./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-93.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_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/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_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-93.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/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_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/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 1b2580b05f716b3340a57c87bfc63ece4a11ad4db6012c36753c978126f42a07 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:15:09,120 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:15:09,191 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:15:09,195 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:15:09,196 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:15:09,223 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:15:09,224 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:15:09,225 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:15:09,225 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:15:09,226 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:15:09,227 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:15:09,227 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:15:09,228 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:15:09,228 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:15:09,229 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:15:09,229 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:15:09,230 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:15:09,230 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:15:09,231 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:15:09,231 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:15:09,232 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:15:09,232 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:15:09,233 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:15:09,233 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:15:09,234 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:15:09,234 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:15:09,234 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:15:09,235 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:15:09,235 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:15:09,236 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:15:09,236 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:15:09,236 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:15:09,237 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:15:09,237 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:15:09,237 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:15:09,237 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:15:09,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:15:09,238 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:15:09,238 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:15:09,238 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:15:09,238 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:15:09,239 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:15:09,239 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_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b2580b05f716b3340a57c87bfc63ece4a11ad4db6012c36753c978126f42a07 [2023-11-29 01:15:09,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:15:09,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:15:09,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:15:09,551 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:15:09,552 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:15:09,553 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-93.i [2023-11-29 01:15:12,449 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:15:12,742 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:15:12,742 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-93.i [2023-11-29 01:15:12,757 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/data/7ab431cf6/acb3a65deb0946878c8e62c863f8eaa6/FLAGaeb695264 [2023-11-29 01:15:12,771 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/data/7ab431cf6/acb3a65deb0946878c8e62c863f8eaa6 [2023-11-29 01:15:12,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:15:12,775 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:15:12,776 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:15:12,776 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:15:12,781 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:15:12,782 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:15:12" (1/1) ... [2023-11-29 01:15:12,783 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188e570d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:15:12, skipping insertion in model container [2023-11-29 01:15:12,783 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:15:12" (1/1) ... [2023-11-29 01:15:12,856 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:15:13,002 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_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-93.i[916,929] [2023-11-29 01:15:13,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:15:13,224 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:15:13,238 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_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-93.i[916,929] [2023-11-29 01:15:13,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:15:13,393 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:15:13,393 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:15:13 WrapperNode [2023-11-29 01:15:13,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:15:13,395 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:15:13,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:15:13,395 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:15:13,402 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:15:13" (1/1) ... [2023-11-29 01:15:13,431 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:15:13" (1/1) ... [2023-11-29 01:15:13,595 INFO L138 Inliner]: procedures = 26, calls = 92, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 830 [2023-11-29 01:15:13,595 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:15:13,596 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:15:13,596 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:15:13,596 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:15:13,608 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:15:13" (1/1) ... [2023-11-29 01:15:13,609 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:15:13" (1/1) ... [2023-11-29 01:15:13,629 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:15:13" (1/1) ... [2023-11-29 01:15:13,690 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]. [2023-11-29 01:15:13,690 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:15:13" (1/1) ... [2023-11-29 01:15:13,690 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:15:13" (1/1) ... [2023-11-29 01:15:13,719 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:15:13" (1/1) ... [2023-11-29 01:15:13,727 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:15:13" (1/1) ... [2023-11-29 01:15:13,738 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:15:13" (1/1) ... [2023-11-29 01:15:13,745 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:15:13" (1/1) ... [2023-11-29 01:15:13,759 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:15:13,760 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:15:13,760 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:15:13,760 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:15:13,761 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:15:13" (1/1) ... [2023-11-29 01:15:13,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:15:13,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:13,789 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:15:13,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:15:13,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:15:13,830 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 01:15:13,830 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 01:15:13,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:15:13,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:15:13,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:15:13,979 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:15:13,982 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:15:15,005 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:15:15,067 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:15:15,067 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 01:15:15,068 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:15:15 BoogieIcfgContainer [2023-11-29 01:15:15,068 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:15:15,071 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:15:15,071 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:15:15,074 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:15:15,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:15:12" (1/3) ... [2023-11-29 01:15:15,075 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c816f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:15:15, skipping insertion in model container [2023-11-29 01:15:15,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:15:13" (2/3) ... [2023-11-29 01:15:15,075 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c816f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:15:15, skipping insertion in model container [2023-11-29 01:15:15,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:15:15" (3/3) ... [2023-11-29 01:15:15,077 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-93.i [2023-11-29 01:15:15,090 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:15:15,090 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:15:15,136 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:15:15,141 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;@6a2f2374, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:15:15,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:15:15,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 305 states, 223 states have (on average 1.5695067264573992) internal successors, (350), 224 states have internal predecessors, (350), 79 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-29 01:15:15,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2023-11-29 01:15:15,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:15,181 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:15,182 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:15,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:15,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2109325268, now seen corresponding path program 1 times [2023-11-29 01:15:15,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:15,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307854756] [2023-11-29 01:15:15,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:15,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:15,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:15,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307854756] [2023-11-29 01:15:15,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 01:15:15,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269760609] [2023-11-29 01:15:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:15,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:15,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:15,610 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:15,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:15:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:16,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 1338 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 01:15:16,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 12168 trivial. 0 not checked. [2023-11-29 01:15:16,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:15:16,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269760609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:15:16,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:15:16,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:15:16,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300545341] [2023-11-29 01:15:16,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:15:16,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 01:15:16,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:16,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 01:15:16,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:15:16,256 INFO L87 Difference]: Start difference. First operand has 305 states, 223 states have (on average 1.5695067264573992) internal successors, (350), 224 states have internal predecessors, (350), 79 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) Second operand has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 2 states have call successors, (79), 2 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-29 01:15:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:16,328 INFO L93 Difference]: Finished difference Result 607 states and 1093 transitions. [2023-11-29 01:15:16,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 01:15:16,331 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 2 states have call successors, (79), 2 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 2 states have call successors, (79) Word has length 538 [2023-11-29 01:15:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:16,342 INFO L225 Difference]: With dead ends: 607 [2023-11-29 01:15:16,342 INFO L226 Difference]: Without dead ends: 303 [2023-11-29 01:15:16,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:15:16,352 INFO L413 NwaCegarLoop]: 494 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, 494 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 [2023-11-29 01:15:16,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 494 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:15:16,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-11-29 01:15:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2023-11-29 01:15:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 222 states have (on average 1.527027027027027) internal successors, (339), 222 states have internal predecessors, (339), 79 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-29 01:15:16,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 497 transitions. [2023-11-29 01:15:16,433 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 497 transitions. Word has length 538 [2023-11-29 01:15:16,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:16,434 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 497 transitions. [2023-11-29 01:15:16,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 2 states have call successors, (79), 2 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-29 01:15:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 497 transitions. [2023-11-29 01:15:16,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2023-11-29 01:15:16,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:16,452 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:16,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:15:16,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:16,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:16,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:16,655 INFO L85 PathProgramCache]: Analyzing trace with hash 419045886, now seen corresponding path program 1 times [2023-11-29 01:15:16,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:16,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318052842] [2023-11-29 01:15:16,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:16,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:16,804 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:15:16,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273586039] [2023-11-29 01:15:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:16,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:16,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:16,807 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:16,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:15:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:17,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:15:17,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 2272 proven. 0 refuted. 0 times theorem prover too weak. 10052 trivial. 