. 0 times theorem prover too weak. 5248 trivial. 0 not checked. [2023-11-26 11:56:44,859 INFO L327 TraceCheckSpWp]: Computing backward predicates...