./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-25.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-25.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 77ad24cb61a81820de21a387d3a45f445f59c8037143cf446293ba440ffb37aa --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:39:58,805 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:39:58,874 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 23:39:58,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:39:58,880 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:39:58,906 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:39:58,907 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:39:58,908 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:39:58,908 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:39:58,909 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:39:58,909 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:39:58,910 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:39:58,911 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:39:58,911 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:39:58,912 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:39:58,912 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:39:58,913 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 23:39:58,913 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:39:58,914 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:39:58,914 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:39:58,915 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:39:58,916 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 23:39:58,916 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:39:58,917 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 23:39:58,917 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:39:58,918 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 23:39:58,918 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:39:58,918 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:39:58,919 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:39:58,919 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:39:58,920 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:39:58,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:39:58,920 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:39:58,921 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:39:58,921 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 23:39:58,921 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:39:58,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:39:58,921 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:39:58,922 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:39:58,922 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 23:39:58,922 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:39:58,922 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:39:58,923 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_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77ad24cb61a81820de21a387d3a45f445f59c8037143cf446293ba440ffb37aa [2023-11-28 23:39:59,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:39:59,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:39:59,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:39:59,170 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:39:59,170 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:39:59,171 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-25.i [2023-11-28 23:40:01,914 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:40:02,168 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:40:02,168 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-25.i [2023-11-28 23:40:02,183 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/data/fb1c1097c/103df0234b8e453b8399e4f315f14f61/FLAGdc632ac56 [2023-11-28 23:40:02,198 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/data/fb1c1097c/103df0234b8e453b8399e4f315f14f61 [2023-11-28 23:40:02,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:40:02,202 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:40:02,203 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:40:02,203 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:40:02,208 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:40:02,209 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:40:02" (1/1) ... [2023-11-28 23:40:02,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bcf4fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:02, skipping insertion in model container [2023-11-28 23:40:02,210 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:40:02" (1/1) ... [2023-11-28 23:40:02,299 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:40:02,445 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_af405eba-5486-4847-923d-941f4872b640/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-25.i[916,929] [2023-11-28 23:40:02,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:40:02,674 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:40:02,686 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_af405eba-5486-4847-923d-941f4872b640/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-25.i[916,929] [2023-11-28 23:40:02,785 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:40:02,805 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:40:02,805 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:02 WrapperNode [2023-11-28 23:40:02,805 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:40:02,807 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:40:02,807 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:40:02,807 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:40:02,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:02" (1/1) ... [2023-11-28 23:40:02,842 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:02" (1/1) ... [2023-11-28 23:40:02,960 INFO L138 Inliner]: procedures = 26, calls = 81, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 713 [2023-11-28 23:40:02,960 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:40:02,961 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:40:02,961 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:40:02,961 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:40:02,969 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:02" (1/1) ... [2023-11-28 23:40:02,970 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:02" (1/1) ... [2023-11-28 23:40:02,987 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:02" (1/1) ... [2023-11-28 23:40:03,020 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]. [2023-11-28 23:40:03,021 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:02" (1/1) ... [2023-11-28 23:40:03,021 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:02" (1/1) ... [2023-11-28 23:40:03,042 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:02" (1/1) ... [2023-11-28 23:40:03,049 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:02" (1/1) ... [2023-11-28 23:40:03,058 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:02" (1/1) ... [2023-11-28 23:40:03,067 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:02" (1/1) ... [2023-11-28 23:40:03,076 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:40:03,077 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:40:03,077 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:40:03,077 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:40:03,078 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:02" (1/1) ... [2023-11-28 23:40:03,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:40:03,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:03,101 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:40:03,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:40:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:40:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-28 23:40:03,144 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-28 23:40:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:40:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:40:03,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:40:03,277 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:40:03,279 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:40:04,250 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:40:04,310 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:40:04,310 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-28 23:40:04,311 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:40:04 BoogieIcfgContainer [2023-11-28 23:40:04,311 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:40:04,314 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:40:04,314 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:40:04,316 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:40:04,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:40:02" (1/3) ... [2023-11-28 23:40:04,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8d1559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:40:04, skipping insertion in model container [2023-11-28 23:40:04,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:02" (2/3) ... [2023-11-28 23:40:04,318 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8d1559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:40:04, skipping insertion in model container [2023-11-28 23:40:04,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:40:04" (3/3) ... [2023-11-28 23:40:04,319 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-25.i [2023-11-28 23:40:04,334 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:40:04,334 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 23:40:04,383 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:40:04,388 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;@3a7d1e64, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:40:04,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 23:40:04,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 261 states, 190 states have (on average 1.5894736842105264) internal successors, (302), 191 states have internal predecessors, (302), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-28 23:40:04,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-11-28 23:40:04,423 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:04,424 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:04,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:04,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:04,430 INFO L85 PathProgramCache]: Analyzing trace with hash 369509684, now seen corresponding path program 1 times [2023-11-28 23:40:04,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:04,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333331235] [2023-11-28 23:40:04,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:04,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:04,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:04,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333331235] [2023-11-28 23:40:04,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-28 23:40:04,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828457823] [2023-11-28 23:40:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:04,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:04,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:04,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:04,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 23:40:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:05,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-28 23:40:05,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 8978 trivial. 