./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-80.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/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_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-80.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/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_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/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 966ea2a538a0dd4c2c006f74d4b4efc854ff5cb08807c191240adc70e2bc9a84 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:00:14,057 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:00:14,189 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:00:14,198 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:00:14,199 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:00:14,243 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:00:14,245 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:00:14,245 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:00:14,247 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:00:14,255 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:00:14,255 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:00:14,257 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:00:14,258 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:00:14,260 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:00:14,260 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:00:14,261 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:00:14,261 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:00:14,262 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:00:14,262 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:00:14,263 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:00:14,263 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:00:14,264 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:00:14,265 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:00:14,265 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:00:14,266 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:00:14,266 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:00:14,266 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:00:14,268 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:00:14,268 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:00:14,269 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:00:14,270 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:00:14,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:00:14,271 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:00:14,271 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:00:14,271 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:00:14,272 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:00:14,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:00:14,272 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:00:14,272 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:00:14,273 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:00:14,273 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:00:14,273 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:00:14,274 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_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 966ea2a538a0dd4c2c006f74d4b4efc854ff5cb08807c191240adc70e2bc9a84 [2023-11-26 12:00:14,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:00:14,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:00:14,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:00:14,633 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:00:14,634 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:00:14,635 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-80.i [2023-11-26 12:00:17,929 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:00:18,214 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:00:18,215 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-80.i [2023-11-26 12:00:18,230 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/data/b3957a23b/04fcbdfeddcf4dd98c466808333d44e7/FLAG3c497fa70 [2023-11-26 12:00:18,247 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/data/b3957a23b/04fcbdfeddcf4dd98c466808333d44e7 [2023-11-26 12:00:18,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:00:18,252 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:00:18,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:00:18,254 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:00:18,261 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:00:18,262 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:00:18" (1/1) ... [2023-11-26 12:00:18,263 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2752d28f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:18, skipping insertion in model container [2023-11-26 12:00:18,264 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:00:18" (1/1) ... [2023-11-26 12:00:18,315 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:00:18,516 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_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-80.i[916,929] [2023-11-26 12:00:18,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:00:18,707 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:00:18,727 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_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-80.i[916,929] [2023-11-26 12:00:18,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:00:18,905 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:00:18,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:18 WrapperNode [2023-11-26 12:00:18,906 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:00:18,907 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:00:18,908 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:00:18,908 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:00:18,917 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:18" (1/1) ... [2023-11-26 12:00:18,943 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:18" (1/1) ... [2023-11-26 12:00:19,072 INFO L138 Inliner]: procedures = 26, calls = 85, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 486 [2023-11-26 12:00:19,073 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:00:19,073 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:00:19,074 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:00:19,074 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:00:19,088 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:18" (1/1) ... [2023-11-26 12:00:19,088 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:18" (1/1) ... [2023-11-26 12:00:19,117 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:18" (1/1) ... [2023-11-26 12:00:19,163 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 12:00:19,173 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:18" (1/1) ... [2023-11-26 12:00:19,173 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:18" (1/1) ... [2023-11-26 12:00:19,203 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:18" (1/1) ... [2023-11-26 12:00:19,209 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:18" (1/1) ... [2023-11-26 12:00:19,231 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:18" (1/1) ... [2023-11-26 12:00:19,239 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:18" (1/1) ... [2023-11-26 12:00:19,249 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:00:19,250 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:00:19,250 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:00:19,250 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:00:19,251 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:18" (1/1) ... [2023-11-26 12:00:19,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:00:19,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:19,296 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:00:19,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:00:19,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:00:19,344 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 12:00:19,345 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 12:00:19,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:00:19,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:00:19,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:00:19,494 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:00:19,496 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:00:20,453 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:00:20,532 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:00:20,532 