0 not checked. [2023-11-29 01:15:17,550 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:15:17,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:17,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318052842] [2023-11-29 01:15:17,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:15:17,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273586039] [2023-11-29 01:15:17,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273586039] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:15:17,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:15:17,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:15:17,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339102855] [2023-11-29 01:15:17,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:15:17,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:15:17,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:17,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:15:17,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:15:17,556 INFO L87 Difference]: Start difference. First operand 303 states and 497 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-29 01:15:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:17,943 INFO L93 Difference]: Finished difference Result 605 states and 993 transitions. [2023-11-29 01:15:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:15:17,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) Word has length 539 [2023-11-29 01:15:17,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:17,951 INFO L225 Difference]: With dead ends: 605 [2023-11-29 01:15:17,951 INFO L226 Difference]: Without dead ends: 303 [2023-11-29 01:15:17,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 536 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:15:17,954 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 622 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:17,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 633 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:15:17,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-11-29 01:15:17,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2023-11-29 01:15:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 222 states have (on average 1.5225225225225225) internal successors, (338), 222 states have internal predecessors, (338), 79 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-29 01:15:17,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 496 transitions. [2023-11-29 01:15:17,999 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 496 transitions. Word has length 539 [2023-11-29 01:15:18,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:18,003 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 496 transitions. [2023-11-29 01:15:18,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-29 01:15:18,003 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 496 transitions. [2023-11-29 01:15:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2023-11-29 01:15:18,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:18,011 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:18,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:15:18,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:18,212 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:18,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:18,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2141816960, now seen corresponding path program 1 times [2023-11-29 01:15:18,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:18,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354747753] [2023-11-29 01:15:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:18,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:18,315 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:15:18,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589974861] [2023-11-29 01:15:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:18,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:18,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:18,318 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:18,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:15:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:18,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:15:18,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:15:18,847 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:15:18,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:18,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354747753] [2023-11-29 01:15:18,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:15:18,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589974861] [2023-11-29 01:15:18,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589974861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:15:18,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:15:18,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:15:18,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543042082] [2023-11-29 01:15:18,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:15:18,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:15:18,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:18,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:15:18,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:15:18,851 INFO L87 Difference]: Start difference. First operand 303 states and 496 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:18,959 INFO L93 Difference]: Finished difference Result 902 states and 1478 transitions. [2023-11-29 01:15:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:15:18,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 539 [2023-11-29 01:15:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:18,966 INFO L225 Difference]: With dead ends: 902 [2023-11-29 01:15:18,967 INFO L226 Difference]: Without dead ends: 600 [2023-11-29 01:15:18,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:15:18,969 INFO L413 NwaCegarLoop]: 700 mSDtfsCounter, 478 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:18,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 1173 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:15:18,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2023-11-29 01:15:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 431. [2023-11-29 01:15:19,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 350 states have (on average 1.582857142857143) internal successors, (554), 350 states have internal predecessors, (554), 79 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-29 01:15:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 712 transitions. [2023-11-29 01:15:19,028 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 712 transitions. Word has length 539 [2023-11-29 01:15:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:19,030 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 712 transitions. [2023-11-29 01:15:19,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 712 transitions. [2023-11-29 01:15:19,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2023-11-29 01:15:19,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:19,036 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:19,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:15:19,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:19,238 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:19,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:19,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1901577214, now seen corresponding path program 1 times [2023-11-29 01:15:19,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:19,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146922112] [2023-11-29 01:15:19,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:19,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:19,315 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:15:19,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267952454] [2023-11-29 01:15:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:19,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:19,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:19,316 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:19,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:15:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:19,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:15:19,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:15:19,847 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:15:19,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:19,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146922112] [2023-11-29 01:15:19,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:15:19,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267952454] [2023-11-29 01:15:19,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267952454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:15:19,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:15:19,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:15:19,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698185117] [2023-11-29 01:15:19,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:15:19,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:15:19,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:19,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:15:19,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:15:19,851 INFO L87 Difference]: Start difference. First operand 431 states and 712 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:20,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:20,127 INFO L93 Difference]: Finished difference Result 1433 states and 2347 transitions. [2023-11-29 01:15:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:15:20,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 539 [2023-11-29 01:15:20,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:20,135 INFO L225 Difference]: With dead ends: 1433 [2023-11-29 01:15:20,135 INFO L226 Difference]: Without dead ends: 1003 [2023-11-29 01:15:20,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:15:20,137 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 1079 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:20,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 1950 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:15:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2023-11-29 01:15:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 759. [2023-11-29 01:15:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 648 states have (on average 1.5925925925925926) internal successors, (1032), 649 states have internal predecessors, (1032), 108 states have call successors, (108), 2 states have call predecessors, (108), 2 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-29 01:15:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1248 transitions. [2023-11-29 01:15:20,204 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1248 transitions. Word has length 539 [2023-11-29 01:15:20,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:20,205 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 1248 transitions. [2023-11-29 01:15:20,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:20,206 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1248 transitions. [2023-11-29 01:15:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2023-11-29 01:15:20,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:20,211 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:20,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:15:20,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:20,412 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:20,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:20,413 INFO L85 PathProgramCache]: Analyzing trace with hash 514259136, now seen corresponding path program 1 times [2023-11-29 01:15:20,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:20,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991922110] [2023-11-29 01:15:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:20,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:20,503 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:15:20,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613418455] [2023-11-29 01:15:20,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:20,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:20,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:20,504 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:20,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:15:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:20,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:15:21,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:15:21,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:15:21,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:21,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991922110] [2023-11-29 01:15:21,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:15:21,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613418455] [2023-11-29 01:15:21,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613418455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:15:21,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:15:21,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:15:21,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030901651] [2023-11-29 01:15:21,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:15:21,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:15:21,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:21,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:15:21,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:15:21,056 INFO L87 Difference]: Start difference. First operand 759 states and 1248 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:21,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:21,222 INFO L93 Difference]: Finished difference Result 1412 states and 2312 transitions. [2023-11-29 01:15:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:15:21,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 539 [2023-11-29 01:15:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:21,230 INFO L225 Difference]: With dead ends: 1412 [2023-11-29 01:15:21,230 INFO L226 Difference]: Without dead ends: 654 [2023-11-29 01:15:21,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:15:21,233 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 347 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:21,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 985 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:15:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2023-11-29 01:15:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 555. [2023-11-29 01:15:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 473 states have (on average 1.5835095137420718) internal successors, (749), 473 states have internal predecessors, (749), 79 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-29 01:15:21,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 907 transitions. [2023-11-29 01:15:21,280 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 907 transitions. Word has length 539 [2023-11-29 01:15:21,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:21,282 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 907 transitions. [2023-11-29 01:15:21,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:21,282 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 907 transitions. [2023-11-29 01:15:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2023-11-29 01:15:21,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:21,288 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:21,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 01:15:21,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:21,489 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:21,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:21,489 INFO L85 PathProgramCache]: Analyzing trace with hash 541324738, now seen corresponding path program 1 times [2023-11-29 01:15:21,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:21,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133535300] [2023-11-29 01:15:21,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:21,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:21,574 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:15:21,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510335140] [2023-11-29 01:15:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:21,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:21,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:21,575 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:21,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:15:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:22,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 1343 