./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-57.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_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/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_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-57.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/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_37126465-feb4-4b66-b45d-89e46aa08bc7/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 85317af79e2001c8e1b318bf68e7fdcd0f9e26e9789b5022a63d412f2c352aaf --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:48:13,124 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:48:13,240 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:48:13,245 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:48:13,246 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:48:13,274 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:48:13,275 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:48:13,276 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:48:13,277 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:48:13,277 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:48:13,278 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:48:13,279 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:48:13,280 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:48:13,280 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:48:13,281 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:48:13,282 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:48:13,282 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:48:13,283 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:48:13,283 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:48:13,284 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:48:13,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:48:13,287 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:48:13,287 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:48:13,288 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:48:13,288 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:48:13,289 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:48:13,289 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:48:13,300 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:48:13,301 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:48:13,301 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:48:13,303 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:48:13,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:48:13,304 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:48:13,304 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:48:13,305 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:48:13,305 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:48:13,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:48:13,305 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:48:13,306 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:48:13,306 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:48:13,306 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:48:13,306 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:48:13,307 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_37126465-feb4-4b66-b45d-89e46aa08bc7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85317af79e2001c8e1b318bf68e7fdcd0f9e26e9789b5022a63d412f2c352aaf [2023-11-26 10:48:13,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:48:13,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:48:13,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:48:13,682 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:48:13,683 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:48:13,684 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-57.i [2023-11-26 10:48:16,844 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:48:17,223 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:48:17,224 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-57.i [2023-11-26 10:48:17,242 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/data/aed0a1ddc/07a1faf59d9c4959bf3e054951cb2c7a/FLAG969c7af06 [2023-11-26 10:48:17,256 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/data/aed0a1ddc/07a1faf59d9c4959bf3e054951cb2c7a [2023-11-26 10:48:17,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:48:17,260 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:48:17,262 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:48:17,262 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:48:17,277 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:48:17,278 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:48:17" (1/1) ... [2023-11-26 10:48:17,282 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@303ea4dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:17, skipping insertion in model container [2023-11-26 10:48:17,283 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:48:17" (1/1) ... [2023-11-26 10:48:17,333 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:48:17,516 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_37126465-feb4-4b66-b45d-89e46aa08bc7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-57.i[916,929] [2023-11-26 10:48:17,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:48:17,840 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:48:17,857 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_37126465-feb4-4b66-b45d-89e46aa08bc7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-57.i[916,929] [2023-11-26 10:48:17,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:48:17,974 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:48:17,975 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:17 WrapperNode [2023-11-26 10:48:17,975 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:48:17,976 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:48:17,976 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:48:17,976 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:48:17,984 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:17" (1/1) ... [2023-11-26 10:48:18,008 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:17" (1/1) ... [2023-11-26 10:48:18,151 INFO L138 Inliner]: procedures = 26, calls = 126, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 921 [2023-11-26 10:48:18,152 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:48:18,153 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:48:18,153 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:48:18,153 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:48:18,167 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:17" (1/1) ... [2023-11-26 10:48:18,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:17" (1/1) ... [2023-11-26 10:48:18,191 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:17" (1/1) ... [2023-11-26 10:48:18,269 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 10:48:18,270 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:17" (1/1) ... [2023-11-26 10:48:18,270 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:17" (1/1) ... [2023-11-26 10:48:18,304 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:17" (1/1) ... [2023-11-26 10:48:18,314 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:17" (1/1) ... [2023-11-26 10:48:18,322 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:17" (1/1) ... [2023-11-26 10:48:18,333 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:17" (1/1) ... [2023-11-26 10:48:18,350 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:48:18,351 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:48:18,351 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:48:18,351 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:48:18,352 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:17" (1/1) ... [2023-11-26 10:48:18,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:48:18,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:18,395 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:48:18,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:48:18,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:48:18,440 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:48:18,441 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:48:18,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:48:18,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:48:18,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:48:18,646 