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 12:00:20,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:20 BoogieIcfgContainer [2023-11-26 12:00:20,533 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:00:20,536 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:00:20,539 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:00:20,542 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:00:20,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:00:18" (1/3) ... [2023-11-26 12:00:20,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331c23cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:00:20, skipping insertion in model container [2023-11-26 12:00:20,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:18" (2/3) ... [2023-11-26 12:00:20,544 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331c23cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:00:20, skipping insertion in model container [2023-11-26 12:00:20,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:20" (3/3) ... [2023-11-26 12:00:20,546 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-80.i [2023-11-26 12:00:20,563 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:00:20,563 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:00:20,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:00:20,633 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;@1d10da0f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:00:20,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:00:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 192 states, 117 states have (on average 1.547008547008547) internal successors, (181), 118 states have internal predecessors, (181), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-26 12:00:20,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-26 12:00:20,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:20,674 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:20,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:20,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:20,684 INFO L85 PathProgramCache]: Analyzing trace with hash 963417548, now seen corresponding path program 1 times [2023-11-26 12:00:20,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:20,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024461802] [2023-11-26 12:00:20,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:20,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:21,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:21,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024461802] [2023-11-26 12:00:21,174 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 12:00:21,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952202272] [2023-11-26 12:00:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:21,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:21,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:21,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:21,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:00:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:21,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 12:00:21,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 10082 trivial. 0 not checked. [2023-11-26 12:00:21,723 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:21,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952202272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:21,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:21,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:00:21,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407990107] [2023-11-26 12:00:21,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:21,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 12:00:21,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:21,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 12:00:21,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:00:21,780 INFO L87 Difference]: Start difference. First operand has 192 states, 117 states have (on average 1.547008547008547) internal successors, (181), 118 states have internal predecessors, (181), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) Second operand has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-26 12:00:21,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:21,863 INFO L93 Difference]: Finished difference Result 381 states and 720 transitions. [2023-11-26 12:00:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 12:00:21,866 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) Word has length 454 [2023-11-26 12:00:21,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:21,880 INFO L225 Difference]: With dead ends: 381 [2023-11-26 12:00:21,880 INFO L226 Difference]: Without dead ends: 190 [2023-11-26 12:00:21,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 453 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 12:00:21,892 INFO L413 NwaCegarLoop]: 316 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, 316 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 12:00:21,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 316 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-26 12:00:21,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2023-11-26 12:00:21,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 116 states have (on average 1.5086206896551724) internal successors, (175), 116 states have internal predecessors, (175), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-26 12:00:21,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 319 transitions. [2023-11-26 12:00:21,979 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 319 transitions. Word has length 454 [2023-11-26 12:00:21,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:21,980 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 319 transitions. [2023-11-26 12:00:21,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-26 12:00:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 319 transitions. [2023-11-26 12:00:22,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-26 12:00:22,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:22,009 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:22,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:22,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 12:00:22,218 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:22,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:22,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1288480570, now seen corresponding path program 1 times [2023-11-26 12:00:22,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:22,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034293514] [2023-11-26 12:00:22,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:22,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:22,430 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:22,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547635036] [2023-11-26 12:00:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:22,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:22,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:22,440 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:22,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:00:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:22,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:00:22,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-26 12:00:22,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:22,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:22,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034293514] [2023-11-26 12:00:22,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:22,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547635036] [2023-11-26 12:00:22,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547635036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:22,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:22,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:00:22,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453273886] [2023-11-26 12:00:22,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:22,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:22,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:22,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:22,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:22,964 INFO L87 Difference]: Start difference. First operand 190 states and 319 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 12:00:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:23,040 