./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/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_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/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_c7b86713-b74e-4389-8e3b-d8934b863785/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 938d0421a545f95d5fd4476ad4101c37e59d7c0d9287a6793e2d4f45bec79d41 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:03:55,649 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:03:55,732 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 03:03:55,737 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:03:55,738 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:03:55,767 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:03:55,768 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:03:55,769 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:03:55,769 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:03:55,770 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:03:55,770 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:03:55,771 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:03:55,772 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:03:55,772 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:03:55,773 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:03:55,773 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:03:55,774 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:03:55,774 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:03:55,775 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:03:55,775 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:03:55,775 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:03:55,776 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:03:55,776 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:03:55,777 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:03:55,777 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:03:55,777 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:03:55,778 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:03:55,778 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:03:55,779 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:03:55,779 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:03:55,779 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:03:55,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:03:55,780 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:03:55,780 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:03:55,780 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:03:55,780 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:03:55,781 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:03:55,781 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:03:55,781 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:03:55,781 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:03:55,781 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:03:55,782 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:03:55,782 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_c7b86713-b74e-4389-8e3b-d8934b863785/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 938d0421a545f95d5fd4476ad4101c37e59d7c0d9287a6793e2d4f45bec79d41 [2023-11-29 03:03:56,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:03:56,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:03:56,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:03:56,067 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:03:56,067 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:03:56,069 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-11.i [2023-11-29 03:03:58,750 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:03:58,992 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:03:58,993 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-11.i [2023-11-29 03:03:59,006 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/data/fc70ecb0a/a96369df257e49319b4bb98b1a1d9207/FLAG99f9d7744 [2023-11-29 03:03:59,020 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/data/fc70ecb0a/a96369df257e49319b4bb98b1a1d9207 [2023-11-29 03:03:59,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:03:59,024 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:03:59,025 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:03:59,026 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:03:59,030 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:03:59,031 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:03:59" (1/1) ... [2023-11-29 03:03:59,032 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62b5f001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:03:59, skipping insertion in model container [2023-11-29 03:03:59,032 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:03:59" (1/1) ... [2023-11-29 03:03:59,086 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:03:59,205 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_c7b86713-b74e-4389-8e3b-d8934b863785/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-11.i[916,929] [2023-11-29 03:03:59,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:03:59,367 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:03:59,377 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_c7b86713-b74e-4389-8e3b-d8934b863785/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-11.i[916,929] [2023-11-29 03:03:59,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:03:59,473 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:03:59,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:03:59 WrapperNode [2023-11-29 03:03:59,474 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:03:59,475 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:03:59,475 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:03:59,475 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:03:59,481 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:03:59" (1/1) ... [2023-11-29 03:03:59,497 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:03:59" (1/1) ... [2023-11-29 03:03:59,561 INFO L138 Inliner]: procedures = 26, calls = 58, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 424 [2023-11-29 03:03:59,562 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:03:59,562 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:03:59,562 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:03:59,562 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:03:59,574 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:03:59" (1/1) ... [2023-11-29 03:03:59,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:03:59" (1/1) ... [2023-11-29 03:03:59,584 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:03:59" (1/1) ... [2023-11-29 03:03:59,634 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 03:03:59,634 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:03:59" (1/1) ... [2023-11-29 03:03:59,634 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:03:59" (1/1) ... [2023-11-29 03:03:59,689 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:03:59" (1/1) ... [2023-11-29 03:03:59,694 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:03:59" (1/1) ... [2023-11-29 03:03:59,699 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:03:59" (1/1) ... [2023-11-29 03:03:59,706 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:03:59" (1/1) ... [2023-11-29 03:03:59,714 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:03:59,715 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:03:59,715 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:03:59,716 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:03:59,716 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:03:59" (1/1) ... [2023-11-29 03:03:59,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:03:59,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:03:59,743 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:03:59,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:03:59,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:03:59,776 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 03:03:59,777 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 03:03:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:03:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:03:59,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:03:59,892 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:03:59,894 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:04:00,503 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:04:00,549 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:04:00,549 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 03:04:00,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:04:00 BoogieIcfgContainer [2023-11-29 03:04:00,550 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:04:00,551 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:04:00,552 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:04:00,554 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:04:00,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:03:59" (1/3) ... [2023-11-29 03:04:00,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e45147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:04:00, skipping insertion in model container [2023-11-29 03:04:00,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:03:59" (2/3) ... [2023-11-29 03:04:00,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e45147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:04:00, skipping insertion in model container [2023-11-29 03:04:00,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:04:00" (3/3) ... [2023-11-29 03:04:00,557 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-11.i [2023-11-29 03:04:00,571 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:04:00,571 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:04:00,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:04:00,622 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;@450c3fab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:04:00,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 03:04:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 113 states have (on average 1.5398230088495575) internal successors, (174), 114 states have internal predecessors, (174), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-29 03:04:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-29 03:04:00,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:04:00,648 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:00,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:04:00,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:04:00,653 INFO L85 PathProgramCache]: Analyzing trace with hash -755834609, now seen corresponding path program 1 times [2023-11-29 03:04:00,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:04:00,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204154909] [2023-11-29 03:04:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:00,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:04:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:04:00,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:04:00,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204154909] [2023-11-29 03:04:00,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 03:04:00,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619971864] [2023-11-29 03:04:00,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:00,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:00,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:04:00,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:04:00,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:04:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:04:01,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 03:04:01,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:04:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2023-11-29 03:04:01,325 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:04:01,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619971864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:04:01,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:04:01,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:04:01,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923558401] [2023-11-29 03:04:01,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:04:01,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 03:04:01,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:04:01,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 