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:48:18,649 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:48:20,087 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:48:20,165 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:48:20,165 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:48:20,166 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:48:20 BoogieIcfgContainer [2023-11-26 10:48:20,166 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:48:20,170 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:48:20,171 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:48:20,174 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:48:20,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:48:17" (1/3) ... [2023-11-26 10:48:20,175 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b48ff8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:48:20, skipping insertion in model container [2023-11-26 10:48:20,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:17" (2/3) ... [2023-11-26 10:48:20,177 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b48ff8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:48:20, skipping insertion in model container [2023-11-26 10:48:20,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:48:20" (3/3) ... [2023-11-26 10:48:20,179 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-57.i [2023-11-26 10:48:20,198 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:48:20,198 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:48:20,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:48:20,314 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;@424ee570, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:48:20,314 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:48:20,336 INFO L276 IsEmpty]: Start isEmpty. Operand has 345 states, 229 states have (on average 1.6331877729257642) internal successors, (374), 230 states have internal predecessors, (374), 113 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2023-11-26 10:48:20,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-26 10:48:20,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:20,453 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:20,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:20,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:20,463 INFO L85 PathProgramCache]: Analyzing trace with hash 127803526, now seen corresponding path program 1 times [2023-11-26 10:48:20,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:20,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466218387] [2023-11-26 10:48:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:20,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:20,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:20,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466218387] [2023-11-26 10:48:20,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:48:20,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265606903] [2023-11-26 10:48:20,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:20,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:20,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:20,993 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:21,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:48:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:21,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:48:21,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 25088 trivial. 0 not checked. [2023-11-26 10:48:21,850 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:21,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265606903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:21,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:21,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:48:21,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601784371] [2023-11-26 10:48:21,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:21,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:48:21,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:21,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:48:21,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:48:21,907 INFO L87 Difference]: Start difference. First operand has 345 states, 229 states have (on average 1.6331877729257642) internal successors, (374), 230 states have internal predecessors, (374), 113 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (113), 2 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 2 states have call successors, (113) [2023-11-26 10:48:22,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:22,004 INFO L93 Difference]: Finished difference Result 687 states and 1311 transitions. [2023-11-26 10:48:22,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:48:22,007 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (113), 2 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 2 states have call successors, (113) Word has length 729 [2023-11-26 10:48:22,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:22,029 INFO L225 Difference]: With dead ends: 687 [2023-11-26 10:48:22,030 INFO L226 Difference]: Without dead ends: 343 [2023-11-26 10:48:22,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 728 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 10:48:22,043 INFO L413 NwaCegarLoop]: 592 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, 592 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 10:48:22,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 592 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:22,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-11-26 10:48:22,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2023-11-26 10:48:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 228 states have (on average 1.618421052631579) internal successors, (369), 228 states have internal predecessors, (369), 113 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2023-11-26 10:48:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 595 transitions. [2023-11-26 10:48:22,158 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 595 transitions. Word has length 729 [2023-11-26 10:48:22,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:22,159 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 595 transitions. [2023-11-26 10:48:22,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (113), 2 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 2 states have call successors, (113) [2023-11-26 10:48:22,160 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 595 transitions. [2023-11-26 10:48:22,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-26 10:48:22,188 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:22,188 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:22,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:48:22,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 10:48:22,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:22,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:22,399 INFO L85 PathProgramCache]: Analyzing trace with hash 628332928, now seen corresponding path program 1 times [2023-11-26 10:48:22,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:22,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908109527] [2023-11-26 10:48:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:22,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:22,654 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:22,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169095298] [2023-11-26 10:48:22,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:22,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:22,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:22,657 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:22,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:48:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:23,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:48:23,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25312 trivial. 