INFO L93 Difference]: Finished difference Result 379 states and 637 transitions. [2023-11-26 12:00:23,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:23,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 454 [2023-11-26 12:00:23,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:23,047 INFO L225 Difference]: With dead ends: 379 [2023-11-26 12:00:23,048 INFO L226 Difference]: Without dead ends: 190 [2023-11-26 12:00:23,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 452 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 12:00:23,051 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 18 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:23,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 609 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:23,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-26 12:00:23,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2023-11-26 12:00:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 116 states have (on average 1.5) internal successors, (174), 116 states have internal predecessors, (174), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-26 12:00:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 318 transitions. [2023-11-26 12:00:23,082 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 318 transitions. Word has length 454 [2023-11-26 12:00:23,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:23,086 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 318 transitions. [2023-11-26 12:00:23,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 12:00:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 318 transitions. [2023-11-26 12:00:23,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-26 12:00:23,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:23,098 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:23,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:23,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:23,306 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:23,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:23,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1989545148, now seen corresponding path program 1 times [2023-11-26 12:00:23,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:23,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594448084] [2023-11-26 12:00:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:23,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:23,404 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:23,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368977009] [2023-11-26 12:00:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:23,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:23,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:23,407 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:23,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:00:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:23,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 12:00:23,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-26 12:00:23,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:23,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:23,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594448084] [2023-11-26 12:00:23,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:23,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368977009] [2023-11-26 12:00:23,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368977009] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:23,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:23,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:00:23,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111977500] [2023-11-26 12:00:23,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:23,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:00:23,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:23,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:00:23,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:23,866 INFO L87 Difference]: Start difference. First operand 190 states and 318 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 12:00:23,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:23,931 INFO L93 Difference]: Finished difference Result 379 states and 635 transitions. [2023-11-26 12:00:23,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:00:23,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 454 [2023-11-26 12:00:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:23,936 INFO L225 Difference]: With dead ends: 379 [2023-11-26 12:00:23,937 INFO L226 Difference]: Without dead ends: 190 [2023-11-26 12:00:23,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:00:23,939 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 330 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:23,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 607 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:23,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-26 12:00:23,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2023-11-26 12:00:23,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 116 states have (on average 1.4913793103448276) internal successors, (173), 116 states have internal predecessors, (173), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-26 12:00:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 317 transitions. [2023-11-26 12:00:23,973 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 317 transitions. Word has length 454 [2023-11-26 12:00:23,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:23,975 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 317 transitions. [2023-11-26 12:00:23,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 12:00:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 317 transitions. [2023-11-26 12:00:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-26 12:00:23,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:23,981 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:23,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 12:00:24,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:24,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:24,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:24,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1309486778, now seen corresponding path program 1 times [2023-11-26 12:00:24,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:24,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627168390] [2023-11-26 12:00:24,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:24,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:24,268 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:24,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512681503] [2023-11-26 12:00:24,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:24,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:24,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:24,270 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:24,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:00:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:24,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:00:24,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-26 12:00:24,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:24,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:24,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627168390] [2023-11-26 12:00:24,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:24,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512681503] [2023-11-26 12:00:24,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512681503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:24,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:24,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:00:24,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974393905] [2023-11-26 12:00:24,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:24,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:24,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:24,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:24,735 INFO L87 Difference]: Start difference. First operand 190 states and 317 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 12:00:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:24,826 INFO L93 Difference]: Finished difference Result 495 states and 829 transitions. [2023-11-26 12:00:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:24,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 