0 not checked. [2023-11-28 23:40:05,281 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:05,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828457823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:05,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:05,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:40:05,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209458770] [2023-11-28 23:40:05,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:05,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 23:40:05,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:05,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 23:40:05,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 23:40:05,317 INFO L87 Difference]: Start difference. First operand has 261 states, 190 states have (on average 1.5894736842105264) internal successors, (302), 191 states have internal predecessors, (302), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) Second operand has 2 states, 2 states have (on average 66.5) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 2 states have call successors, (68) [2023-11-28 23:40:05,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:05,395 INFO L93 Difference]: Finished difference Result 519 states and 942 transitions. [2023-11-28 23:40:05,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 23:40:05,398 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 66.5) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 2 states have call successors, (68) Word has length 468 [2023-11-28 23:40:05,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:05,409 INFO L225 Difference]: With dead ends: 519 [2023-11-28 23:40:05,409 INFO L226 Difference]: Without dead ends: 259 [2023-11-28 23:40:05,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 23:40:05,419 INFO L413 NwaCegarLoop]: 430 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, 430 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 [2023-11-28 23:40:05,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 430 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:40:05,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-28 23:40:05,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2023-11-28 23:40:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 189 states have (on average 1.5714285714285714) internal successors, (297), 189 states have internal predecessors, (297), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-28 23:40:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 433 transitions. [2023-11-28 23:40:05,486 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 433 transitions. Word has length 468 [2023-11-28 23:40:05,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:05,487 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 433 transitions. [2023-11-28 23:40:05,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 66.5) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 2 states have call successors, (68) [2023-11-28 23:40:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 433 transitions. [2023-11-28 23:40:05,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-11-28 23:40:05,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:05,498 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:05,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 23:40:05,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-28 23:40:05,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:05,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:05,700 INFO L85 PathProgramCache]: Analyzing trace with hash -679095432, now seen corresponding path program 1 times [2023-11-28 23:40:05,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:05,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337333503] [2023-11-28 23:40:05,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:05,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:05,838 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:05,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732816796] [2023-11-28 23:40:05,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:05,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:05,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:05,840 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:05,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 23:40:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:06,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 23:40:06,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:06,341 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:06,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:06,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337333503] [2023-11-28 23:40:06,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:06,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732816796] [2023-11-28 23:40:06,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732816796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:06,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:06,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:40:06,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304302537] [2023-11-28 23:40:06,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:06,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:40:06,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:06,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:40:06,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:40:06,348 INFO L87 Difference]: Start difference. First operand 259 states and 433 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:06,434 INFO L93 Difference]: Finished difference Result 518 states and 867 transitions. [2023-11-28 23:40:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:40:06,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 468 [2023-11-28 23:40:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:06,441 INFO L225 Difference]: With dead ends: 518 [2023-11-28 23:40:06,441 INFO L226 Difference]: Without dead ends: 260 [2023-11-28 23:40:06,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:40:06,444 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 122 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:06,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 1156 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:40:06,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-28 23:40:06,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2023-11-28 23:40:06,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 190 states have (on average 1.568421052631579) internal successors, (298), 190 states have internal predecessors, (298), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-28 23:40:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2023-11-28 23:40:06,476 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 468 [2023-11-28 23:40:06,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:06,479 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2023-11-28 23:40:06,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:06,480 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2023-11-28 23:40:06,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-11-28 23:40:06,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:06,492 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:06,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 23:40:06,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:06,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:06,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:06,693 INFO L85 PathProgramCache]: Analyzing trace with hash -638420682, now seen corresponding path program 1 times [2023-11-28 23:40:06,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:06,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058003953] [2023-11-28 23:40:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:06,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:06,796 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:06,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401637612] [2023-11-28 23:40:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:06,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:06,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:06,798 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:06,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 23:40:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:07,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 23:40:07,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:07,278 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:07,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:07,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058003953] [2023-11-28 23:40:07,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:07,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401637612] [2023-11-28 23:40:07,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401637612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:07,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:07,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:40:07,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035364128] [2023-11-28 23:40:07,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:07,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:40:07,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:07,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:40:07,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:40:07,283 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:07,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:07,353 INFO L93 Difference]: Finished difference Result 649 states and 1088 transitions. [2023-11-28 23:40:07,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:40:07,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 468 [2023-11-28 23:40:07,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:07,360 INFO L225 Difference]: With dead ends: 649 [2023-11-28 23:40:07,360 INFO L226 Difference]: Without dead ends: 390 [2023-11-28 23:40:07,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:40:07,363 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 221 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:07,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 1016 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:40:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-11-28 23:40:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 362. [2023-11-28 23:40:07,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 292 states have (on average 1.63013698630137) internal successors, (476), 292 states have internal predecessors, (476), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-28 23:40:07,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 612 transitions. [2023-11-28 23:40:07,393 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 612 transitions. Word has length 468 [2023-11-28 23:40:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:07,395 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 612 transitions. [2023-11-28 23:40:07,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:07,395 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 612 transitions. [2023-11-28 23:40:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-11-28 23:40:07,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:07,400 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:07,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 23:40:07,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:07,601 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:07,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:07,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1397258806, now seen corresponding path program 1 times [2023-11-28 23:40:07,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:07,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819613322] [2023-11-28 23:40:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:07,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:07,719 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:07,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516181337] [2023-11-28 23:40:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:07,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:07,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:07,721 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:07,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 23:40:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:08,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 23:40:08,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:08,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:08,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:08,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819613322] [2023-11-28 