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:15:22,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:15:22,212 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:15:22,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:22,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133535300] [2023-11-29 01:15:22,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:15:22,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510335140] [2023-11-29 01:15:22,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510335140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:15:22,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:15:22,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:15:22,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417805656] [2023-11-29 01:15:22,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:15:22,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:15:22,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:22,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:15:22,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:15:22,217 INFO L87 Difference]: Start difference. First operand 555 states and 907 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:23,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:23,140 INFO L93 Difference]: Finished difference Result 1672 states and 2710 transitions. [2023-11-29 01:15:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:15:23,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 539 [2023-11-29 01:15:23,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:23,149 INFO L225 Difference]: With dead ends: 1672 [2023-11-29 01:15:23,149 INFO L226 Difference]: Without dead ends: 1118 [2023-11-29 01:15:23,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:15:23,151 INFO L413 NwaCegarLoop]: 742 mSDtfsCounter, 998 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 2499 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:23,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [998 Valid, 2499 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 01:15:23,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2023-11-29 01:15:23,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 666. [2023-11-29 01:15:23,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 584 states have (on average 1.5736301369863013) internal successors, (919), 584 states have internal predecessors, (919), 79 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-29 01:15:23,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1077 transitions. [2023-11-29 01:15:23,199 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1077 transitions. Word has length 539 [2023-11-29 01:15:23,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:23,200 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 1077 transitions. [2023-11-29 01:15:23,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:23,200 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1077 transitions. [2023-11-29 01:15:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2023-11-29 01:15:23,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:23,204 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:23,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 01:15:23,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:23,405 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:23,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:23,405 INFO L85 PathProgramCache]: Analyzing trace with hash 789471232, now seen corresponding path program 1 times [2023-11-29 01:15:23,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:23,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732609954] [2023-11-29 01:15:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:23,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:23,489 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:15:23,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40816904] [2023-11-29 01:15:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:23,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:23,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:23,491 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:23,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:15:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:23,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 1343 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:15:23,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 6084 proven. 135 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2023-11-29 01:15:24,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:15:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 99 proven. 135 refuted. 0 times theorem prover too weak. 12090 trivial. 0 not checked. [2023-11-29 01:15:24,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:24,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732609954] [2023-11-29 01:15:24,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:15:24,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40816904] [2023-11-29 01:15:24,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40816904] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:15:24,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:15:24,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 01:15:24,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395692460] [2023-11-29 01:15:24,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:15:24,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:15:24,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:24,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:15:24,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:15:24,675 INFO L87 Difference]: Start difference. First operand 666 states and 1077 transitions. Second operand has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 3 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 3 states have call predecessors, (125), 3 states have call successors, (125) [2023-11-29 01:15:25,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:25,847 INFO L93 Difference]: Finished difference Result 2012 states and 3243 transitions. [2023-11-29 01:15:25,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:15:25,848 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 3 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 3 states have call predecessors, (125), 3 states have call successors, (125) Word has length 539 [2023-11-29 01:15:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:25,856 INFO L225 Difference]: With dead ends: 2012 [2023-11-29 01:15:25,856 INFO L226 Difference]: Without dead ends: 1347 [2023-11-29 01:15:25,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1087 GetRequests, 1069 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:15:25,859 INFO L413 NwaCegarLoop]: 760 mSDtfsCounter, 686 mSDsluCounter, 1968 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 2728 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:25,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 2728 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 01:15:25,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2023-11-29 01:15:25,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1114. [2023-11-29 01:15:25,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1031 states have (on average 1.594568380213385) internal successors, (1644), 1031 states have internal predecessors, (1644), 79 states have call successors, (79), 3 states have call predecessors, (79), 3 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-29 01:15:25,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1802 transitions. [2023-11-29 01:15:25,910 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1802 transitions. Word has length 539 [2023-11-29 01:15:25,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:25,911 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1802 transitions. [2023-11-29 01:15:25,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 3 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 3 states have call predecessors, (125), 3 states have call successors, (125) [2023-11-29 01:15:25,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1802 transitions. [2023-11-29 01:15:25,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2023-11-29 01:15:25,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:25,916 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:25,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:15:26,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:26,117 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:26,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:26,117 INFO L85 PathProgramCache]: Analyzing trace with hash -205222466, now seen corresponding path program 1 times [2023-11-29 01:15:26,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:26,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715311175] [2023-11-29 01:15:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:26,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:26,210 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:15:26,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070126704] [2023-11-29 01:15:26,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:26,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:26,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:26,212 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:26,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:15:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:26,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:15:26,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:15:26,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:15:26,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:26,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715311175] [2023-11-29 01:15:26,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:15:26,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070126704] [2023-11-29 01:15:26,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070126704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:15:26,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:15:26,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:15:26,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106730217] [2023-11-29 01:15:26,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:15:26,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:15:26,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:26,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:15:26,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:15:26,716 INFO L87 Difference]: Start difference. First operand 1114 states and 1802 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:26,873 INFO L93 Difference]: Finished difference Result 2845 states and 4604 transitions. [2023-11-29 01:15:26,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:15:26,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 539 [2023-11-29 01:15:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:26,883 INFO L225 Difference]: With dead ends: 2845 [2023-11-29 01:15:26,883 INFO L226 Difference]: Without dead ends: 1732 [2023-11-29 01:15:26,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:15:26,885 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 468 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:26,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 992 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:15:26,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2023-11-29 01:15:26,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1730. [2023-11-29 01:15:26,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1565 states have (on average 1.5667731629392971) internal successors, (2452), 1565 states have internal predecessors, (2452), 158 states have call successors, (158), 6 states have call predecessors, (158), 6 states have return successors, (158), 158 states have call predecessors, (158), 158 states have call successors, (158) [2023-11-29 01:15:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 2768 transitions. [2023-11-29 01:15:26,986 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 2768 transitions. Word has length 539 [2023-11-29 01:15:26,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:26,987 INFO L495 AbstractCegarLoop]: Abstraction has 1730 states and 2768 transitions. [2023-11-29 01:15:26,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:26,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 2768 transitions. [2023-11-29 01:15:26,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2023-11-29 01:15:26,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:26,993 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:27,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:15:27,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:27,195 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:27,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:27,195 INFO L85 PathProgramCache]: Analyzing trace with hash -299862596, now seen corresponding path program 1 times [2023-11-29 01:15:27,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:27,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671320588] [2023-11-29 01:15:27,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:27,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:27,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:15:27,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811075913] [2023-11-29 01:15:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:27,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:27,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:27,276 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:27,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:15:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:27,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:15:27,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:15:28,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:15:28,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:28,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671320588] [2023-11-29 01:15:28,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:15:28,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811075913] [2023-11-29 01:15:28,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811075913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:15:28,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:15:28,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:15:28,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006735251] [2023-11-29 01:15:28,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:15:28,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:15:28,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:28,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:15:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:15:28,324 INFO L87 Difference]: Start difference. First operand 1730 states and 2768 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:31,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:31,706 INFO L93 Difference]: Finished difference Result 11732 states and 18727 transitions. [2023-11-29 01:15:31,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:15:31,707 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 539 [2023-11-29 01:15:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:31,751 INFO L225 Difference]: With dead ends: 11732 [2023-11-29 01:15:31,752 INFO L226 Difference]: Without dead ends: 10003 [2023-11-29 01:15:31,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:15:31,756 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 2784 mSDsluCounter, 2783 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2784 SdHoareTripleChecker+Valid, 3552 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:31,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2784 Valid, 3552 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 1440 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 01:15:31,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10003 states. [2023-11-29 01:15:32,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10003 to 7411. [2023-11-29 01:15:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7411 states, 6690 states have (on average 1.5378176382660687) internal successors, (10288), 6694 states have internal predecessors, (10288), 690 states have call successors, (690), 30 states have call predecessors, (690), 30 states have return successors, (690), 686 states have call predecessors, (690), 690 states have call successors, (690) [2023-11-29 01:15:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7411 states to 7411 states and 11668 transitions. [2023-11-29 01:15:32,434 INFO L78 Accepts]: Start accepts. Automaton has 7411 states and 11668 transitions. Word has length 539 [2023-11-29 01:15:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:32,435 INFO L495 AbstractCegarLoop]: Abstraction has 7411 states and 11668 transitions. [2023-11-29 01:15:32,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:32,436 INFO L276 IsEmpty]: Start isEmpty. Operand 7411 states and 11668 transitions. [2023-11-29 01:15:32,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2023-11-29 01:15:32,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:32,451 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:32,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:15:32,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 01:15:32,652 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:32,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:32,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2021217346, now seen corresponding path program 1 times [2023-11-29 01:15:32,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:32,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920024468] [2023-11-29 01:15:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:32,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:32,735 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:15:32,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672795243] [2023-11-29 01:15:32,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:32,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:32,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:32,737 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:32,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:15:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:33,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 1340 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:15:33,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:15:33,412 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:15:33,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:33,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920024468] [2023-11-29 01:15:33,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:15:33,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672795243] [2023-11-29 01:15:33,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672795243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:15:33,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:15:33,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:15:33,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598297446] [2023-11-29 01:15:33,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:15:33,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:15:33,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:33,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:15:33,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:15:33,415 INFO L87 Difference]: Start difference. First operand 7411 states and 11668 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:34,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:34,801 INFO L93 Difference]: Finished difference Result 18068 states and 28388 transitions. [2023-11-29 01:15:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:15:34,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 539 [2023-11-29 01:15:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:34,871 INFO L225 Difference]: With dead ends: 18068 [2023-11-29 01:15:34,872 INFO L226 Difference]: Without dead ends: 10658 [2023-11-29 01:15:34,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:15:34,887 INFO L413 NwaCegarLoop]: 1141 mSDtfsCounter, 691 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 2336 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:34,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 2336 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:15:34,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10658 states. [2023-11-29 01:15:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10658 to 9955. [2023-11-29 01:15:35,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9955 states, 8928 states have (on average 1.5274417562724014) internal successors, (13637), 8937 states have internal predecessors, (13637), 981 states have call successors, (981), 45 states have call predecessors, (981), 45 states have return successors, (981), 972 states have call predecessors, (981), 981 states have call successors, (981) [2023-11-29 01:15:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9955 states to 9955 states and 15599 transitions. [2023-11-29 01:15:35,875 INFO L78 Accepts]: Start accepts. Automaton has 9955 states and 15599 transitions. Word has length 539 [2023-11-29 01:15:35,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:35,876 INFO L495 AbstractCegarLoop]: Abstraction has 9955 states and 15599 transitions. [2023-11-29 01:15:35,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:35,876 INFO L276 IsEmpty]: Start isEmpty. Operand 9955 states and 15599 transitions. [2023-11-29 01:15:35,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2023-11-29 01:15:35,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:35,886 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:35,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:15:36,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:15:36,086 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:36,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:36,087 INFO L85 PathProgramCache]: Analyzing trace with hash 164031289, now seen corresponding path program 1 times [2023-11-29 01:15:36,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:36,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178606302] [2023-11-29 01:15:36,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:36,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:36,158 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:15:36,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567572913] [2023-11-29 01:15:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:36,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:36,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:36,159 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:36,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:15:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:36,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:15:36,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 6072 proven. 0 refuted. 0 times theorem prover too weak. 6252 trivial. 0 not checked. [2023-11-29 01:15:36,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:15:36,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:36,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178606302] [2023-11-29 01:15:36,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:15:36,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567572913] [2023-11-29 01:15:36,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567572913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:15:36,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:15:36,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:15:36,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104057346] [2023-11-29 01:15:36,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:15:36,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:15:36,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:36,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:15:36,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:15:36,996 INFO L87 Difference]: Start difference. First operand 9955 states and 15599 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-29 01:15:37,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:37,863 INFO L93 Difference]: Finished difference Result 19909 states and 31197 transitions. [2023-11-29 01:15:37,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:15:37,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) Word has length 540 [2023-11-29 01:15:37,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:37,935 INFO L225 Difference]: With dead ends: 19909 [2023-11-29 01:15:37,935 INFO L226 Difference]: Without dead ends: 9955 [2023-11-29 01:15:37,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:15:37,951 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 611 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:37,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 464 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:15:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9955 states. [2023-11-29 01:15:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9955 to 9955. [2023-11-29 01:15:38,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9955 states, 8928 states have (on average 1.523521505376344) internal successors, (13602), 8937 states have internal predecessors, (13602), 981 states have call successors, (981), 45 states have call predecessors, (981), 45 states have return successors, (981), 972 states have call predecessors, (981), 981 states have call successors, (981) [2023-11-29 01:15:38,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9955 states to 9955 states and 15564 transitions. [2023-11-29 01:15:38,680 INFO L78 Accepts]: Start accepts. Automaton has 9955 states and 15564 transitions. Word has length 540 [2023-11-29 01:15:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:38,681 INFO L495 AbstractCegarLoop]: Abstraction has 9955 states and 15564 transitions. [2023-11-29 01:15:38,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-29 01:15:38,682 INFO L276 IsEmpty]: Start isEmpty. Operand 9955 states and 15564 transitions. [2023-11-29 01:15:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2023-11-29 01:15:38,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:38,701 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:38,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:15:38,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 01:15:38,902 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:38,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:38,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2072489079, now seen corresponding path program 1 times [2023-11-29 01:15:38,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:38,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306040106] [2023-11-29 01:15:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:38,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:38,989 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:15:38,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78765915] [2023-11-29 01:15:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:38,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:38,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:38,995 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:38,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:15:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:39,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:15:39,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:15:39,936 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:15:39,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:39,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306040106] [2023-11-29 01:15:39,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:15:39,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78765915] [2023-11-29 01:15:39,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78765915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:15:39,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:15:39,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:15:39,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081339426] [2023-11-29 01:15:39,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:15:39,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:15:39,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:39,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:15:39,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:15:39,939 INFO L87 Difference]: Start difference. First operand 9955 states and 15564 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:42,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:42,252 INFO L93 Difference]: Finished difference Result 26553 states and 41425 transitions. [2023-11-29 01:15:42,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:15:42,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 540 [2023-11-29 01:15:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:42,305 INFO L225 Difference]: With dead ends: 26553 [2023-11-29 01:15:42,306 INFO L226 Difference]: Without dead ends: 16518 [2023-11-29 01:15:42,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:15:42,318 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 2469 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2469 SdHoareTripleChecker+Valid, 2186 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:42,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2469 Valid, 2186 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 01:15:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16518 states. [2023-11-29 01:15:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16518 to 7071. [2023-11-29 01:15:42,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 6380 states have (on average 1.5192789968652038) internal successors, (9693), 6383 states have internal predecessors, (9693), 657 states have call successors, (657), 33 states have call predecessors, (657), 33 states have return successors, (657), 654 states have call predecessors, (657), 657 states have call successors, (657) [2023-11-29 01:15:42,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 11007 transitions. [2023-11-29 01:15:42,998 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 11007 transitions. Word has length 540 [2023-11-29 01:15:42,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:42,999 INFO L495 AbstractCegarLoop]: Abstraction has 7071 states and 11007 transitions. [2023-11-29 01:15:42,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:43,000 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 11007 transitions. [2023-11-29 01:15:43,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2023-11-29 01:15:43,019 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:43,020 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:43,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 01:15:43,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 01:15:43,221 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:43,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:43,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1028457613, now seen corresponding path program 1 times [2023-11-29 01:15:43,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:43,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873889792] [2023-11-29 01:15:43,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:43,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:43,302 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:15:43,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811252584] [2023-11-29 01:15:43,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:43,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:43,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:43,304 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:43,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:15:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:43,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 1347 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:15:43,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 5370 proven. 72 refuted. 0 times theorem prover too weak. 6882 trivial. 0 not checked. [2023-11-29 01:15:44,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:15:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 162 proven. 72 refuted. 0 times theorem prover too weak. 12090 trivial. 