454 [2023-11-26 12:00:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:24,833 INFO L225 Difference]: With dead ends: 495 [2023-11-26 12:00:24,833 INFO L226 Difference]: Without dead ends: 306 [2023-11-26 12:00:24,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 452 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 12:00:24,838 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 190 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:24,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 694 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-11-26 12:00:24,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 303. [2023-11-26 12:00:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 199 states have (on average 1.5427135678391959) internal successors, (307), 200 states have internal predecessors, (307), 101 states have call successors, (101), 2 states have call predecessors, (101), 2 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-26 12:00:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 509 transitions. [2023-11-26 12:00:24,934 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 509 transitions. Word has length 454 [2023-11-26 12:00:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:24,938 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 509 transitions. [2023-11-26 12:00:24,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 12:00:24,939 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 509 transitions. [2023-11-26 12:00:24,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-26 12:00:24,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:24,945 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:24,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:25,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:25,154 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:25,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:25,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1414982534, now seen corresponding path program 1 times [2023-11-26 12:00:25,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:25,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831555151] [2023-11-26 12:00:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:25,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:25,247 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:25,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334824538] [2023-11-26 12:00:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:25,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:25,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:25,250 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:25,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:00:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:25,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:00:25,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 1023 proven. 9 refuted. 0 times theorem prover too weak. 9192 trivial. 0 not checked. [2023-11-26 12:00:25,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 204 proven. 9 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-26 12:00:26,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:26,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831555151] [2023-11-26 12:00:26,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:26,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334824538] [2023-11-26 12:00:26,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334824538] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:26,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:00:26,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 12:00:26,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584559239] [2023-11-26 12:00:26,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:26,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:00:26,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:26,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:00:26,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:00:26,169 INFO L87 Difference]: Start difference. First operand 303 states and 509 transitions. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 2 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) [2023-11-26 12:00:26,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:26,830 INFO L93 Difference]: Finished difference Result 615 states and 1026 transitions. [2023-11-26 12:00:26,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 12:00:26,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 2 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) Word has length 454 [2023-11-26 12:00:26,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:26,836 INFO L225 Difference]: With dead ends: 615 [2023-11-26 12:00:26,837 INFO L226 Difference]: Without dead ends: 313 [2023-11-26 12:00:26,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 900 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 12:00:26,839 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 335 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:26,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 557 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 12:00:26,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-11-26 12:00:26,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 307. [2023-11-26 12:00:26,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 202 states have (on average 1.5148514851485149) internal successors, (306), 203 states have internal predecessors, (306), 101 states have call successors, (101), 3 states have call predecessors, (101), 3 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-26 12:00:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 508 transitions. [2023-11-26 12:00:26,888 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 508 transitions. Word has length 454 [2023-11-26 12:00:26,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:26,889 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 508 transitions. [2023-11-26 12:00:26,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 2 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) [2023-11-26 12:00:26,890 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 508 transitions. [2023-11-26 12:00:26,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-26 12:00:26,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:26,911 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:26,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 12:00:27,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:27,132 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:27,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:27,132 INFO L85 PathProgramCache]: Analyzing trace with hash 135118856, now seen corresponding path program 1 times [2023-11-26 12:00:27,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:27,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38326545] [2023-11-26 12:00:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:27,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:27,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:27,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553218952] [2023-11-26 12:00:27,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:27,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:27,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:27,239 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:27,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:00:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:27,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:00:27,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-26 12:00:27,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:27,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:27,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38326545] [2023-11-26 12:00:27,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:27,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553218952] [2023-11-26 12:00:27,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553218952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:27,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:27,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:00:27,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558622875] [2023-11-26 12:00:27,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:27,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:00:27,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:27,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:00:27,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:27,801 