23:40:08,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:08,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516181337] [2023-11-28 23:40:08,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516181337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:08,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:08,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:40:08,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254105662] [2023-11-28 23:40:08,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:08,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:40:08,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:08,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:40:08,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:40:08,240 INFO L87 Difference]: Start difference. First operand 362 states and 612 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:08,334 INFO L93 Difference]: Finished difference Result 1084 states and 1834 transitions. [2023-11-28 23:40:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:40:08,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 468 [2023-11-28 23:40:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:08,342 INFO L225 Difference]: With dead ends: 1084 [2023-11-28 23:40:08,342 INFO L226 Difference]: Without dead ends: 723 [2023-11-28 23:40:08,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:40:08,345 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 394 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:08,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 984 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:40:08,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2023-11-28 23:40:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 721. [2023-11-28 23:40:08,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 582 states have (on average 1.6185567010309279) internal successors, (942), 582 states have internal predecessors, (942), 136 states have call successors, (136), 2 states have call predecessors, (136), 2 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2023-11-28 23:40:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1214 transitions. [2023-11-28 23:40:08,407 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1214 transitions. Word has length 468 [2023-11-28 23:40:08,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:08,408 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 1214 transitions. [2023-11-28 23:40:08,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1214 transitions. [2023-11-28 23:40:08,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-11-28 23:40:08,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:08,414 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:08,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 23:40:08,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:08,618 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:08,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:08,618 INFO L85 PathProgramCache]: Analyzing trace with hash 207144754, now seen corresponding path program 1 times [2023-11-28 23:40:08,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:08,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818408186] [2023-11-28 23:40:08,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:08,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:08,715 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:08,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042343776] [2023-11-28 23:40:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:08,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:08,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:08,716 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:08,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 23:40:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:09,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 23:40:09,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:10,453 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:10,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:10,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818408186] [2023-11-28 23:40:10,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:10,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042343776] [2023-11-28 23:40:10,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042343776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:10,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:10,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:40:10,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305384317] [2023-11-28 23:40:10,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:10,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:40:10,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:10,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:40:10,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:40:10,457 INFO L87 Difference]: Start difference. First operand 721 states and 1214 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:10,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:10,621 INFO L93 Difference]: Finished difference Result 1989 states and 3340 transitions. [2023-11-28 23:40:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:40:10,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 468 [2023-11-28 23:40:10,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:10,630 INFO L225 Difference]: With dead ends: 1989 [2023-11-28 23:40:10,630 INFO L226 Difference]: Without dead ends: 1269 [2023-11-28 23:40:10,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:40:10,632 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 226 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:10,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1418 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:40:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2023-11-28 23:40:10,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1233. [2023-11-28 23:40:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 956 states have (on average 1.5815899581589958) internal successors, (1512), 956 states have internal predecessors, (1512), 272 states have call successors, (272), 4 states have call predecessors, (272), 4 states have return successors, (272), 272 states have call predecessors, (272), 272 states have call successors, (272) [2023-11-28 23:40:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2056 transitions. [2023-11-28 23:40:10,719 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2056 transitions. Word has length 468 [2023-11-28 23:40:10,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:10,720 INFO L495 AbstractCegarLoop]: Abstraction has 1233 states and 2056 transitions. [2023-11-28 23:40:10,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:10,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2056 transitions. [2023-11-28 23:40:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-28 23:40:10,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:10,724 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:10,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-28 23:40:10,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:10,925 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:10,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:10,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1824996646, now seen corresponding path program 1 times [2023-11-28 23:40:10,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:10,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624253686] [2023-11-28 23:40:10,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:10,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:10,991 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:10,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955753680] [2023-11-28 23:40:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:10,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:10,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:10,993 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:10,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 23:40:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:11,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 23:40:11,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:11,917 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:11,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:11,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624253686] [2023-11-28 23:40:11,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:11,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955753680] [2023-11-28 23:40:11,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955753680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:11,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:11,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:40:11,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196006973] [2023-11-28 23:40:11,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:11,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:40:11,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:11,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:40:11,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:40:11,921 INFO L87 Difference]: Start difference. First operand 1233 states and 2056 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:12,292 INFO L93 Difference]: Finished difference Result 3079 states and 5126 transitions. [2023-11-28 23:40:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:40:12,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 470 [2023-11-28 23:40:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:12,307 INFO L225 Difference]: With dead ends: 3079 [2023-11-28 23:40:12,308 INFO L226 Difference]: Without dead ends: 1847 [2023-11-28 23:40:12,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:40:12,313 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 415 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:12,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 1244 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:40:12,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2023-11-28 23:40:12,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1729. [2023-11-28 23:40:12,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1383 states have (on average 1.596529284164859) internal successors, (2208), 1383 states have internal predecessors, (2208), 340 states have call successors, (340), 5 states have call predecessors, (340), 5 states have return successors, (340), 340 states have call predecessors, (340), 340 states have call successors, (340) [2023-11-28 23:40:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2888 transitions. [2023-11-28 23:40:12,560 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2888 transitions. Word has length 470 [2023-11-28 23:40:12,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:12,561 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2888 transitions. [2023-11-28 23:40:12,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:12,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2888 transitions. [2023-11-28 23:40:12,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-28 23:40:12,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:12,566 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:12,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 23:40:12,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-28 23:40:12,770 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:12,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:12,771 INFO L85 PathProgramCache]: Analyzing trace with hash 378578346, now seen corresponding path program 1 times [2023-11-28 23:40:12,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:12,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184096928] [2023-11-28 23:40:12,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:12,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:12,844 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:12,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399432002] [2023-11-28 23:40:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:12,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:12,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:12,846 