0 not checked. [2023-11-29 01:15:44,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:44,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873889792] [2023-11-29 01:15:44,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:15:44,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811252584] [2023-11-29 01:15:44,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811252584] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:15:44,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:15:44,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 01:15:44,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754405936] [2023-11-29 01:15:44,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:15:44,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:15:44,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:44,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:15:44,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:15:44,448 INFO L87 Difference]: Start difference. First operand 7071 states and 11007 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2023-11-29 01:15:45,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:45,314 INFO L93 Difference]: Finished difference Result 13619 states and 21180 transitions. [2023-11-29 01:15:45,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:15:45,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) Word has length 540 [2023-11-29 01:15:45,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:45,335 INFO L225 Difference]: With dead ends: 13619 [2023-11-29 01:15:45,335 INFO L226 Difference]: Without dead ends: 6537 [2023-11-29 01:15:45,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 1072 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:15:45,347 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 659 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:45,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 1029 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:15:45,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6537 states. [2023-11-29 01:15:45,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6537 to 6485. [2023-11-29 01:15:45,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6485 states, 5785 states have (on average 1.5120138288677614) internal successors, (8747), 5788 states have internal predecessors, (8747), 657 states have call successors, (657), 42 states have call predecessors, (657), 42 states have return successors, (657), 654 states have call predecessors, (657), 657 states have call successors, (657) [2023-11-29 01:15:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6485 states to 6485 states and 10061 transitions. [2023-11-29 01:15:45,782 INFO L78 Accepts]: Start accepts. Automaton has 6485 states and 10061 transitions. Word has length 540 [2023-11-29 01:15:45,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:45,783 INFO L495 AbstractCegarLoop]: Abstraction has 6485 states and 10061 transitions. [2023-11-29 01:15:45,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2023-11-29 01:15:45,783 INFO L276 IsEmpty]: Start isEmpty. Operand 6485 states and 10061 transitions. [2023-11-29 01:15:45,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2023-11-29 01:15:45,789 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:45,790 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:45,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:15:45,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 01:15:45,991 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:45,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:45,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1207115383, now seen corresponding path program 1 times [2023-11-29 01:15:45,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:45,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26652307] [2023-11-29 01:15:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:45,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:46,069 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:15:46,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722788207] [2023-11-29 01:15:46,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:46,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:46,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:46,072 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:46,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:15:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:46,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 1343 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:15:46,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 4260 proven. 183 refuted. 0 times theorem prover too weak. 7881 trivial. 0 not checked. [2023-11-29 01:15:47,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:15:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 51 proven. 183 refuted. 0 times theorem prover too weak. 12090 trivial. 0 not checked. [2023-11-29 01:15:47,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:47,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26652307] [2023-11-29 01:15:47,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:15:47,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722788207] [2023-11-29 01:15:47,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722788207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:15:47,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:15:47,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 01:15:47,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437493581] [2023-11-29 01:15:47,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:15:47,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:15:47,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:47,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:15:47,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:15:47,641 INFO L87 Difference]: Start difference. First operand 6485 states and 10061 transitions. Second operand has 10 states, 10 states have (on average 20.3) internal successors, (203), 10 states have internal predecessors, (203), 3 states have call successors, (140), 2 states have call predecessors, (140), 4 states have return successors, (141), 3 states have call predecessors, (141), 3 states have call successors, (141) [2023-11-29 01:15:48,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:48,439 INFO L93 Difference]: Finished difference Result 13053 states and 20196 transitions. [2023-11-29 01:15:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:15:48,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.3) internal successors, (203), 10 states have internal predecessors, (203), 3 states have call successors, (140), 2 states have call predecessors, (140), 4 states have return successors, (141), 3 states have call predecessors, (141), 3 states have call successors, (141) Word has length 540 [2023-11-29 01:15:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:48,455 INFO L225 Difference]: With dead ends: 13053 [2023-11-29 01:15:48,456 INFO L226 Difference]: Without dead ends: 6569 [2023-11-29 01:15:48,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1083 GetRequests, 1070 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:15:48,465 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 770 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:48,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 1459 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:15:48,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6569 states. [2023-11-29 01:15:48,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6569 to 6521. [2023-11-29 01:15:48,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6521 states, 5812 states have (on average 1.5068823124569855) internal successors, (8758), 5815 states have internal predecessors, (8758), 657 states have call successors, (657), 51 states have call predecessors, (657), 51 states have return successors, (657), 654 states have call predecessors, (657), 657 states have call successors, (657) [2023-11-29 01:15:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6521 states to 6521 states and 10072 transitions. [2023-11-29 01:15:48,889 INFO L78 Accepts]: Start accepts. Automaton has 6521 states and 10072 transitions. Word has length 540 [2023-11-29 01:15:48,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:48,890 INFO L495 AbstractCegarLoop]: Abstraction has 6521 states and 10072 transitions. [2023-11-29 01:15:48,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.3) internal successors, (203), 10 states have internal predecessors, (203), 3 states have call successors, (140), 2 states have call predecessors, (140), 4 states have return successors, (141), 3 states have call predecessors, (141), 3 states have call successors, (141) [2023-11-29 01:15:48,890 INFO L276 IsEmpty]: Start isEmpty. Operand 6521 states and 10072 transitions. [2023-11-29 01:15:48,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2023-11-29 01:15:48,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:48,898 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:48,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 01:15:49,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 01:15:49,099 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:49,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:49,100 INFO L85 PathProgramCache]: Analyzing trace with hash 620839161, now seen corresponding path program 1 times [2023-11-29 01:15:49,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:49,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963935308] [2023-11-29 01:15:49,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:49,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:49,184 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:15:49,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694313254] [2023-11-29 01:15:49,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:49,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:49,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:49,186 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:49,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:15:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:49,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:15:49,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:15:51,064 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:15:51,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:51,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963935308] [2023-11-29 01:15:51,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:15:51,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694313254] [2023-11-29 01:15:51,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694313254] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:15:51,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:15:51,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:15:51,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515544194] [2023-11-29 01:15:51,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:15:51,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:15:51,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:51,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:15:51,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:15:51,068 INFO L87 Difference]: Start difference. First operand 6521 states and 10072 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:51,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:51,875 INFO L93 Difference]: Finished difference Result 15853 states and 24520 transitions. [2023-11-29 01:15:51,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:15:51,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 540 [2023-11-29 01:15:51,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:51,886 INFO L225 Difference]: With dead ends: 15853 [2023-11-29 01:15:51,886 INFO L226 Difference]: Without dead ends: 9333 [2023-11-29 01:15:51,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 536 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:15:51,890 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 557 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 1737 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:51,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 1737 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:15:51,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9333 states. [2023-11-29 01:15:52,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9333 to 9009. [2023-11-29 01:15:52,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9009 states, 8215 states have (on average 1.518563603164942) internal successors, (12475), 8218 states have internal predecessors, (12475), 736 states have call successors, (736), 57 states have call predecessors, (736), 57 states have return successors, (736), 733 states have call predecessors, (736), 736 states have call successors, (736) [2023-11-29 01:15:52,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9009 states to 9009 states and 13947 transitions. [2023-11-29 01:15:52,344 INFO L78 Accepts]: Start accepts. Automaton has 9009 states and 13947 transitions. Word has length 540 [2023-11-29 01:15:52,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:52,344 INFO L495 AbstractCegarLoop]: Abstraction has 9009 states and 13947 transitions. [2023-11-29 01:15:52,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:15:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand 9009 states and 13947 transitions. [2023-11-29 01:15:52,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2023-11-29 01:15:52,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:52,351 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:52,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:15:52,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:15:52,552 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:52,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:52,552 INFO L85 PathProgramCache]: Analyzing trace with hash -668677050, now seen corresponding path program 1 times [2023-11-29 01:15:52,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:52,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328880443] [2023-11-29 01:15:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:52,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:52,615 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:15:52,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957128818] [2023-11-29 01:15:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:52,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:52,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:52,616 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:52,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:15:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:53,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 1349 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 01:15:53,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 4416 proven. 72 refuted. 0 times theorem prover too weak. 7836 trivial. 0 not checked. [2023-11-29 01:15:54,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:15:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 390 proven. 75 refuted. 0 times theorem prover too weak. 11859 trivial. 