0 not checked. [2023-11-26 10:48:23,352 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:23,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:23,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908109527] [2023-11-26 10:48:23,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:23,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169095298] [2023-11-26 10:48:23,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169095298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:23,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:23,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:48:23,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334632154] [2023-11-26 10:48:23,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:23,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:48:23,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:23,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:48:23,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:48:23,363 INFO L87 Difference]: Start difference. First operand 343 states and 595 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-26 10:48:23,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:23,884 INFO L93 Difference]: Finished difference Result 1458 states and 2553 transitions. [2023-11-26 10:48:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:48:23,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) Word has length 729 [2023-11-26 10:48:23,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:23,899 INFO L225 Difference]: With dead ends: 1458 [2023-11-26 10:48:23,900 INFO L226 Difference]: Without dead ends: 1116 [2023-11-26 10:48:23,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 727 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 10:48:23,904 INFO L413 NwaCegarLoop]: 1251 mSDtfsCounter, 1254 mSDsluCounter, 1798 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 3049 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:23,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1254 Valid, 3049 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:48:23,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2023-11-26 10:48:24,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1108. [2023-11-26 10:48:24,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 801 states have (on average 1.6754057428214733) internal successors, (1342), 803 states have internal predecessors, (1342), 302 states have call successors, (302), 4 states have call predecessors, (302), 4 states have return successors, (302), 300 states have call predecessors, (302), 302 states have call successors, (302) [2023-11-26 10:48:24,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1946 transitions. [2023-11-26 10:48:24,130 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1946 transitions. Word has length 729 [2023-11-26 10:48:24,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:24,137 INFO L495 AbstractCegarLoop]: Abstraction has 1108 states and 1946 transitions. [2023-11-26 10:48:24,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-26 10:48:24,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1946 transitions. [2023-11-26 10:48:24,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-26 10:48:24,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:24,153 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:24,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:24,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:24,363 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:24,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:24,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1979718146, now seen corresponding path program 1 times [2023-11-26 10:48:24,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:24,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639992402] [2023-11-26 10:48:24,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:24,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:24,516 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:24,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472764127] [2023-11-26 10:48:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:24,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:24,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:24,519 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:24,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:48:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:25,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:48:25,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25312 trivial. 0 not checked. [2023-11-26 10:48:25,241 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:25,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:25,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639992402] [2023-11-26 10:48:25,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:25,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472764127] [2023-11-26 10:48:25,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472764127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:25,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:25,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:48:25,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171059177] [2023-11-26 10:48:25,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:25,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:48:25,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:25,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:48:25,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:48:25,250 INFO L87 Difference]: Start difference. First operand 1108 states and 1946 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-26 10:48:25,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:25,459 INFO L93 Difference]: Finished difference Result 3015 states and 5292 transitions. [2023-11-26 10:48:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:48:25,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) Word has length 729 [2023-11-26 10:48:25,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:25,483 INFO L225 Difference]: With dead ends: 3015 [2023-11-26 10:48:25,483 INFO L226 Difference]: Without dead ends: 1908 [2023-11-26 10:48:25,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:48:25,492 INFO L413 NwaCegarLoop]: 692 mSDtfsCounter, 353 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1945 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:25,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 1945 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:25,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2023-11-26 10:48:25,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1904. [2023-11-26 10:48:25,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1399 states have (on average 1.675482487491065) internal successors, (2344), 1405 states have internal predecessors, (2344), 496 states have call successors, (496), 8 states have call predecessors, (496), 8 states have return successors, (496), 490 states have call predecessors, (496), 496 states have call successors, (496) [2023-11-26 10:48:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 3336 transitions. [2023-11-26 10:48:25,725 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 3336 transitions. Word has length 729 [2023-11-26 10:48:25,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:25,727 INFO L495 AbstractCegarLoop]: Abstraction has 1904 states and 3336 transitions. [2023-11-26 10:48:25,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-26 10:48:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 3336 transitions. [2023-11-26 10:48:25,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-26 10:48:25,759 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:25,760 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:25,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:25,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:25,973 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:25,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:25,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1338607120, now seen corresponding path program 1 times [2023-11-26 10:48:25,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:25,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134424761] [2023-11-26 10:48:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:25,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:26,090 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:26,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744118740] [2023-11-26 10:48:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:26,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:26,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:26,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:26,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:48:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:26,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:48:26,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 11362 proven. 