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:12,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 23:40:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:13,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 23:40:13,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:13,711 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:13,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:13,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184096928] [2023-11-28 23:40:13,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:13,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399432002] [2023-11-28 23:40:13,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399432002] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:13,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:13,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:40:13,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593793655] [2023-11-28 23:40:13,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:13,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:40:13,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:13,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:40:13,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:40:13,715 INFO L87 Difference]: Start difference. First operand 1729 states and 2888 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:14,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:14,128 INFO L93 Difference]: Finished difference Result 2741 states and 4578 transitions. [2023-11-28 23:40:14,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:40:14,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 471 [2023-11-28 23:40:14,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:14,142 INFO L225 Difference]: With dead ends: 2741 [2023-11-28 23:40:14,142 INFO L226 Difference]: Without dead ends: 1849 [2023-11-28 23:40:14,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:40:14,146 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 416 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:14,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 1654 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:40:14,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2023-11-28 23:40:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1731. [2023-11-28 23:40:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1385 states have (on average 1.595667870036101) internal successors, (2210), 1385 states have internal predecessors, (2210), 340 states have call successors, (340), 5 states have call predecessors, (340), 5 states have return successors, (340), 340 states have call predecessors, (340), 340 states have call successors, (340) [2023-11-28 23:40:14,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2890 transitions. [2023-11-28 23:40:14,329 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2890 transitions. Word has length 471 [2023-11-28 23:40:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:14,330 INFO L495 AbstractCegarLoop]: Abstraction has 1731 states and 2890 transitions. [2023-11-28 23:40:14,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2890 transitions. [2023-11-28 23:40:14,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-28 23:40:14,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:14,335 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:14,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 23:40:14,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-28 23:40:14,536 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:14,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:14,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2007931160, now seen corresponding path program 1 times [2023-11-28 23:40:14,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:14,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892922708] [2023-11-28 23:40:14,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:14,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:14,608 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:14,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444918738] [2023-11-28 23:40:14,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:14,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:14,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:14,610 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:14,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 23:40:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:15,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 23:40:15,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:15,987 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:15,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:15,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892922708] [2023-11-28 23:40:15,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:15,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444918738] [2023-11-28 23:40:15,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444918738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:15,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:15,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:40:15,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486744452] [2023-11-28 23:40:15,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:15,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:40:15,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:15,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:40:15,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:40:15,989 INFO L87 Difference]: Start difference. First operand 1731 states and 2890 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:16,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:16,322 INFO L93 Difference]: Finished difference Result 3399 states and 5671 transitions. [2023-11-28 23:40:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:40:16,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 471 [2023-11-28 23:40:16,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:16,336 INFO L225 Difference]: With dead ends: 3399 [2023-11-28 23:40:16,336 INFO L226 Difference]: Without dead ends: 1790 [2023-11-28 23:40:16,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:40:16,341 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 307 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:16,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 1221 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:40:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2023-11-28 23:40:16,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1730. [2023-11-28 23:40:16,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1384 states have (on average 1.5953757225433527) internal successors, (2208), 1384 states have internal predecessors, (2208), 340 states have call successors, (340), 5 states have call predecessors, (340), 5 states have return successors, (340), 340 states have call predecessors, (340), 340 states have call successors, (340) [2023-11-28 23:40:16,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 2888 transitions. [2023-11-28 23:40:16,540 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 2888 transitions. Word has length 471 [2023-11-28 23:40:16,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:16,541 INFO L495 AbstractCegarLoop]: Abstraction has 1730 states and 2888 transitions. [2023-11-28 23:40:16,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:16,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 2888 transitions. [2023-11-28 23:40:16,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-28 23:40:16,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:16,549 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:16,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 23:40:16,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-28 23:40:16,749 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:16,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2018523672, now seen corresponding path program 1 times [2023-11-28 23:40:16,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:16,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869854930] [2023-11-28 23:40:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:16,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:16,816 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:16,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21463745] [2023-11-28 23:40:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:16,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:16,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:16,818 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:16,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 23:40:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:17,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 23:40:17,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:17,264 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:17,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:17,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869854930] [2023-11-28 23:40:17,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:17,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21463745] [2023-11-28 23:40:17,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21463745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:17,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:17,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:40:17,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121639412] [2023-11-28 23:40:17,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:17,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:40:17,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:17,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:40:17,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:40:17,267 INFO L87 Difference]: Start difference. First operand 1730 states and 2888 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:17,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:17,551 INFO L93 Difference]: Finished difference Result 4650 states and 7777 transitions. [2023-11-28 23:40:17,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:40:17,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 471 [2023-11-28 23:40:17,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:17,567 INFO L225 Difference]: With dead ends: 4650 [2023-11-28 23:40:17,567 INFO L226 Difference]: Without dead ends: 3056 [2023-11-28 23:40:17,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:40:17,572 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 1103 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:17,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1103 Valid, 1624 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 23:40:17,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2023-11-28 23:40:17,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 3042. [2023-11-28 23:40:17,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3042 states, 2563 states have (on average 1.6156847444401092) internal successors, (4141), 2567 states have internal predecessors, (4141), 468 states have call successors, (468), 10 states have call predecessors, (468), 10 states have return successors, (468), 464 states have call predecessors, (468), 468 states have call successors, (468) [2023-11-28 23:40:17,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3042 states to 3042 states and 5077 transitions. [2023-11-28 23:40:17,820 INFO L78 Accepts]: Start accepts. Automaton has 3042 states and 5077 transitions. Word has length 471 [2023-11-28 23:40:17,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:17,821 INFO L495 AbstractCegarLoop]: Abstraction has 3042 states and 5077 transitions. [2023-11-28 23:40:17,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3042 states and 5077 transitions. [2023-11-28 23:40:17,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-28 23:40:17,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:17,827 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:17,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 