0 not checked. [2023-11-29 01:15:55,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:55,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328880443] [2023-11-29 01:15:55,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:15:55,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957128818] [2023-11-29 01:15:55,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957128818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:15:55,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:15:55,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-11-29 01:15:55,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796719177] [2023-11-29 01:15:55,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:15:55,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:15:55,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:55,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:15:55,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:15:55,248 INFO L87 Difference]: Start difference. First operand 9009 states and 13947 transitions. Second operand has 19 states, 19 states have (on average 14.157894736842104) internal successors, (269), 19 states have internal predecessors, (269), 6 states have call successors, (158), 4 states have call predecessors, (158), 8 states have return successors, (158), 6 states have call predecessors, (158), 6 states have call successors, (158) [2023-11-29 01:15:59,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:59,040 INFO L93 Difference]: Finished difference Result 18727 states and 28856 transitions. [2023-11-29 01:15:59,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 01:15:59,041 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 14.157894736842104) internal successors, (269), 19 states have internal predecessors, (269), 6 states have call successors, (158), 4 states have call predecessors, (158), 8 states have return successors, (158), 6 states have call predecessors, (158), 6 states have call successors, (158) Word has length 542 [2023-11-29 01:15:59,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:59,064 INFO L225 Difference]: With dead ends: 18727 [2023-11-29 01:15:59,064 INFO L226 Difference]: Without dead ends: 10362 [2023-11-29 01:15:59,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1108 GetRequests, 1069 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=576, Invalid=1064, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 01:15:59,076 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 2484 mSDsluCounter, 2785 mSDsCounter, 0 mSdLazyCounter, 2188 mSolverCounterSat, 984 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2485 SdHoareTripleChecker+Valid, 3158 SdHoareTripleChecker+Invalid, 3172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 984 IncrementalHoareTripleChecker+Valid, 2188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:59,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2485 Valid, 3158 Invalid, 3172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [984 Valid, 2188 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 01:15:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10362 states. [2023-11-29 01:15:59,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10362 to 9490. [2023-11-29 01:15:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9490 states, 8549 states have (on average 1.4960814130307638) internal successors, (12790), 8554 states have internal predecessors, (12790), 858 states have call successors, (858), 82 states have call predecessors, (858), 82 states have return successors, (858), 853 states have call predecessors, (858), 858 states have call successors, (858) [2023-11-29 01:15:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9490 states to 9490 states and 14506 transitions. [2023-11-29 01:15:59,726 INFO L78 Accepts]: Start accepts. Automaton has 9490 states and 14506 transitions. Word has length 542 [2023-11-29 01:15:59,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:59,726 INFO L495 AbstractCegarLoop]: Abstraction has 9490 states and 14506 transitions. [2023-11-29 01:15:59,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 14.157894736842104) internal successors, (269), 19 states have internal predecessors, (269), 6 states have call successors, (158), 4 states have call predecessors, (158), 8 states have return successors, (158), 6 states have call predecessors, (158), 6 states have call successors, (158) [2023-11-29 01:15:59,727 INFO L276 IsEmpty]: Start isEmpty. Operand 9490 states and 14506 transitions. [2023-11-29 01:15:59,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2023-11-29 01:15:59,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:59,732 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:59,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:15:59,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:15:59,933 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:59,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:59,933 INFO L85 PathProgramCache]: Analyzing trace with hash -547924946, now seen corresponding path program 1 times [2023-11-29 01:15:59,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:59,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109186318] [2023-11-29 01:15:59,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:59,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:59,993 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:15:59,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441212165] [2023-11-29 01:15:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:59,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:59,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:59,995 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:59,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:16:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:16:00,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 1355 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:16:00,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:16:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 3270 proven. 198 refuted. 0 times theorem prover too weak. 8856 trivial. 0 not checked. [2023-11-29 01:16:03,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:16:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:16:04,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:16:04,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109186318] [2023-11-29 01:16:04,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:16:04,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441212165] [2023-11-29 01:16:04,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441212165] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:16:04,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:16:04,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-11-29 01:16:04,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813825049] [2023-11-29 01:16:04,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:16:04,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:16:04,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:16:04,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:16:04,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:16:04,247 INFO L87 Difference]: Start difference. First operand 9490 states and 14506 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 2 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-29 01:16:05,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:16:05,410 INFO L93 Difference]: Finished difference Result 24085 states and 36921 transitions. [2023-11-29 01:16:05,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:16:05,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 2 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) Word has length 545 [2023-11-29 01:16:05,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:16:05,428 INFO L225 Difference]: With dead ends: 24085 [2023-11-29 01:16:05,428 INFO L226 Difference]: Without dead ends: 14768 [2023-11-29 01:16:05,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1090 GetRequests, 1081 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:16:05,438 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 636 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 2136 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:16:05,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 2136 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:16:05,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14768 states. [2023-11-29 01:16:06,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14768 to 14208. [2023-11-29 01:16:06,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14208 states, 13267 states have (on average 1.5151126856109143) internal successors, (20101), 13272 states have internal predecessors, (20101), 858 states have call successors, (858), 82 states have call predecessors, (858), 82 states have return successors, (858), 853 states have call predecessors, (858), 858 states have call successors, (858) [2023-11-29 01:16:06,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14208 states to 14208 states and 21817 transitions. [2023-11-29 01:16:06,245 INFO L78 Accepts]: Start accepts. Automaton has 14208 states and 21817 transitions. Word has length 545 [2023-11-29 01:16:06,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:16:06,246 INFO L495 AbstractCegarLoop]: Abstraction has 14208 states and 21817 transitions. [2023-11-29 01:16:06,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 2 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-29 01:16:06,246 INFO L276 IsEmpty]: Start isEmpty. Operand 14208 states and 21817 transitions. [2023-11-29 01:16:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2023-11-29 01:16:06,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:16:06,255 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:16:06,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 01:16:06,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:16:06,456 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:16:06,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:16:06,456 INFO L85 PathProgramCache]: Analyzing trace with hash 928824683, now seen corresponding path program 1 times [2023-11-29 01:16:06,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:16:06,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766968362] [2023-11-29 01:16:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:16:06,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:16:06,538 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:16:06,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869540954] [2023-11-29 01:16:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:16:06,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:16:06,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:16:06,540 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:16:06,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:16:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:16:07,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:16:07,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:16:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 3790 proven. 42 refuted. 0 times theorem prover too weak. 8492 trivial. 0 not checked. [2023-11-29 01:16:09,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:16:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 192 proven. 42 refuted. 0 times theorem prover too weak. 12090 trivial. 0 not checked. [2023-11-29 01:16:11,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:16:11,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766968362] [2023-11-29 01:16:11,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:16:11,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869540954] [2023-11-29 01:16:11,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869540954] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:16:11,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:16:11,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-11-29 01:16:11,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622436003] [2023-11-29 01:16:11,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:16:11,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:16:11,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:16:11,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:16:11,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:16:11,588 INFO L87 Difference]: Start difference. First operand 14208 states and 21817 transitions. Second operand has 20 states, 20 states have (on average 13.9) internal successors, (278), 20 states have internal predecessors, (278), 4 states have call successors, (158), 3 states have call predecessors, (158), 5 states have return successors, (158), 4 states have call predecessors, (158), 4 states have call successors, (158) [2023-11-29 01:16:25,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:16:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:16:30,446 INFO L93 Difference]: Finished difference Result 69801 states and 107373 transitions. [2023-11-29 01:16:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 01:16:30,447 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 13.9) internal successors, (278), 20 states have internal predecessors, (278), 4 states have call successors, (158), 3 states have call predecessors, (158), 5 states have return successors, (158), 4 states have call predecessors, (158), 4 states have call successors, (158) Word has length 546 [2023-11-29 01:16:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:16:30,522 INFO L225 Difference]: With dead ends: 69801 [2023-11-29 01:16:30,522 INFO L226 Difference]: Without dead ends: 56735 [2023-11-29 01:16:30,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1143 GetRequests, 1083 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=783, Invalid=2999, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 01:16:30,537 INFO L413 NwaCegarLoop]: 876 mSDtfsCounter, 9217 mSDsluCounter, 6824 mSDsCounter, 0 mSdLazyCounter, 5115 mSolverCounterSat, 2063 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9359 SdHoareTripleChecker+Valid, 7700 SdHoareTripleChecker+Invalid, 7179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2063 IncrementalHoareTripleChecker+Valid, 5115 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:16:30,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9359 Valid, 7700 Invalid, 7179 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2063 Valid, 5115 Invalid, 1 Unknown, 0 Unchecked, 13.8s Time] [2023-11-29 01:16:30,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56735 states. [2023-11-29 01:16:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56735 to 35780. [2023-11-29 01:16:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35780 states, 33836 states have (on average 1.5232296961815817) internal successors, (51540), 33848 states have internal predecessors, (51540), 1765 states have call successors, (1765), 178 states have call predecessors, (1765), 178 states have return successors, (1765), 1753 states have call predecessors, (1765), 1765 states have call successors, (1765) [2023-11-29 01:16:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35780 states to 35780 states and 55070 transitions. [2023-11-29 01:16:32,562 INFO L78 Accepts]: Start accepts. Automaton has 35780 states and 55070 transitions. Word has length 546 [2023-11-29 01:16:32,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:16:32,563 INFO L495 AbstractCegarLoop]: Abstraction has 35780 states and 55070 transitions. [2023-11-29 01:16:32,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.9) internal successors, (278), 20 states have internal predecessors, (278), 4 states have call successors, (158), 3 states have call predecessors, (158), 5 states have return successors, (158), 4 states have call predecessors, (158), 4 states have call successors, (158) [2023-11-29 01:16:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 35780 states and 55070 transitions. [2023-11-29 01:16:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2023-11-29 01:16:32,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:16:32,575 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:16:32,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 01:16:32,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:16:32,776 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:16:32,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:16:32,776 INFO L85 PathProgramCache]: Analyzing trace with hash -442982615, now seen corresponding path program 1 times [2023-11-29 01:16:32,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:16:32,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493795728] [2023-11-29 01:16:32,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:16:32,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:16:32,848 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:16:32,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388632607] [2023-11-29 01:16:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:16:32,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:16:32,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:16:32,850 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:16:32,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:16:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:16:33,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 1359 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 01:16:33,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:16:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 7096 proven. 762 refuted. 0 times theorem prover too weak. 4466 trivial. 0 not checked. [2023-11-29 01:16:38,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:16:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 267 proven. 426 refuted. 0 times theorem prover too weak. 11631 trivial. 