INFO L87 Difference]: Start difference. First operand 307 states and 508 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 12:00:28,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:28,378 INFO L93 Difference]: Finished difference Result 852 states and 1409 transitions. [2023-11-26 12:00:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:00:28,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 454 [2023-11-26 12:00:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:28,385 INFO L225 Difference]: With dead ends: 852 [2023-11-26 12:00:28,386 INFO L226 Difference]: Without dead ends: 546 [2023-11-26 12:00:28,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:00:28,389 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 369 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:28,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 772 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 12:00:28,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-11-26 12:00:28,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 341. [2023-11-26 12:00:28,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 235 states have (on average 1.553191489361702) internal successors, (365), 236 states have internal predecessors, (365), 101 states have call successors, (101), 4 states have call predecessors, (101), 4 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-26 12:00:28,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 567 transitions. [2023-11-26 12:00:28,489 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 567 transitions. Word has length 454 [2023-11-26 12:00:28,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:28,490 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 567 transitions. [2023-11-26 12:00:28,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 12:00:28,491 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 567 transitions. [2023-11-26 12:00:28,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-26 12:00:28,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:28,495 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:28,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:28,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:28,705 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:28,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:28,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1236688442, now seen corresponding path program 1 times [2023-11-26 12:00:28,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:28,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654630978] [2023-11-26 12:00:28,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:28,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:28,778 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:28,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931680408] [2023-11-26 12:00:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:28,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:28,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:28,780 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:28,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:00:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:29,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:00:29,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-26 12:00:29,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:29,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:29,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654630978] [2023-11-26 12:00:29,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:29,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931680408] [2023-11-26 12:00:29,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931680408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:29,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:29,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:00:29,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010586607] [2023-11-26 12:00:29,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:29,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:29,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:29,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:29,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:29,893 INFO L87 Difference]: Start difference. First operand 341 states and 567 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 12:00:30,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:30,043 INFO L93 Difference]: Finished difference Result 1009 states and 1677 transitions. [2023-11-26 12:00:30,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:30,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 454 [2023-11-26 12:00:30,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:30,052 INFO L225 Difference]: With dead ends: 1009 [2023-11-26 12:00:30,052 INFO L226 Difference]: Without dead ends: 669 [2023-11-26 12:00:30,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 452 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 12:00:30,057 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 88 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:30,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 628 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:00:30,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2023-11-26 12:00:30,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 667. [2023-11-26 12:00:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 456 states have (on average 1.5263157894736843) internal successors, (696), 458 states have internal predecessors, (696), 202 states have call successors, (202), 8 states have call predecessors, (202), 8 states have return successors, (202), 200 states have call predecessors, (202), 202 states have call successors, (202) [2023-11-26 12:00:30,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1100 transitions. [2023-11-26 12:00:30,174 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1100 transitions. Word has length 454 [2023-11-26 12:00:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:30,176 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 1100 transitions. [2023-11-26 12:00:30,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 12:00:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1100 transitions. [2023-11-26 12:00:30,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-26 12:00:30,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:30,181 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:30,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:30,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:30,390 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:30,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:30,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1369335112, now seen corresponding path program 1 times [2023-11-26 12:00:30,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:30,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064197638] [2023-11-26 12:00:30,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:30,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:30,461 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:30,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351633041] [2023-11-26 12:00:30,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:30,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:30,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:30,463 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:30,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:00:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:30,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 12:00:30,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-26 12:00:31,540 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:31,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:31,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064197638] [2023-11-26 12:00:31,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:31,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351633041] [2023-11-26 12:00:31,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351633041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:31,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:31,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:00:31,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383305631] [2023-11-26 