23:40:18,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-28 23:40:18,034 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:18,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:18,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1690167402, now seen corresponding path program 1 times [2023-11-28 23:40:18,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:18,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765314823] [2023-11-28 23:40:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:18,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:18,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:18,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838147908] [2023-11-28 23:40:18,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:18,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:18,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:18,101 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:18,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 23:40:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:18,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 1212 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 23:40:18,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:18,995 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:18,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:18,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765314823] [2023-11-28 23:40:18,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:18,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838147908] [2023-11-28 23:40:18,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838147908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:18,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:18,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:40:18,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506400484] [2023-11-28 23:40:18,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:18,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:40:18,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:18,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:40:18,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:40:18,998 INFO L87 Difference]: Start difference. First operand 3042 states and 5077 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:19,635 INFO L93 Difference]: Finished difference Result 9031 states and 15042 transitions. [2023-11-28 23:40:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:40:19,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 471 [2023-11-28 23:40:19,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:19,670 INFO L225 Difference]: With dead ends: 9031 [2023-11-28 23:40:19,703 INFO L226 Difference]: Without dead ends: 6587 [2023-11-28 23:40:19,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-28 23:40:19,708 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 831 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1789 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:19,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 1789 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 23:40:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6587 states. [2023-11-28 23:40:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6587 to 6513. [2023-11-28 23:40:20,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6513 states, 5346 states have (on average 1.5963337074448185) internal successors, (8534), 5358 states have internal predecessors, (8534), 1140 states have call successors, (1140), 26 states have call predecessors, (1140), 26 states have return successors, (1140), 1128 states have call predecessors, (1140), 1140 states have call successors, (1140) [2023-11-28 23:40:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6513 states to 6513 states and 10814 transitions. [2023-11-28 23:40:20,126 INFO L78 Accepts]: Start accepts. Automaton has 6513 states and 10814 transitions. Word has length 471 [2023-11-28 23:40:20,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:20,127 INFO L495 AbstractCegarLoop]: Abstraction has 6513 states and 10814 transitions. [2023-11-28 23:40:20,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:20,127 INFO L276 IsEmpty]: Start isEmpty. Operand 6513 states and 10814 transitions. [2023-11-28 23:40:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2023-11-28 23:40:20,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:20,134 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:20,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-28 23:40:20,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 23:40:20,335 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:20,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:20,335 INFO L85 PathProgramCache]: Analyzing trace with hash 92615035, now seen corresponding path program 1 times [2023-11-28 23:40:20,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:20,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778760659] [2023-11-28 23:40:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:20,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:20,401 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:20,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265419941] [2023-11-28 23:40:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:20,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:20,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:20,402 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:20,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 23:40:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:20,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 23:40:20,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 3063 proven. 159 refuted. 0 times theorem prover too weak. 5890 trivial. 0 not checked. [2023-11-28 23:40:21,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:40:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 42 proven. 159 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-28 23:40:22,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:22,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778760659] [2023-11-28 23:40:22,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:22,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265419941] [2023-11-28 23:40:22,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265419941] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:40:22,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:40:22,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-28 23:40:22,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965161223] [2023-11-28 23:40:22,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:40:22,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 23:40:22,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:22,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 23:40:22,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-28 23:40:22,247 INFO L87 Difference]: Start difference. First operand 6513 states and 10814 transitions. Second operand has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 14 states have internal predecessors, (191), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-28 23:40:24,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:24,218 INFO L93 Difference]: Finished difference Result 24443 states and 40783 transitions. [2023-11-28 23:40:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 23:40:24,219 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 14 states have internal predecessors, (191), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) Word has length 472 [2023-11-28 23:40:24,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:24,275 INFO L225 Difference]: With dead ends: 24443 [2023-11-28 23:40:24,275 INFO L226 Difference]: Without dead ends: 18051 [2023-11-28 23:40:24,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 932 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2023-11-28 23:40:24,292 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 2928 mSDsluCounter, 2767 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2995 SdHoareTripleChecker+Valid, 3090 SdHoareTripleChecker+Invalid, 1956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:24,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2995 Valid, 3090 Invalid, 1956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-28 23:40:24,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18051 states. [2023-11-28 23:40:25,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18051 to 12523. [2023-11-28 23:40:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12523 states, 10239 states have (on average 1.5950776443012014) internal successors, (16332), 10263 states have internal predecessors, (16332), 2212 states have call successors, (2212), 71 states have call predecessors, (2212), 71 states have return successors, (2212), 2188 states have call predecessors, (2212), 2212 states have call successors, (2212) [2023-11-28 23:40:25,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12523 states to 12523 states and 20756 transitions. [2023-11-28 23:40:25,587 INFO L78 Accepts]: Start accepts. Automaton has 12523 states and 20756 transitions. Word has length 472 [2023-11-28 23:40:25,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:25,587 INFO L495 AbstractCegarLoop]: Abstraction has 12523 states and 20756 transitions. [2023-11-28 23:40:25,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 14 states have internal predecessors, (191), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-28 23:40:25,588 INFO L276 IsEmpty]: Start isEmpty. Operand 12523 states and 20756 transitions. [2023-11-28 23:40:25,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-28 23:40:25,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:25,597 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:25,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-28 23:40:25,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:25,798 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:25,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:25,798 INFO L85 PathProgramCache]: Analyzing trace with hash -401287615, now seen corresponding path program 1 times [2023-11-28 23:40:25,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:25,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380821735] [2023-11-28 23:40:25,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:25,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:25,860 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:25,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098086907] [2023-11-28 23:40:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:25,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:25,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:25,862 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:25,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 23:40:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:26,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 23:40:26,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:27,214 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:27,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:27,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380821735] [2023-11-28 23:40:27,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:27,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098086907] [2023-11-28 23:40:27,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098086907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:27,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:27,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:40:27,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253654276] [2023-11-28 23:40:27,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:27,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:40:27,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:27,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:40:27,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:40:27,217 INFO L87 Difference]: Start difference. First operand 12523 states and 20756 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:27,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:27,951 INFO L93 Difference]: Finished difference Result 27270 states and 45127 transitions. [2023-11-28 23:40:27,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:40:27,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 473 [2023-11-28 23:40:27,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:27,980 INFO L225 Difference]: With dead ends: 27270 [2023-11-28 23:40:27,980 INFO L226 Difference]: Without dead ends: 14872 [2023-11-28 23:40:28,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:40:28,001 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 501 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:28,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 1417 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:40:28,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14872 states. [2023-11-28 23:40:28,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14872 to 13692. [2023-11-28 23:40:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13692 states, 11202 states have (on average 1.5913229780396358) internal successors, (17826), 11228 states have internal predecessors, (17826), 2412 states have call successors, (2412), 77 states have call predecessors, (2412), 77 states have return successors, (2412), 2386 states have call predecessors, (2412), 2412 states have call successors, (2412) [2023-11-28 23:40:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13692 states to 13692 states and 22650 transitions. [2023-11-28 23:40:28,966 INFO L78 Accepts]: Start accepts. Automaton has 13692 states and 22650 transitions. Word has length 473 [2023-11-28 23:40:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:28,967 INFO L495 AbstractCegarLoop]: Abstraction has 13692 states and 22650 transitions. [2023-11-28 23:40:28,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 13692 states and 22650 transitions. [2023-11-28 23:40:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-28 23:40:28,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:28,977 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:28,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-28 23:40:29,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-28 23:40:29,178 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:29,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:29,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1172021181, now seen corresponding path program 1 times [2023-11-28 23:40:29,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:29,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157072341] [2023-11-28 23:40:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:29,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:29,245 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:29,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28913470] [2023-11-28 23:40:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:29,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:29,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:29,247 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:29,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 23:40:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:29,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 23:40:29,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 2731 proven. 165 refuted. 0 times theorem prover too weak. 6216 trivial. 0 not checked. [2023-11-28 23:40:30,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:40:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:30,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:30,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157072341] [2023-11-28 23:40:30,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:30,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28913470] [2023-11-28 23:40:30,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28913470] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 23:40:30,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 23:40:30,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2023-11-28 23:40:30,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871512022] [2023-11-28 23:40:30,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:30,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:40:30,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:30,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:40:30,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-28 23:40:30,752 INFO L87 Difference]: Start difference. First operand 13692 states and 22650 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:32,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-28 23:40:33,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:33,166 INFO L93 Difference]: Finished difference Result 32092 states and 53421 transitions. [2023-11-28 23:40:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:40:33,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 473 [2023-11-28 23:40:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:33,213 INFO L225 Difference]: With dead ends: 32092 [2023-11-28 23:40:33,213 INFO L226 Difference]: Without dead ends: 18958 [2023-11-28 23:40:33,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 946 GetRequests, 935 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-28 23:40:33,242 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 302 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:33,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1590 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 1 Unknown, 0 Unchecked, 1.8s Time] [2023-11-28 23:40:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18958 states. [2023-11-28 23:40:34,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18958 to 14028. [2023-11-28 23:40:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14028 states, 11493 states have (on average 1.576350822239624) internal successors, (18117), 11519 states have internal predecessors, (18117), 2412 states have call successors, (2412), 122 states have call predecessors, (2412), 122 states have return successors, (2412), 2386 states have call predecessors, (2412), 2412 states have call successors, (2412) [2023-11-28 23:40:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14028 states to 14028 states and 22941 transitions. [2023-11-28 23:40:34,433 INFO L78 Accepts]: Start accepts. Automaton has 14028 states and 22941 transitions. Word has length 473 [2023-11-28 23:40:34,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:34,434 INFO L495 AbstractCegarLoop]: Abstraction has 14028 states and 22941 transitions. [2023-11-28 23:40:34,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 14028 states and 22941 transitions. [2023-11-28 23:40:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-28 23:40:34,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:34,443 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:34,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-28 23:40:34,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:34,643 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:34,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:34,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1187539899, now seen corresponding path program 1 times [2023-11-28 23:40:34,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:34,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779879739] [2023-11-28 23:40:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:34,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:34,709 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:34,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786172854] [2023-11-28 23:40:34,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:34,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:34,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:34,711 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:34,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 23:40:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:35,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 23:40:35,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:36,466 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:36,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:36,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779879739] [2023-11-28 23:40:36,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:36,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786172854] [2023-11-28 23:40:36,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786172854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:36,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:36,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:40:36,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143448919] [2023-11-28 23:40:36,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:36,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:40:36,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:36,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:40:36,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:40:36,469 INFO L87 Difference]: Start difference. First operand 14028 states and 22941 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:37,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:37,320 INFO L93 Difference]: Finished difference Result 27842 states and 45391 transitions. [2023-11-28 23:40:37,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:40:37,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 473 [2023-11-28 23:40:37,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:37,350 INFO L225 Difference]: With dead ends: 27842 [2023-11-28 23:40:37,350 INFO L226 Difference]: Without dead ends: 14836 [2023-11-28 23:40:37,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:40:37,365 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 324 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:37,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1237 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:40:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14836 states. [2023-11-28 23:40:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14836 to 14050. [2023-11-28 23:40:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14050 states, 11515 states have (on average 1.5747286148501953) internal successors, (18133), 11541 states have internal predecessors, (18133), 2412 states have call successors, (2412), 122 states have call predecessors, (2412), 122 states have return successors, (2412), 2386 states have call predecessors, (2412), 2412 states have call successors, (2412) [2023-11-28 23:40:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 22957 transitions. [2023-11-28 23:40:38,199 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 22957 transitions. Word has length 473 [2023-11-28 23:40:38,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:38,200 INFO L495 AbstractCegarLoop]: Abstraction has 14050 states and 22957 transitions. [2023-11-28 23:40:38,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:38,200 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 22957 transitions. [2023-11-28 23:40:38,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-28 23:40:38,206 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:38,206 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:38,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-28 23:40:38,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 23:40:38,407 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:38,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:38,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1990083370, now seen corresponding path program 1 times [2023-11-28 23:40:38,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:38,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143686298] [2023-11-28 23:40:38,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:38,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:38,466 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:38,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146400481] [2023-11-28 23:40:38,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:38,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:38,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:38,467 