111 refuted. 0 times theorem prover too weak. 13839 trivial. 0 not checked. [2023-11-26 10:48:27,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 225 proven. 111 refuted. 0 times theorem prover too weak. 24976 trivial. 0 not checked. [2023-11-26 10:48:27,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:27,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134424761] [2023-11-26 10:48:27,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:27,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744118740] [2023-11-26 10:48:27,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744118740] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:27,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:27,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:48:27,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006467042] [2023-11-26 10:48:27,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:27,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:48:27,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:27,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:48:27,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:48:27,709 INFO L87 Difference]: Start difference. First operand 1904 states and 3336 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 2 states have call successors, (150), 2 states have call predecessors, (150), 4 states have return successors, (151), 2 states have call predecessors, (151), 2 states have call successors, (151) [2023-11-26 10:48:29,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:29,054 INFO L93 Difference]: Finished difference Result 3959 states and 6895 transitions. [2023-11-26 10:48:29,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:48:29,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 2 states have call successors, (150), 2 states have call predecessors, (150), 4 states have return successors, (151), 2 states have call predecessors, (151), 2 states have call successors, (151) Word has length 729 [2023-11-26 10:48:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:29,075 INFO L225 Difference]: With dead ends: 3959 [2023-11-26 10:48:29,075 INFO L226 Difference]: Without dead ends: 2056 [2023-11-26 10:48:29,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1460 GetRequests, 1450 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:48:29,088 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 892 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:29,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [967 Valid, 1363 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 10:48:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2023-11-26 10:48:29,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 2035. [2023-11-26 10:48:29,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 1452 states have (on average 1.6398071625344353) internal successors, (2381), 1459 states have internal predecessors, (2381), 571 states have call successors, (571), 11 states have call predecessors, (571), 11 states have return successors, (571), 564 states have call predecessors, (571), 571 states have call successors, (571) [2023-11-26 10:48:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 3523 transitions. [2023-11-26 10:48:29,404 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 3523 transitions. Word has length 729 [2023-11-26 10:48:29,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:29,407 INFO L495 AbstractCegarLoop]: Abstraction has 2035 states and 3523 transitions. [2023-11-26 10:48:29,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 2 states have call successors, (150), 2 states have call predecessors, (150), 4 states have return successors, (151), 2 states have call predecessors, (151), 2 states have call successors, (151) [2023-11-26 10:48:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 3523 transitions. [2023-11-26 10:48:29,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-26 10:48:29,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:29,418 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:29,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:29,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:29,628 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:29,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:29,628 INFO L85 PathProgramCache]: Analyzing trace with hash -584620914, now seen corresponding path program 1 times [2023-11-26 10:48:29,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:29,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142183289] [2023-11-26 10:48:29,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:29,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:29,754 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:29,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133982755] [2023-11-26 10:48:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:29,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:29,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:29,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:29,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:48:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:30,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:48:30,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 10677 proven. 63 refuted. 0 times theorem prover too weak. 14572 trivial. 0 not checked. [2023-11-26 10:48:31,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 273 proven. 63 refuted. 0 times theorem prover too weak. 24976 trivial. 0 not checked. [2023-11-26 10:48:31,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:31,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142183289] [2023-11-26 10:48:31,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:31,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133982755] [2023-11-26 10:48:31,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133982755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:31,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:31,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-26 10:48:31,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800589058] [2023-11-26 10:48:31,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:31,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:48:31,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:31,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:48:31,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:48:31,662 INFO L87 Difference]: Start difference. First operand 2035 states and 3523 transitions. Second operand has 12 states, 12 states have (on average 19.25) internal successors, (231), 12 states have internal predecessors, (231), 5 states have call successors, (143), 3 states have call predecessors, (143), 5 states have return successors, (143), 5 states have call predecessors, (143), 5 states have call successors, (143) [2023-11-26 10:48:33,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:33,252 INFO L93 Difference]: Finished difference Result 3974 states and 6874 transitions. [2023-11-26 10:48:33,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:48:33,253 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.25) internal successors, (231), 12 states have internal predecessors, (231), 5 states have call successors, (143), 3 states have call predecessors, (143), 5 states have return successors, (143), 5 states have call predecessors, (143), 5 states have call successors, (143) Word has length 729 [2023-11-26 10:48:33,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:33,273 INFO L225 Difference]: With dead ends: 3974 [2023-11-26 10:48:33,273 INFO L226 Difference]: Without dead ends: 2063 [2023-11-26 10:48:33,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1460 GetRequests, 1446 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:48:33,282 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 1037 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:33,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1128 Valid, 1810 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 10:48:33,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2023-11-26 10:48:33,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 