0 not checked. [2023-11-29 01:16:39,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:16:39,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493795728] [2023-11-29 01:16:39,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:16:39,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388632607] [2023-11-29 01:16:39,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388632607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:16:39,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:16:39,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 36 [2023-11-29 01:16:39,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888388714] [2023-11-29 01:16:39,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:16:39,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 01:16:39,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:16:39,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 01:16:39,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 01:16:39,616 INFO L87 Difference]: Start difference. First operand 35780 states and 55070 transitions. Second operand has 36 states, 35 states have (on average 8.685714285714285) internal successors, (304), 33 states have internal predecessors, (304), 9 states have call successors, (149), 6 states have call predecessors, (149), 12 states have return successors, (150), 9 states have call predecessors, (150), 9 states have call successors, (150) [2023-11-29 01:16:57,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:17:02,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:17:02,152 INFO L93 Difference]: Finished difference Result 122368 states and 187707 transitions. [2023-11-29 01:17:02,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-11-29 01:17:02,153 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 8.685714285714285) internal successors, (304), 33 states have internal predecessors, (304), 9 states have call successors, (149), 6 states have call predecessors, (149), 12 states have return successors, (150), 9 states have call predecessors, (150), 9 states have call successors, (150) Word has length 546 [2023-11-29 01:17:02,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:17:02,350 INFO L225 Difference]: With dead ends: 122368 [2023-11-29 01:17:02,350 INFO L226 Difference]: Without dead ends: 87651 [2023-11-29 01:17:02,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1202 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6251 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=3997, Invalid=14909, Unknown=0, NotChecked=0, Total=18906 [2023-11-29 01:17:02,386 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 7599 mSDsluCounter, 5962 mSDsCounter, 0 mSdLazyCounter, 5642 mSolverCounterSat, 1179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7599 SdHoareTripleChecker+Valid, 6566 SdHoareTripleChecker+Invalid, 6821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1179 IncrementalHoareTripleChecker+Valid, 5642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:17:02,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7599 Valid, 6566 Invalid, 6821 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1179 Valid, 5642 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-11-29 01:17:02,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87651 states. [2023-11-29 01:17:06,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87651 to 61218. [2023-11-29 01:17:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61218 states, 58528 states have (on average 1.504100601421542) internal successors, (88032), 58540 states have internal predecessors, (88032), 2239 states have call successors, (2239), 450 states have call predecessors, (2239), 450 states have return successors, (2239), 2227 states have call predecessors, (2239), 2239 states have call successors, (2239) [2023-11-29 01:17:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61218 states to 61218 states and 92510 transitions. [2023-11-29 01:17:06,646 INFO L78 Accepts]: Start accepts. Automaton has 61218 states and 92510 transitions. Word has length 546 [2023-11-29 01:17:06,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:17:06,647 INFO L495 AbstractCegarLoop]: Abstraction has 61218 states and 92510 transitions. [2023-11-29 01:17:06,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 8.685714285714285) internal successors, (304), 33 states have internal predecessors, (304), 9 states have call successors, (149), 6 states have call predecessors, (149), 12 states have return successors, (150), 9 states have call predecessors, (150), 9 states have call successors, (150) [2023-11-29 01:17:06,647 INFO L276 IsEmpty]: Start isEmpty. Operand 61218 states and 92510 transitions. [2023-11-29 01:17:06,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2023-11-29 01:17:06,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:17:06,664 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:17:06,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:17:06,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:17:06,865 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:17:06,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:17:06,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1480245419, now seen corresponding path program 1 times [2023-11-29 01:17:06,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:17:06,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243613418] [2023-11-29 01:17:06,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:17:06,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:17:06,940 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:17:06,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861310795] [2023-11-29 01:17:06,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:17:06,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:17:06,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:17:06,942 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:17:06,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:17:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:17:07,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 1357 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:17:07,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:17:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:17:08,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:17:08,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:17:08,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243613418] [2023-11-29 01:17:08,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:17:08,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861310795] [2023-11-29 01:17:08,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861310795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:17:08,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:17:08,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:17:08,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902739351] [2023-11-29 01:17:08,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:17:08,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:17:08,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:17:08,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:17:08,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:17:08,475 INFO L87 Difference]: Start difference. First operand 61218 states and 92510 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:17:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:17:15,322 INFO L93 Difference]: Finished difference Result 171714 states and 259478 transitions. [2023-11-29 01:17:15,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:17:15,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 546 [2023-11-29 01:17:15,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:17:15,472 INFO L225 Difference]: With dead ends: 171714 [2023-11-29 01:17:15,472 INFO L226 Difference]: Without dead ends: 118047 [2023-11-29 01:17:15,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:17:15,504 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 197 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:17:15,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 1253 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:17:15,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118047 states. [2023-11-29 01:17:23,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118047 to 116225. [2023-11-29 01:17:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116225 states, 110941 states have (on average 1.5031413093446067) internal successors, (166760), 110965 states have internal predecessors, (166760), 4399 states have call successors, (4399), 884 states have call predecessors, (4399), 884 states have return successors, (4399), 4375 states have call predecessors, (4399), 4399 states have call successors, (4399) [2023-11-29 01:17:23,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116225 states to 116225 states and 175558 transitions. [2023-11-29 01:17:23,379 INFO L78 Accepts]: Start accepts. Automaton has 116225 states and 175558 transitions. Word has length 546 [2023-11-29 01:17:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:17:23,379 INFO L495 AbstractCegarLoop]: Abstraction has 116225 states and 175558 transitions. [2023-11-29 01:17:23,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:17:23,380 INFO L276 IsEmpty]: Start isEmpty. Operand 116225 states and 175558 transitions. [2023-11-29 01:17:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2023-11-29 01:17:23,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:17:23,396 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:17:23,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:17:23,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:17:23,597 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:17:23,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:17:23,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1619237904, now seen corresponding path program 1 times [2023-11-29 01:17:23,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:17:23,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528806780] [2023-11-29 01:17:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:17:23,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:17:23,673 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:17:23,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749610104] [2023-11-29 01:17:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:17:23,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:17:23,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:17:23,675 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:17:23,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:17:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:17:24,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:17:24,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:17:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:17:25,200 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:17:25,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:17:25,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528806780] [2023-11-29 01:17:25,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:17:25,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749610104] [2023-11-29 01:17:25,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749610104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:17:25,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:17:25,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:17:25,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829141720] [2023-11-29 01:17:25,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:17:25,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:17:25,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:17:25,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:17:25,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:17:25,202 INFO L87 Difference]: Start difference. First operand 116225 states and 175558 transitions. Second operand has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 6 states have internal predecessors, (155), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:17:33,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:17:33,221 INFO L93 Difference]: Finished difference Result 238264 states and 359992 transitions. [2023-11-29 01:17:33,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:17:33,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 6 states have internal predecessors, (155), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 547 [2023-11-29 01:17:33,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:17:33,410 INFO L225 Difference]: With dead ends: 238264 [2023-11-29 01:17:33,410 INFO L226 Difference]: Without dead ends: 133097 [2023-11-29 01:17:33,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:17:33,480 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 864 mSDsluCounter, 2279 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 2826 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:17:33,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 2826 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 01:17:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133097 states. [2023-11-29 01:17:41,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133097 to 131698. [2023-11-29 01:17:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131698 states, 125933 states have (on average 1.5041013872455988) internal successors, (189416), 125987 states have internal predecessors, (189416), 4789 states have call successors, (4789), 975 states have call predecessors, (4789), 975 states have return successors, (4789), 4735 states have call predecessors, (4789), 4789 states have call successors, (4789) [2023-11-29 01:17:41,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131698 states to 131698 states and 198994 transitions. [2023-11-29 01:17:41,798 INFO L78 Accepts]: Start accepts. Automaton has 131698 states and 198994 transitions. Word has length 547 [2023-11-29 01:17:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:17:41,798 INFO L495 AbstractCegarLoop]: Abstraction has 131698 states and 198994 transitions. [2023-11-29 01:17:41,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 6 states have internal predecessors, (155), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:17:41,798 INFO L276 IsEmpty]: Start isEmpty. Operand 131698 states and 198994 transitions. [2023-11-29 01:17:41,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2023-11-29 01:17:41,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:17:41,955 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:17:41,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 01:17:42,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:17:42,156 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:17:42,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:17:42,157 INFO L85 PathProgramCache]: Analyzing trace with hash 473315964, now seen corresponding path program 1 times [2023-11-29 01:17:42,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:17:42,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977538926] [2023-11-29 01:17:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:17:42,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:17:42,218 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:17:42,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697918540] [2023-11-29 01:17:42,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:17:42,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:17:42,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:17:42,220 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:17:42,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 01:17:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:17:42,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 1360 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 01:17:43,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:17:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:17:44,299 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:17:44,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:17:44,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977538926] [2023-11-29 01:17:44,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:17:44,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697918540] [2023-11-29 01:17:44,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697918540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:17:44,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:17:44,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:17:44,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198778580] [2023-11-29 01:17:44,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:17:44,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:17:44,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:17:44,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:17:44,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:17:44,303 INFO L87 Difference]: Start difference. First operand 131698 states and 198994 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:17:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:17:51,064 INFO L93 Difference]: Finished difference Result 258392 states and 390590 transitions. [2023-11-29 01:17:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:17:51,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 547 [2023-11-29 01:17:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:17:51,206 INFO L225 Difference]: With dead ends: 258392 [2023-11-29 01:17:51,206 INFO L226 Difference]: Without dead ends: 127813 [2023-11-29 01:17:51,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:17:51,262 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 326 