12:00:31,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:31,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:00:31,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:31,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:00:31,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:31,544 INFO L87 Difference]: Start difference. First operand 667 states and 1100 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 12:00:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:31,779 INFO L93 Difference]: Finished difference Result 1333 states and 2199 transitions. [2023-11-26 12:00:31,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:00:31,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 454 [2023-11-26 12:00:31,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:31,786 INFO L225 Difference]: With dead ends: 1333 [2023-11-26 12:00:31,787 INFO L226 Difference]: Without dead ends: 667 [2023-11-26 12:00:31,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:31,790 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 295 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:31,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 324 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:00:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2023-11-26 12:00:31,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 667. [2023-11-26 12:00:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 456 states have (on average 1.4912280701754386) internal successors, (680), 458 states have internal predecessors, (680), 202 states have call successors, (202), 8 states have call predecessors, (202), 8 states have return successors, (202), 200 states have call predecessors, (202), 202 states have call successors, (202) [2023-11-26 12:00:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1084 transitions. [2023-11-26 12:00:31,937 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1084 transitions. Word has length 454 [2023-11-26 12:00:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:31,938 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 1084 transitions. [2023-11-26 12:00:31,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-26 12:00:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1084 transitions. [2023-11-26 12:00:31,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-26 12:00:31,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:31,945 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:31,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:32,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:32,154 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:32,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:32,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1898103851, now seen corresponding path program 1 times [2023-11-26 12:00:32,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:32,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36549493] [2023-11-26 12:00:32,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:32,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:32,236 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:32,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768547033] [2023-11-26 12:00:32,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:32,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:32,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:32,238 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:32,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 12:00:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:32,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 12:00:32,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5249 proven. 348 refuted. 0 times theorem prover too weak. 4627 trivial. 0 not checked. [2023-11-26 12:00:34,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 360 proven. 270 refuted. 0 times theorem prover too weak. 9594 trivial. 0 not checked. [2023-11-26 12:00:36,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:36,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36549493] [2023-11-26 12:00:36,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:36,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768547033] [2023-11-26 12:00:36,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768547033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:36,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:00:36,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-11-26 12:00:36,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973596316] [2023-11-26 12:00:36,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:36,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 12:00:36,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:36,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 12:00:36,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2023-11-26 12:00:36,246 INFO L87 Difference]: Start difference. First operand 667 states and 1084 transitions. Second operand has 25 states, 24 states have (on average 7.0) internal successors, (168), 22 states have internal predecessors, (168), 8 states have call successors, (104), 5 states have call predecessors, (104), 9 states have return successors, (105), 8 states have call predecessors, (105), 8 states have call successors, (105) [2023-11-26 12:00:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:41,485 INFO L93 Difference]: Finished difference Result 2809 states and 4453 transitions. [2023-11-26 12:00:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-26 12:00:41,487 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 7.0) internal successors, (168), 22 states have internal predecessors, (168), 8 states have call successors, (104), 5 states have call predecessors, (104), 9 states have return successors, (105), 8 states have call predecessors, (105), 8 states have call successors, (105) Word has length 456 [2023-11-26 12:00:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:41,503 INFO L225 Difference]: With dead ends: 2809 [2023-11-26 12:00:41,504 INFO L226 Difference]: Without dead ends: 2143 [2023-11-26 12:00:41,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 967 GetRequests, 894 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1391, Invalid=4159, Unknown=0, NotChecked=0, Total=5550 [2023-11-26 12:00:41,510 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 1076 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:41,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 1448 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-26 12:00:41,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2023-11-26 12:00:41,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1395. [2023-11-26 12:00:41,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 958 states have (on average 1.4634655532359082) internal successors, (1402), 962 states have internal predecessors, (1402), 404 states have call successors, (404), 32 states have call predecessors, (404), 32 states have return successors, (404), 400 states have call predecessors, (404), 404 states have call successors, (404) [2023-11-26 12:00:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 2210 transitions. [2023-11-26 12:00:41,913 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 2210 transitions. Word has length 456 [2023-11-26 12:00:41,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:41,914 INFO L495 AbstractCegarLoop]: Abstraction has 1395 states and 2210 transitions. [2023-11-26 12:00:41,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 7.0) internal successors, (168), 22 states have internal predecessors, (168), 8 states have call successors, (104), 5 states have call predecessors, (104), 9 states have return successors, (105), 8 states have call predecessors, (105), 8 states have call successors, (105) [2023-11-26 12:00:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 2210 transitions. [2023-11-26 12:00:41,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-26 12:00:41,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:41,921 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:41,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:42,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:42,130 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:42,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:42,131 INFO L85 PathProgramCache]: Analyzing trace with hash 2038652461, now seen corresponding path program 1 times [2023-11-26 12:00:42,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:42,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052229583] [2023-11-26 12:00:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:42,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:42,192 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:42,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771903320] [2023-11-26 12:00:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:42,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:42,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:42,194 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:42,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 12:00:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:42,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 12:00:42,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5073 proven. 