2043. [2023-11-26 10:48:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 1458 states have (on average 1.631687242798354) internal successors, (2379), 1465 states have internal predecessors, (2379), 571 states have call successors, (571), 13 states have call predecessors, (571), 13 states have return successors, (571), 564 states have call predecessors, (571), 571 states have call successors, (571) [2023-11-26 10:48:33,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 3521 transitions. [2023-11-26 10:48:33,539 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 3521 transitions. Word has length 729 [2023-11-26 10:48:33,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:33,540 INFO L495 AbstractCegarLoop]: Abstraction has 2043 states and 3521 transitions. [2023-11-26 10:48:33,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.25) internal successors, (231), 12 states have internal predecessors, (231), 5 states have call successors, (143), 3 states have call predecessors, (143), 5 states have return successors, (143), 5 states have call predecessors, (143), 5 states have call successors, (143) [2023-11-26 10:48:33,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 3521 transitions. [2023-11-26 10:48:33,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-26 10:48:33,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:33,552 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:33,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:33,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:33,762 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:33,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:33,763 INFO L85 PathProgramCache]: Analyzing trace with hash -639013812, now seen corresponding path program 1 times [2023-11-26 10:48:33,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:33,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038994924] [2023-11-26 10:48:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:33,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:33,879 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:33,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212625119] [2023-11-26 10:48:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:33,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:33,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:33,881 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:33,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:48:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:34,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:48:34,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 8212 proven. 66 refuted. 0 times theorem prover too weak. 17034 trivial. 0 not checked. [2023-11-26 10:48:34,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 270 proven. 66 refuted. 0 times theorem prover too weak. 24976 trivial. 0 not checked. [2023-11-26 10:48:35,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:35,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038994924] [2023-11-26 10:48:35,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:35,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212625119] [2023-11-26 10:48:35,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212625119] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:35,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:35,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:48:35,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351929774] [2023-11-26 10:48:35,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:35,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:48:35,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:35,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:48:35,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:48:35,233 INFO L87 Difference]: Start difference. First operand 2043 states and 3521 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-26 10:48:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:36,221 INFO L93 Difference]: Finished difference Result 3994 states and 6874 transitions. [2023-11-26 10:48:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:48:36,223 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) Word has length 729 [2023-11-26 10:48:36,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:36,244 INFO L225 Difference]: With dead ends: 3994 [2023-11-26 10:48:36,244 INFO L226 Difference]: Without dead ends: 2075 [2023-11-26 10:48:36,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1460 GetRequests, 1450 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 10:48:36,254 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 712 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:36,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 1178 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 10:48:36,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2023-11-26 10:48:36,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2051. [2023-11-26 10:48:36,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 1464 states have (on average 1.6236338797814207) internal successors, (2377), 1471 states have internal predecessors, (2377), 571 states have call successors, (571), 15 states have call predecessors, (571), 15 states have return successors, (571), 564 states have call predecessors, (571), 571 states have call successors, (571) [2023-11-26 10:48:36,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 3519 transitions. [2023-11-26 10:48:36,558 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 3519 transitions. Word has length 729 [2023-11-26 10:48:36,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:36,560 INFO L495 AbstractCegarLoop]: Abstraction has 2051 states and 3519 transitions. [2023-11-26 10:48:36,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-26 10:48:36,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 3519 transitions. [2023-11-26 10:48:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-26 10:48:36,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:36,571 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:36,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:36,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:48:36,782 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:36,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:36,783 INFO L85 PathProgramCache]: Analyzing trace with hash -205284726, now seen corresponding path program 1 times [2023-11-26 10:48:36,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:36,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102230560] [2023-11-26 10:48:36,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:36,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:36,879 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:36,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947159532] [2023-11-26 10:48:36,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:36,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:36,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:36,881 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:36,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:48:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:37,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:48:37,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25312 trivial. 