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:38,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 23:40:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:38,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 1217 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 23:40:38,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:38,973 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:38,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:38,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143686298] [2023-11-28 23:40:38,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:38,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146400481] [2023-11-28 23:40:38,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146400481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:38,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:38,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:40:38,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377154378] [2023-11-28 23:40:38,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:38,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:40:38,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:38,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:40:38,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:40:38,977 INFO L87 Difference]: Start difference. First operand 14050 states and 22957 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:39,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:39,614 INFO L93 Difference]: Finished difference Result 21390 states and 35137 transitions. [2023-11-28 23:40:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:40:39,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 474 [2023-11-28 23:40:39,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:39,634 INFO L225 Difference]: With dead ends: 21390 [2023-11-28 23:40:39,634 INFO L226 Difference]: Without dead ends: 14092 [2023-11-28 23:40:39,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:40:39,644 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 0 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:39,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 849 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:40:39,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14092 states. [2023-11-28 23:40:40,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14092 to 14092. [2023-11-28 23:40:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14092 states, 11557 states have (on average 1.57263995846673) internal successors, (18175), 11583 states have internal predecessors, (18175), 2412 states have call successors, (2412), 122 states have call predecessors, (2412), 122 states have return successors, (2412), 2386 states have call predecessors, (2412), 2412 states have call successors, (2412) [2023-11-28 23:40:40,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14092 states to 14092 states and 22999 transitions. [2023-11-28 23:40:40,455 INFO L78 Accepts]: Start accepts. Automaton has 14092 states and 22999 transitions. Word has length 474 [2023-11-28 23:40:40,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:40,456 INFO L495 AbstractCegarLoop]: Abstraction has 14092 states and 22999 transitions. [2023-11-28 23:40:40,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:40,456 INFO L276 IsEmpty]: Start isEmpty. Operand 14092 states and 22999 transitions. [2023-11-28 23:40:40,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-28 23:40:40,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:40,463 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:40,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-28 23:40:40,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 23:40:40,664 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:40,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:40,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1337533272, now seen corresponding path program 1 times [2023-11-28 23:40:40,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:40,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342516883] [2023-11-28 23:40:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:40,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:40,725 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:40,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781350428] [2023-11-28 23:40:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:40,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:40,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:40,727 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:40,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 23:40:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:41,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:40:41,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:43,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:43,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:43,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342516883] [2023-11-28 23:40:43,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:43,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781350428] [2023-11-28 23:40:43,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781350428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:43,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:43,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:40:43,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196109129] [2023-11-28 23:40:43,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:43,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:40:43,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:43,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:40:43,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:40:43,093 INFO L87 Difference]: Start difference. First operand 14092 states and 22999 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:43,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:43,876 INFO L93 Difference]: Finished difference Result 27930 states and 45445 transitions. [2023-11-28 23:40:43,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:40:43,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 474 [2023-11-28 23:40:43,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:43,896 INFO L225 Difference]: With dead ends: 27930 [2023-11-28 23:40:43,896 INFO L226 Difference]: Without dead ends: 14872 [2023-11-28 23:40:43,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:40:43,912 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 320 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:43,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 1219 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:40:43,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14872 states. [2023-11-28 23:40:44,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14872 to 14114. [2023-11-28 23:40:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14114 states, 11579 states have (on average 1.571033768028327) internal successors, (18191), 11605 states have internal predecessors, (18191), 2412 states have call successors, (2412), 122 states have call predecessors, (2412), 122 states have return successors, (2412), 2386 states have call predecessors, (2412), 2412 states have call successors, (2412) [2023-11-28 23:40:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14114 states to 14114 states and 23015 transitions. [2023-11-28 23:40:44,743 INFO L78 Accepts]: Start accepts. Automaton has 14114 states and 23015 transitions. Word has length 474 [2023-11-28 23:40:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:44,744 INFO L495 AbstractCegarLoop]: Abstraction has 14114 states and 23015 transitions. [2023-11-28 23:40:44,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:44,744 INFO L276 IsEmpty]: Start isEmpty. Operand 14114 states and 23015 transitions. [2023-11-28 23:40:44,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-28 23:40:44,749 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:44,750 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:44,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-28 23:40:44,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 23:40:44,950 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:44,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:44,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1913182572, now seen corresponding path program 1 times [2023-11-28 23:40:44,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:44,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790386834] [2023-11-28 23:40:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:44,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:45,004 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:45,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368646209] [2023-11-28 23:40:45,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:45,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:45,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:45,006 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:45,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 23:40:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:45,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 23:40:45,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:45,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:45,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:45,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790386834] [2023-11-28 23:40:45,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:45,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368646209] [2023-11-28 23:40:45,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368646209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:45,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:45,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:40:45,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966922413] [2023-11-28 23:40:45,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:45,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:40:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:45,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:40:45,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:40:45,840 INFO L87 Difference]: Start difference. First operand 14114 states and 23015 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:47,045 INFO L93 Difference]: Finished difference Result 39986 states and 65149 transitions. [2023-11-28 23:40:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:40:47,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 474 [2023-11-28 23:40:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:47,085 INFO L225 Difference]: With dead ends: 39986 [2023-11-28 23:40:47,086 INFO L226 Difference]: Without dead ends: 27252 [2023-11-28 23:40:47,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:40:47,104 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 181 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:47,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 821 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:40:47,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27252 states. [2023-11-28 23:40:48,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27252 to 27186. [2023-11-28 23:40:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27186 states, 22189 states have (on average 1.5636126008382532) internal successors, (34695), 22241 states have internal predecessors, (34695), 4756 states have call successors, (4756), 240 states have call predecessors, (4756), 240 states have return successors, (4756), 4704 states have call predecessors, (4756), 4756 states have call successors, (4756) [2023-11-28 23:40:48,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27186 states to 27186 states and 44207 transitions. [2023-11-28 23:40:48,631 INFO L78 Accepts]: Start accepts. Automaton has 27186 states and 44207 transitions. Word has length 474 [2023-11-28 23:40:48,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:48,631 INFO L495 AbstractCegarLoop]: Abstraction has 27186 states and 44207 transitions. [2023-11-28 23:40:48,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:48,632 INFO L276 IsEmpty]: Start isEmpty. Operand 