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:17:51,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 1439 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:17:51,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127813 states. [2023-11-29 01:17:57,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127813 to 127122. [2023-11-29 01:17:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127122 states, 122015 states have (on average 1.5065688644838748) internal successors, (183824), 122057 states have internal predecessors, (183824), 4245 states have call successors, (4245), 861 states have call predecessors, (4245), 861 states have return successors, (4245), 4203 states have call predecessors, (4245), 4245 states have call successors, (4245) [2023-11-29 01:17:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127122 states to 127122 states and 192314 transitions. [2023-11-29 01:17:58,234 INFO L78 Accepts]: Start accepts. Automaton has 127122 states and 192314 transitions. Word has length 547 [2023-11-29 01:17:58,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:17:58,235 INFO L495 AbstractCegarLoop]: Abstraction has 127122 states and 192314 transitions. [2023-11-29 01:17:58,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-29 01:17:58,235 INFO L276 IsEmpty]: Start isEmpty. Operand 127122 states and 192314 transitions. [2023-11-29 01:17:58,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2023-11-29 01:17:58,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:17:58,245 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:17:58,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 01:17:58,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:17:58,446 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:17:58,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:17:58,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1145658950, now seen corresponding path program 1 times [2023-11-29 01:17:58,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:17:58,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337480235] [2023-11-29 01:17:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:17:58,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:17:58,496 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:17:58,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541074285] [2023-11-29 01:17:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:17:58,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:17:58,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:17:58,497 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:17:58,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 01:17:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:17:59,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:17:59,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:18:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 2680 proven. 411 refuted. 0 times theorem prover too weak. 9233 trivial. 0 not checked. [2023-11-29 01:18:02,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:18:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 24 proven. 210 refuted. 0 times theorem prover too weak. 12090 trivial. 0 not checked. [2023-11-29 01:18:06,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:18:06,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337480235] [2023-11-29 01:18:06,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:18:06,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541074285] [2023-11-29 01:18:06,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541074285] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:18:06,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:18:06,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2023-11-29 01:18:06,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733392132] [2023-11-29 01:18:06,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:18:06,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 01:18:06,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:18:06,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 01:18:06,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:18:06,466 INFO L87 Difference]: Start difference. First operand 127122 states and 192314 transitions. Second operand has 21 states, 21 states have (on average 14.238095238095237) internal successors, (299), 21 states have internal predecessors, (299), 5 states have call successors, (158), 4 states have call predecessors, (158), 7 states have return successors, (158), 5 states have call predecessors, (158), 5 states have call successors, (158) [2023-11-29 01:18:39,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:18:39,433 INFO L93 Difference]: Finished difference Result 1308061 states and 2001851 transitions. [2023-11-29 01:18:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 01:18:39,434 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 14.238095238095237) internal successors, (299), 21 states have internal predecessors, (299), 5 states have call successors, (158), 4 states have call predecessors, (158), 7 states have return successors, (158), 5 states have call predecessors, (158), 5 states have call successors, (158) Word has length 547 [2023-11-29 01:18:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:18:41,258 INFO L225 Difference]: With dead ends: 1308061 [2023-11-29 01:18:41,258 INFO L226 Difference]: Without dead ends: 1181472 [2023-11-29 01:18:41,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1143 GetRequests, 1080 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=952, Invalid=2830, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 01:18:41,412 INFO L413 NwaCegarLoop]: 1094 mSDtfsCounter, 6980 mSDsluCounter, 9217 mSDsCounter, 0 mSdLazyCounter, 3621 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7057 SdHoareTripleChecker+Valid, 10311 SdHoareTripleChecker+Invalid, 4567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 3621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:18:41,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7057 Valid, 10311 Invalid, 4567 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [946 Valid, 3621 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-29 01:18:42,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181472 states. [2023-11-29 01:19:08,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181472 to 497435. [2023-11-29 01:19:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497435 states, 482569 states have (on average 1.5132281601180348) internal successors, (730237), 482689 states have internal predecessors, (730237), 12299 states have call successors, (12299), 2566 states have call predecessors, (12299), 2566 states have return successors, (12299), 12179 states have call predecessors, (12299), 12299 states have call successors, (12299) [2023-11-29 01:19:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497435 states to 497435 states and 754835 transitions. [2023-11-29 01:19:10,708 INFO L78 Accepts]: Start accepts. Automaton has 497435 states and 754835 transitions. Word has length 547 [2023-11-29 01:19:10,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:10,709 INFO L495 AbstractCegarLoop]: Abstraction has 497435 states and 754835 transitions. [2023-11-29 01:19:10,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 14.238095238095237) internal successors, (299), 21 states have internal predecessors, (299), 5 states have call successors, (158), 4 states have call predecessors, (158), 7 states have return successors, (158), 5 states have call predecessors, (158), 5 states have call successors, (158) [2023-11-29 01:19:10,709 INFO L276 IsEmpty]: Start isEmpty. Operand 497435 states and 754835 transitions. [2023-11-29 01:19:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2023-11-29 01:19:10,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:10,742 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:10,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 01:19:10,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:10,942 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:10,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:10,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1200051848, now seen corresponding path program 1 times [2023-11-29 01:19:10,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:10,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713713000] [2023-11-29 01:19:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:10,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:11,004 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:19:11,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014771270] [2023-11-29 01:19:11,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:11,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:11,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:11,006 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:11,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 01:20:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:20:02,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 01:20:02,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:20:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 6725 proven. 1161 refuted. 0 times theorem prover too weak. 4438 trivial. 0 not checked. [2023-11-29 01:20:15,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:20:22,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:20:22,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713713000] [2023-11-29 01:20:22,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:20:22,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014771270] [2023-11-29 01:20:22,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014771270] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:20:22,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:20:22,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-11-29 01:20:22,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105814880] [2023-11-29 01:20:22,770 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:20:22,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 01:20:22,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:20:22,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 01:20:22,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2023-11-29 01:20:22,773 INFO L87 Difference]: Start difference. First operand 497435 states and 754835 transitions. Second operand has 28 states, 28 states have (on average 6.821428571428571) internal successors, (191), 25 states have internal predecessors, (191), 8 states have call successors, (79), 8 states have call predecessors, (79), 13 states have return successors, (79), 8 states have call predecessors, (79), 8 states have call successors, (79) [2023-11-29 01:20:29,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:21:29,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:21:29,148 INFO L93 Difference]: Finished difference Result 2219590 states and 3388341 transitions. [2023-11-29 01:21:29,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 01:21:29,149 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.821428571428571) internal successors, (191), 25 states have internal predecessors, (191), 8 states have call successors, (79), 8 states have call predecessors, (79), 13 states have return successors, (79), 8 states have call predecessors, (79), 8 states have call successors, (79) Word has length 547 [2023-11-29 01:21:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:21:31,874 INFO L225 Difference]: With dead ends: 2219590 [2023-11-29 01:21:31,874 INFO L226 Difference]: Without dead ends: 1743176 [2023-11-29 01:21:32,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 621 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1124, Invalid=4576, Unknown=0, NotChecked=0, Total=5700 [2023-11-29 01:21:32,161 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 3064 mSDsluCounter, 5789 mSDsCounter, 0 mSdLazyCounter, 3244 mSolverCounterSat, 269 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3064 SdHoareTripleChecker+Valid, 6408 SdHoareTripleChecker+Invalid, 3514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 3244 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:21:32,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3064 Valid, 6408 Invalid, 3514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 3244 Invalid, 1 Unknown, 0 Unchecked, 8.2s Time] [2023-11-29 01:21:33,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743176 states. [2023-11-29 01:22:20,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743176 to 1073092. [2023-11-29 01:22:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073092 states, 1045276 states have (on average 1.5155423065295672) internal successors, (1584160), 1045576 states have internal predecessors, (1584160), 22591 states have call successors, (22591), 5224 states have call predecessors, (22591), 5224 states have return successors, (22591), 22291 states have call predecessors, (22591), 22591 states have call successors, (22591) [2023-11-29 01:22:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073092 states to 1073092 states and 1629342 transitions. [2023-11-29 01:22:25,298 INFO L78 Accepts]: Start accepts. Automaton has 1073092 states and 1629342 transitions. Word has length 547 [2023-11-29 01:22:25,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:22:25,298 INFO L495 AbstractCegarLoop]: Abstraction has 1073092 states and 1629342 transitions. [2023-11-29 01:22:25,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.821428571428571) internal successors, (191), 25 states have internal predecessors, (191), 8 states have call successors, (79), 8 states have call predecessors, (79), 13 states have return successors, (79), 8 states have call predecessors, (79), 8 states have call successors, (79) [2023-11-29 01:22:25,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1073092 states and 1629342 transitions. [2023-11-29 01:22:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2023-11-29 01:22:25,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:22:25,352 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:22:25,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 01:22:25,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 01:22:25,553 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:22:25,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:22:25,553 INFO L85 PathProgramCache]: Analyzing trace with hash 151333370, now seen corresponding path program 1 times [2023-11-29 01:22:25,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:22:25,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761930540] [2023-11-29 01:22:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:22:25,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:22:25,616 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:22:25,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692828311] [2023-11-29 01:22:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:22:25,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:22:25,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:22:25,618 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:22:25,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f46cc52e-e03c-4a14-bbd1-d2b0082cbfb7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 01:22:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:22:26,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 1356 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:22:26,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:22:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:22:26,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:22:26,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:22:26,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761930540] [2023-11-29 01:22:26,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:22:26,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692828311] [2023-11-29 01:22:26,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692828311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:22:26,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:22:26,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:22:26,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57852598] [2023-11-29 01:22:26,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:22:26,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:22:26,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:22:26,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:22:26,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:22:26,822 INFO L87 Difference]: Start difference. First operand 1073092 states and 1629342 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79)