0 not checked. [2023-11-26 10:48:37,682 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:37,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:37,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102230560] [2023-11-26 10:48:37,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:37,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947159532] [2023-11-26 10:48:37,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947159532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:37,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:37,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:48:37,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307326964] [2023-11-26 10:48:37,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:37,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:48:37,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:37,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:48:37,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:48:37,689 INFO L87 Difference]: Start difference. First operand 2051 states and 3519 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-26 10:48:37,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:37,981 INFO L93 Difference]: Finished difference Result 5505 states and 9514 transitions. [2023-11-26 10:48:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:48:37,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) Word has length 729 [2023-11-26 10:48:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:38,010 INFO L225 Difference]: With dead ends: 5505 [2023-11-26 10:48:38,011 INFO L226 Difference]: Without dead ends: 3538 [2023-11-26 10:48:38,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 726 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 10:48:38,020 INFO L413 NwaCegarLoop]: 739 mSDtfsCounter, 355 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 2057 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:38,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 2057 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:48:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2023-11-26 10:48:38,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 3528. [2023-11-26 10:48:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 2676 states have (on average 1.6629297458893872) internal successors, (4450), 2691 states have internal predecessors, (4450), 827 states have call successors, (827), 24 states have call predecessors, (827), 24 states have return successors, (827), 812 states have call predecessors, (827), 827 states have call successors, (827) [2023-11-26 10:48:38,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 6104 transitions. [2023-11-26 10:48:38,459 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 6104 transitions. Word has length 729 [2023-11-26 10:48:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:38,460 INFO L495 AbstractCegarLoop]: Abstraction has 3528 states and 6104 transitions. [2023-11-26 10:48:38,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-26 10:48:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 6104 transitions. [2023-11-26 10:48:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2023-11-26 10:48:38,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:38,476 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:38,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:38,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:48:38,691 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:38,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:38,691 INFO L85 PathProgramCache]: Analyzing trace with hash 103191878, now seen corresponding path program 1 times [2023-11-26 10:48:38,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:38,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095333702] [2023-11-26 10:48:38,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:38,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:38,792 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:38,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286259308] [2023-11-26 10:48:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:38,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:38,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:38,794 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:38,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:48:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:39,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:48:39,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 11286 proven. 225 refuted. 0 times theorem prover too weak. 13801 trivial. 0 not checked. [2023-11-26 10:48:40,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 111 proven. 225 refuted. 0 times theorem prover too weak. 24976 trivial. 0 not checked. [2023-11-26 10:48:40,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:40,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095333702] [2023-11-26 10:48:40,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:40,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286259308] [2023-11-26 10:48:40,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286259308] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:40,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:40,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:48:40,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223498538] [2023-11-26 10:48:40,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:40,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:48:40,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:40,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:48:40,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:48:40,906 INFO L87 Difference]: Start difference. First operand 3528 states and 6104 transitions. Second operand has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 2 states have call successors, (188), 2 states have call predecessors, (188), 4 states have return successors, (189), 2 states have call predecessors, (189), 2 states have call successors, (189) [2023-11-26 10:48:41,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:41,884 INFO L93 Difference]: Finished difference Result 7024 states and 12094 transitions. [2023-11-26 10:48:41,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:48:41,886 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 2 states have call successors, (188), 2 states have call predecessors, (188), 4 states have return successors, (189), 2 states have call predecessors, (189), 2 states have call successors, (189) Word has length 730 [2023-11-26 10:48:41,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:41,918 INFO L225 Difference]: With dead ends: 7024 [2023-11-26 10:48:41,918 INFO L226 Difference]: Without dead ends: 3624 [2023-11-26 10:48:41,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1462 GetRequests, 1452 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 10:48:41,931 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 304 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:41,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 1156 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 10:48:41,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3624 states. [2023-11-26 10:48:42,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3624 to 3536. [2023-11-26 10:48:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3536 states, 2687 states have (on average 1.6423520655005583) internal successors, (4413), 2702 states have internal predecessors, (4413), 819 states have call successors, (819), 29 states have call predecessors, (819), 29 states have return successors, (819), 804 states have call predecessors, (819), 819 states have call successors, (819) [2023-11-26 10:48:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3536 states to 3536 states and 6051 transitions. [2023-11-26 10:48:42,322 INFO L78 Accepts]: Start accepts. Automaton has 3536 states and 6051 transitions. Word has length 730 [2023-11-26 10:48:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:42,324 INFO L495 AbstractCegarLoop]: Abstraction has 3536 states and 6051 transitions. [2023-11-26 10:48:42,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 2 states have call successors, (188), 2 states have call predecessors, (188), 4 states have return successors, (189), 2 states have call predecessors, (189), 2 states have call successors, (189) [2023-11-26 10:48:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 3536 states and 6051 transitions. [2023-11-26 10:48:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2023-11-26 10:48:42,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:42,337 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:42,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:42,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 10:48:42,547 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:42,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:42,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1559008716, now seen corresponding path program 1 times [2023-11-26 10:48:42,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:42,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137277009] [2023-11-26 10:48:42,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:42,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:42,631 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:42,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661849125] [2023-11-26 10:48:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:42,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:42,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:42,633 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:42,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:48:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:43,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:48:43,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 12066 proven. 