27186 states and 44207 transitions. [2023-11-28 23:40:48,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-28 23:40:48,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:48,639 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:48,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-28 23:40:48,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 23:40:48,840 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:48,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:48,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2053731182, now seen corresponding path program 1 times [2023-11-28 23:40:48,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:48,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12434120] [2023-11-28 23:40:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:48,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:48,895 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:48,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905634259] [2023-11-28 23:40:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:48,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:48,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:48,963 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:48,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-28 23:40:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:49,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 23:40:49,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:49,540 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:49,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:49,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12434120] [2023-11-28 23:40:49,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:49,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905634259] [2023-11-28 23:40:49,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905634259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:49,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:49,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:40:49,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163346992] [2023-11-28 23:40:49,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:49,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:40:49,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:49,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:40:49,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:40:49,543 INFO L87 Difference]: Start difference. First operand 27186 states and 44207 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:50,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:50,605 INFO L93 Difference]: Finished difference Result 53648 states and 87288 transitions. [2023-11-28 23:40:50,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:40:50,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 474 [2023-11-28 23:40:50,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:50,729 INFO L225 Difference]: With dead ends: 53648 [2023-11-28 23:40:50,729 INFO L226 Difference]: Without dead ends: 27186 [2023-11-28 23:40:50,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:40:50,748 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 421 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:50,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 939 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:40:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27186 states. [2023-11-28 23:40:52,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27186 to 27186. [2023-11-28 23:40:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27186 states, 22189 states have (on average 1.5565820902248861) internal successors, (34539), 22241 states have internal predecessors, (34539), 4756 states have call successors, (4756), 240 states have call predecessors, (4756), 240 states have return successors, (4756), 4704 states have call predecessors, (4756), 4756 states have call successors, (4756) [2023-11-28 23:40:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27186 states to 27186 states and 44051 transitions. [2023-11-28 23:40:52,506 INFO L78 Accepts]: Start accepts. Automaton has 27186 states and 44051 transitions. Word has length 474 [2023-11-28 23:40:52,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:52,506 INFO L495 AbstractCegarLoop]: Abstraction has 27186 states and 44051 transitions. [2023-11-28 23:40:52,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:52,507 INFO L276 IsEmpty]: Start isEmpty. Operand 27186 states and 44051 transitions. [2023-11-28 23:40:52,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-28 23:40:52,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:52,517 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:52,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-28 23:40:52,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 23:40:52,718 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:52,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:52,718 INFO L85 PathProgramCache]: Analyzing trace with hash 259223724, now seen corresponding path program 1 times [2023-11-28 23:40:52,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:52,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824301480] [2023-11-28 23:40:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:52,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:52,787 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:52,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425305555] [2023-11-28 23:40:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:52,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:52,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:52,789 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:52,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-28 23:40:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:53,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 23:40:53,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-28 23:40:54,408 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:40:54,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:54,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824301480] [2023-11-28 23:40:54,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:40:54,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425305555] [2023-11-28 23:40:54,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425305555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:54,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:54,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:40:54,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603369261] [2023-11-28 23:40:54,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:54,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 23:40:54,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:54,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 23:40:54,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 23:40:54,411 INFO L87 Difference]: Start difference. First operand 27186 states and 44051 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:57,091 INFO L93 Difference]: Finished difference Result 64956 states and 105162 transitions. [2023-11-28 23:40:57,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 23:40:57,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 475 [2023-11-28 23:40:57,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:57,150 INFO L225 Difference]: With dead ends: 64956 [2023-11-28 23:40:57,151 INFO L226 Difference]: Without dead ends: 40004 [2023-11-28 23:40:57,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-28 23:40:57,184 INFO L413 NwaCegarLoop]: 958 mSDtfsCounter, 1523 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 2379 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:57,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1523 Valid, 2379 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 23:40:57,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40004 states. [2023-11-28 23:40:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40004 to 30642. [2023-11-28 23:40:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30642 states, 25645 states have (on average 1.5615519594462859) internal successors, (40046), 25697 states have internal predecessors, (40046), 4756 states have call successors, (4756), 240 states have call predecessors, (4756), 240 states have return successors, (4756), 4704 states have call predecessors, (4756), 4756 states have call successors, (4756) [2023-11-28 23:40:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30642 states to 30642 states and 49558 transitions. [2023-11-28 23:40:59,420 INFO L78 Accepts]: Start accepts. Automaton has 30642 states and 49558 transitions. Word has length 475 [2023-11-28 23:40:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:59,421 INFO L495 AbstractCegarLoop]: Abstraction has 30642 states and 49558 transitions. [2023-11-28 23:40:59,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-28 23:40:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 30642 states and 49558 transitions. [2023-11-28 23:40:59,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-28 23:40:59,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:59,429 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:59,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-28 23:40:59,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:59,630 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:59,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:59,630 INFO L85 PathProgramCache]: Analyzing trace with hash -550268500, now seen corresponding path program 1 times [2023-11-28 23:40:59,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:59,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284787955] [2023-11-28 23:40:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:59,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:59,687 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:40:59,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127532152] [2023-11-28 23:40:59,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:59,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:59,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:59,689 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:59,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af405eba-5486-4847-923d-941f4872b640/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-28 23:41:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:00,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 1223 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-28 23:41:00,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:41:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 6645 proven. 519 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2023-11-28 23:41:26,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:42:11,737 WARN L293 SmtUtils]: Spent 8.68s on a formula simplification. DAG size of input: 54 DAG size of output: 36 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-11-28 23:43:15,104 WARN L293 SmtUtils]: Spent 18.78s on a formula simplification. DAG size of input: 186 DAG size of output: 122 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 23:44:05,933 WARN L293 SmtUtils]: Spent 15.72s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 23:45:05,089 WARN L293 SmtUtils]: Spent 8.51s on a formula simplification that was a NOOP. DAG size: 131 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 23:45:46,040 WARN L293 SmtUtils]: Spent 6.52s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 23:46:10,657 WARN L293 SmtUtils]: Spent 6.78s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 23:46:39,610 WARN L293 SmtUtils]: Spent 6.34s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 23:47:44,494 WARN L293 SmtUtils]: Spent 6.99s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 23:48:54,101 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 23:50:00,118 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 23:51:45,616 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 23:52:33,800 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 23:52:41,338 WARN L293 SmtUtils]: Spent 6.92s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)