90 refuted. 0 times theorem prover too weak. 5061 trivial. 0 not checked. [2023-11-26 12:00:43,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 123 proven. 90 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-26 12:00:44,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:44,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052229583] [2023-11-26 12:00:44,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:44,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771903320] [2023-11-26 12:00:44,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771903320] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:44,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:00:44,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-26 12:00:44,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212585832] [2023-11-26 12:00:44,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:44,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 12:00:44,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:44,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 12:00:44,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-26 12:00:44,609 INFO L87 Difference]: Start difference. First operand 1395 states and 2210 transitions. Second operand has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) [2023-11-26 12:00:46,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:46,659 INFO L93 Difference]: Finished difference Result 4993 states and 7801 transitions. [2023-11-26 12:00:46,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 12:00:46,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) Word has length 456 [2023-11-26 12:00:46,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:46,691 INFO L225 Difference]: With dead ends: 4993 [2023-11-26 12:00:46,691 INFO L226 Difference]: Without dead ends: 3599 [2023-11-26 12:00:46,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 902 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 12:00:46,699 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 692 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:46,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 867 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 12:00:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3599 states. [2023-11-26 12:00:47,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3599 to 2779. [2023-11-26 12:00:47,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 1906 states have (on average 1.4575026232948582) internal successors, (2778), 1914 states have internal predecessors, (2778), 808 states have call successors, (808), 64 states have call predecessors, (808), 64 states have return successors, (808), 800 states have call predecessors, (808), 808 states have call successors, (808) [2023-11-26 12:00:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 4394 transitions. [2023-11-26 12:00:47,431 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 4394 transitions. Word has length 456 [2023-11-26 12:00:47,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:47,432 INFO L495 AbstractCegarLoop]: Abstraction has 2779 states and 4394 transitions. [2023-11-26 12:00:47,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) [2023-11-26 12:00:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 4394 transitions. [2023-11-26 12:00:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-26 12:00:47,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:47,438 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:47,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:47,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 12:00:47,647 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:47,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:47,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1274839269, now seen corresponding path program 1 times [2023-11-26 12:00:47,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:47,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421574632] [2023-11-26 12:00:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:47,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:47,784 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:47,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465786003] [2023-11-26 12:00:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:47,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:47,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:47,796 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:47,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 12:00:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:48,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 12:00:48,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5153 proven. 114 refuted. 0 times theorem prover too weak. 4957 trivial. 0 not checked. [2023-11-26 12:00:48,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 99 proven. 114 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-26 12:00:49,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:49,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421574632] [2023-11-26 12:00:49,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:49,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465786003] [2023-11-26 12:00:49,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465786003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:49,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:00:49,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-26 12:00:49,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459690042] [2023-11-26 12:00:49,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:49,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 12:00:49,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:49,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 12:00:49,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 12:00:49,361 INFO L87 Difference]: Start difference. First operand 2779 states and 4394 transitions. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 2 states have call successors, (110), 2 states have call predecessors, (110), 4 states have return successors, (111), 2 states have call predecessors, (111), 2 states have call successors, (111) [2023-11-26 12:00:52,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:52,358 INFO L93 Difference]: Finished difference Result 7373 states and 11633 transitions. [2023-11-26 12:00:52,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 12:00:52,359 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 2 states have call successors, (110), 2 states have call predecessors, (110), 4 states have return successors, (111), 2 states have call predecessors, (111), 2 states have call successors, (111) Word has length 456 [2023-11-26 12:00:52,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:52,389 INFO L225 Difference]: With dead ends: 7373 [2023-11-26 12:00:52,390 INFO L226 Difference]: Without dead ends: 4315 [2023-11-26 12:00:52,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 904 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2023-11-26 12:00:52,401 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 603 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:52,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 1219 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-26 12:00:52,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2023-11-26 12:00:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 4191. [2023-11-26 12:00:53,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4191 states, 2870 states have (on average 1.4376306620209058) internal successors, (4126), 2882 states have internal predecessors, (4126), 1212 states have call successors, (1212), 108 states have call predecessors, (1212), 108 states have return successors, (1212), 1200 states have call