207 refuted. 0 times theorem prover too weak. 13039 trivial. 0 not checked. [2023-11-26 10:48:44,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 129 proven. 207 refuted. 0 times theorem prover too weak. 24976 trivial. 0 not checked. [2023-11-26 10:48:45,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:45,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137277009] [2023-11-26 10:48:45,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:45,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661849125] [2023-11-26 10:48:45,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661849125] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:45,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:45,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:48:45,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681600005] [2023-11-26 10:48:45,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:45,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:48:45,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:45,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:48:45,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:48:45,037 INFO L87 Difference]: Start difference. First operand 3536 states and 6051 transitions. Second operand has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 2 states have call successors, (182), 2 states have call predecessors, (182), 4 states have return successors, (183), 2 states have call predecessors, (183), 2 states have call successors, (183) [2023-11-26 10:48:46,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:46,075 INFO L93 Difference]: Finished difference Result 7022 states and 11975 transitions. [2023-11-26 10:48:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:48:46,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 2 states have call successors, (182), 2 states have call predecessors, (182), 4 states have return successors, (183), 2 states have call predecessors, (183), 2 states have call successors, (183) Word has length 730 [2023-11-26 10:48:46,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:46,104 INFO L225 Difference]: With dead ends: 7022 [2023-11-26 10:48:46,104 INFO L226 Difference]: Without dead ends: 3618 [2023-11-26 10:48:46,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1462 GetRequests, 1452 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 10:48:46,117 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 529 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:46,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 1163 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 10:48:46,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2023-11-26 10:48:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 3556. [2023-11-26 10:48:46,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 2702 states have (on average 1.6328645447816432) internal successors, (4412), 2717 states have internal predecessors, (4412), 819 states have call successors, (819), 34 states have call predecessors, (819), 34 states have return successors, (819), 804 states have call predecessors, (819), 819 states have call successors, (819) [2023-11-26 10:48:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 6050 transitions. [2023-11-26 10:48:46,520 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 6050 transitions. Word has length 730 [2023-11-26 10:48:46,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:46,522 INFO L495 AbstractCegarLoop]: Abstraction has 3556 states and 6050 transitions. [2023-11-26 10:48:46,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 2 states have call successors, (182), 2 states have call predecessors, (182), 4 states have return successors, (183), 2 states have call predecessors, (183), 2 states have call successors, (183) [2023-11-26 10:48:46,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 6050 transitions. [2023-11-26 10:48:46,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2023-11-26 10:48:46,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:46,535 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:46,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:46,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:46,744 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:46,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:46,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1424995210, now seen corresponding path program 1 times [2023-11-26 10:48:46,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:46,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744362138] [2023-11-26 10:48:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:46,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:46,848 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:46,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750641438] [2023-11-26 10:48:46,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:46,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:46,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:46,850 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:46,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:48:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:47,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:48:47,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25312 trivial. 0 not checked. [2023-11-26 10:48:47,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:48:47,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:47,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744362138] [2023-11-26 10:48:47,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:47,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750641438] [2023-11-26 10:48:47,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750641438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:47,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:47,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:48:47,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632442551] [2023-11-26 10:48:47,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:47,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:48:47,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:47,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:48:47,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:48:47,480 INFO L87 Difference]: Start difference. First operand 3556 states and 6050 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-26 10:48:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:47,948 INFO L93 Difference]: Finished difference Result 7024 states and 11937 transitions. [2023-11-26 10:48:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:48:47,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) Word has length 730 [2023-11-26 10:48:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:47,990 INFO L225 Difference]: With dead ends: 7024 [2023-11-26 10:48:47,990 INFO L226 Difference]: Without dead ends: 3572 [2023-11-26 10:48:48,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 727 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 10:48:48,002 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 174 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:48,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1806 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:48:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2023-11-26 10:48:48,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 3572. [2023-11-26 10:48:48,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3572 states, 2714 states have (on average 1.6241709653647753) internal successors, (4408), 2729 states have internal predecessors, (4408), 819 states have call successors, (819), 38 states have call predecessors, (819), 38 states have return successors, (819), 804 states have call predecessors, (819), 819 states have call successors, (819) [2023-11-26 10:48:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 