predecessors, (1212), 1212 states have call successors, (1212) [2023-11-26 12:00:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4191 states to 4191 states and 6550 transitions. [2023-11-26 12:00:53,551 INFO L78 Accepts]: Start accepts. Automaton has 4191 states and 6550 transitions. Word has length 456 [2023-11-26 12:00:53,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:53,552 INFO L495 AbstractCegarLoop]: Abstraction has 4191 states and 6550 transitions. [2023-11-26 12:00:53,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 2 states have call successors, (110), 2 states have call predecessors, (110), 4 states have return successors, (111), 2 states have call predecessors, (111), 2 states have call successors, (111) [2023-11-26 12:00:53,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4191 states and 6550 transitions. [2023-11-26 12:00:53,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-26 12:00:53,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:53,560 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:53,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:53,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:53,772 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:53,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2027776997, now seen corresponding path program 1 times [2023-11-26 12:00:53,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:53,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28384759] [2023-11-26 12:00:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:53,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:53,830 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:53,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165345861] [2023-11-26 12:00:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:53,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:53,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:53,832 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:53,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 12:00:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:54,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 12:00:54,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5153 proven. 114 refuted. 0 times theorem prover too weak. 4957 trivial. 0 not checked. [2023-11-26 12:00:55,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:56,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:56,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28384759] [2023-11-26 12:00:56,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:00:56,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165345861] [2023-11-26 12:00:56,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165345861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:56,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:00:56,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-11-26 12:00:56,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005486240] [2023-11-26 12:00:56,009 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:56,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:00:56,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:56,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:00:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:00:56,012 INFO L87 Difference]: Start difference. First operand 4191 states and 6550 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 5 states have internal predecessors, (105), 2 states have call successors, (72), 2 states have call predecessors, (72), 3 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-26 12:00:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:57,117 INFO L93 Difference]: Finished difference Result 5639 states and 8784 transitions. [2023-11-26 12:00:57,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 12:00:57,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 5 states have internal predecessors, (105), 2 states have call successors, (72), 2 states have call predecessors, (72), 3 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) Word has length 456 [2023-11-26 12:00:57,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:57,139 INFO L225 Difference]: With dead ends: 5639 [2023-11-26 12:00:57,139 INFO L226 Difference]: Without dead ends: 2853 [2023-11-26 12:00:57,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 714 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:00:57,149 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 164 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:57,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1267 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:00:57,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2853 states. [2023-11-26 12:00:57,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2853 to 2811. [2023-11-26 12:00:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2811 states, 1930 states have (on average 1.4352331606217616) internal successors, (2770), 1938 states have internal predecessors, (2770), 808 states have call successors, (808), 72 states have call predecessors, (808), 72 states have return successors, (808), 800 states have call predecessors, (808), 808 states have call successors, (808) [2023-11-26 12:00:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 4386 transitions. [2023-11-26 12:00:57,914 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 4386 transitions. Word has length 456 [2023-11-26 12:00:57,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:57,914 INFO L495 AbstractCegarLoop]: Abstraction has 2811 states and 4386 transitions. [2023-11-26 12:00:57,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 5 states have internal predecessors, (105), 2 states have call successors, (72), 2 states have call predecessors, (72), 3 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-26 12:00:57,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 4386 transitions. [2023-11-26 12:00:57,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-26 12:00:57,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:57,920 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:57,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:58,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 12:00:58,128 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:00:58,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:58,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1188392695, now seen corresponding path program 1 times [2023-11-26 12:00:58,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:58,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135641191] [2023-11-26 12:00:58,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:58,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:58,182 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:00:58,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246073396] [2023-11-26 12:00:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:58,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:58,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:58,184 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:58,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a3dcd2-1c3f-41a5-9e91-d5f04076dc6d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 12:00:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:58,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:00:58,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-26 12:01:00,041 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:01:00,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:00,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135641191] [2023-11-26 12:01:00,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:01:00,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246073396] [2023-11-26 12:01:00,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246073396] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:00,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:01:00,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:01:00,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981574093] [2023-11-26 12:01:00,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:00,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:01:00,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:00,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:01:00,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:01:00,045 INFO L87 Difference]: Start difference. First operand 2811 states and 4386 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72)