6046 transitions. [2023-11-26 10:48:48,443 INFO L78 Accepts]: Start accepts. Automaton has 3572 states and 6046 transitions. Word has length 730 [2023-11-26 10:48:48,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:48,444 INFO L495 AbstractCegarLoop]: Abstraction has 3572 states and 6046 transitions. [2023-11-26 10:48:48,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (113), 1 states have call predecessors, (113), 1 states have return successors, (113), 1 states have call predecessors, (113), 1 states have call successors, (113) [2023-11-26 10:48:48,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3572 states and 6046 transitions. [2023-11-26 10:48:48,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2023-11-26 10:48:48,456 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:48,457 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:48,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:48,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 10:48:48,667 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:48,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:48,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1487034824, now seen corresponding path program 1 times [2023-11-26 10:48:48,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:48,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711691639] [2023-11-26 10:48:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:48,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:48,754 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:48,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107127707] [2023-11-26 10:48:48,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:48,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:48,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:48,757 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:48,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:48:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:49,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:48:49,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 15996 proven. 306 refuted. 0 times theorem prover too weak. 9010 trivial. 0 not checked. [2023-11-26 10:48:51,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25312 backedges. 213 proven. 123 refuted. 0 times theorem prover too weak. 24976 trivial. 0 not checked. [2023-11-26 10:48:52,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:52,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711691639] [2023-11-26 10:48:52,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:48:52,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107127707] [2023-11-26 10:48:52,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107127707] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:52,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:48:52,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2023-11-26 10:48:52,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78733854] [2023-11-26 10:48:52,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:52,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:48:52,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:52,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:48:52,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:48:52,101 INFO L87 Difference]: Start difference. First operand 3572 states and 6046 transitions. Second operand has 15 states, 15 states have (on average 17.666666666666668) internal successors, (265), 15 states have internal predecessors, (265), 4 states have call successors, (175), 3 states have call predecessors, (175), 6 states have return successors, (176), 4 states have call predecessors, (176), 4 states have call successors, (176) [2023-11-26 10:48:57,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:57,775 INFO L93 Difference]: Finished difference Result 18270 states and 30382 transitions. [2023-11-26 10:48:57,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-26 10:48:57,775 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 17.666666666666668) internal successors, (265), 15 states have internal predecessors, (265), 4 states have call successors, (175), 3 states have call predecessors, (175), 6 states have return successors, (176), 4 states have call predecessors, (176), 4 states have call successors, (176) Word has length 730 [2023-11-26 10:48:57,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:57,829 INFO L225 Difference]: With dead ends: 18270 [2023-11-26 10:48:57,829 INFO L226 Difference]: Without dead ends: 14834 [2023-11-26 10:48:57,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1498 GetRequests, 1449 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=726, Invalid=1824, Unknown=0, NotChecked=0, Total=2550 [2023-11-26 10:48:57,842 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 3712 mSDsluCounter, 2302 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 1872 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3761 SdHoareTripleChecker+Valid, 2812 SdHoareTripleChecker+Invalid, 4049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1872 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:57,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3761 Valid, 2812 Invalid, 4049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1872 Valid, 2177 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-26 10:48:57,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14834 states. [2023-11-26 10:48:59,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14834 to 9608. [2023-11-26 10:48:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9608 states, 7499 states have (on average 1.6235498066408856) internal successors, (12175), 7546 states have internal predecessors, (12175), 1999 states have call successors, (1999), 109 states have call predecessors, (1999), 109 states have return successors, (1999), 1952 states have call predecessors, (1999), 1999 states have call successors, (1999) [2023-11-26 10:48:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9608 states to 9608 states and 16173 transitions. [2023-11-26 10:48:59,157 INFO L78 Accepts]: Start accepts. Automaton has 9608 states and 16173 transitions. Word has length 730 [2023-11-26 10:48:59,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:59,160 INFO L495 AbstractCegarLoop]: Abstraction has 9608 states and 16173 transitions. [2023-11-26 10:48:59,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.666666666666668) internal successors, (265), 15 states have internal predecessors, (265), 4 states have call successors, (175), 3 states have call predecessors, (175), 6 states have return successors, (176), 4 states have call predecessors, (176), 4 states have call successors, (176) [2023-11-26 10:48:59,161 INFO L276 IsEmpty]: Start isEmpty. Operand 9608 states and 16173 transitions. [2023-11-26 10:48:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2023-11-26 10:48:59,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:59,224 INFO L195 NwaCegarLoop]: trace histogram [113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:59,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:59,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:59,434 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:59,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:59,435 INFO L85 PathProgramCache]: Analyzing trace with hash -940620415, now seen corresponding path program 1 times [2023-11-26 10:48:59,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:59,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881042894] [2023-11-26 10:48:59,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:59,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:59,521 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:48:59,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101348619] [2023-11-26 10:48:59,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:59,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:59,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:59,523 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:59,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37126465-feb4-4b66-b45d-89e46aa08bc7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:49:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:00,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:49:00,172 INFO L285 TraceCheckSpWp]: Computing forward predicates...