03:04:01,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:04:01,366 INFO L87 Difference]: Start difference. First operand has 161 states, 113 states have (on average 1.5398230088495575) internal successors, (174), 114 states have internal predecessors, (174), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) Second operand has 2 states, 2 states have (on average 44.5) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) [2023-11-29 03:04:01,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:04:01,422 INFO L93 Difference]: Finished difference Result 319 states and 571 transitions. [2023-11-29 03:04:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 03:04:01,425 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 44.5) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) Word has length 309 [2023-11-29 03:04:01,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:04:01,435 INFO L225 Difference]: With dead ends: 319 [2023-11-29 03:04:01,436 INFO L226 Difference]: Without dead ends: 159 [2023-11-29 03:04:01,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 308 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 03:04:01,445 INFO L413 NwaCegarLoop]: 252 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, 252 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 03:04:01,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 252 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:04:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-29 03:04:01,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2023-11-29 03:04:01,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-29 03:04:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 255 transitions. [2023-11-29 03:04:01,507 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 255 transitions. Word has length 309 [2023-11-29 03:04:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:04:01,507 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 255 transitions. [2023-11-29 03:04:01,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 44.5) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) [2023-11-29 03:04:01,508 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 255 transitions. [2023-11-29 03:04:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-29 03:04:01,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:04:01,516 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:01,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:04:01,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:01,723 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:04:01,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:04:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2019433711, now seen corresponding path program 1 times [2023-11-29 03:04:01,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:04:01,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753273698] [2023-11-29 03:04:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:01,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:04:01,839 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:04:01,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293369206] [2023-11-29 03:04:01,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:01,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:01,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:04:01,842 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:04:01,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:04:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:04:02,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 03:04:02,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:04:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-29 03:04:02,635 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:04:02,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:04:02,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753273698] [2023-11-29 03:04:02,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:04:02,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293369206] [2023-11-29 03:04:02,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293369206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:04:02,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:04:02,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:04:02,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188824684] [2023-11-29 03:04:02,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:04:02,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:04:02,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:04:02,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:04:02,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:04:02,641 INFO L87 Difference]: Start difference. First operand 159 states and 255 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:04:02,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:04:02,907 INFO L93 Difference]: Finished difference Result 476 states and 764 transitions. [2023-11-29 03:04:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:04:02,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 309 [2023-11-29 03:04:02,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:04:02,912 INFO L225 Difference]: With dead ends: 476 [2023-11-29 03:04:02,913 INFO L226 Difference]: Without dead ends: 318 [2023-11-29 03:04:02,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 306 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 03:04:02,916 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 193 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:04:02,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 748 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:04:02,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-11-29 03:04:02,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 311. [2023-11-29 03:04:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 218 states have (on average 1.4724770642201834) internal successors, (321), 218 states have internal predecessors, (321), 90 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-29 03:04:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 501 transitions. [2023-11-29 03:04:02,976 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 501 transitions. Word has length 309 [2023-11-29 03:04:02,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:04:02,978 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 501 transitions. [2023-11-29 03:04:02,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:04:02,979 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 501 transitions. [2023-11-29 03:04:02,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-29 03:04:02,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:04:02,985 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:02,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 03:04:03,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 03:04:03,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:04:03,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:04:03,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1575533037, now seen corresponding path program 1 times [2023-11-29 03:04:03,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:04:03,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603382466] [2023-11-29 03:04:03,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:03,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:04:03,254 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:04:03,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682334164] [2023-11-29 03:04:03,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:03,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:03,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:04:03,256 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:04:03,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:04:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:04:03,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 03:04:03,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:04:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-29 03:04:04,084 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:04:04,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:04:04,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603382466] [2023-11-29 03:04:04,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:04:04,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682334164] [2023-11-29 03:04:04,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682334164] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:04:04,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:04:04,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:04:04,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16084086] [2023-11-29 03:04:04,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:04:04,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:04:04,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:04:04,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:04:04,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:04:04,087 INFO L87 Difference]: Start difference. First operand 311 states and 501 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:04:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:04:04,473 INFO L93 Difference]: Finished difference Result 884 states and 1425 transitions. [2023-11-29 03:04:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:04:04,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 309 [2023-11-29 03:04:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:04:04,483 INFO L225 Difference]: With dead ends: 884 [2023-11-29 03:04:04,483 INFO L226 Difference]: Without dead ends: 708 [2023-11-29 03:04:04,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 306 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 03:04:04,486 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 385 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:04:04,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 576 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:04:04,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2023-11-29 03:04:04,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 503. [2023-11-29 03:04:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 364 states have (on average 1.4862637362637363) internal successors, (541), 364 states have internal predecessors, (541), 135 states have call successors, (135), 3 states have call predecessors, (135), 3 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-29 03:04:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 811 transitions. [2023-11-29 03:04:04,558 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 811 transitions. Word has length 309 [2023-11-29 03:04:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:04:04,559 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 811 transitions. [2023-11-29 03:04:04,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:04:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 811 transitions. [2023-11-29 03:04:04,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-29 03:04:04,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:04:04,565 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:04,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 03:04:04,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 03:04:04,766 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:04:04,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:04:04,767 INFO L85 PathProgramCache]: Analyzing trace with hash 333867525, now seen corresponding path program 1 times [2023-11-29 03:04:04,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:04:04,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865569159] [2023-11-29 03:04:04,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:04,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:04:04,825 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:04:04,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860718787] [2023-11-29 03:04:04,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:04,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:04,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:04:04,827 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:04:04,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:04:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:04:05,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 03:04:05,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:04:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-29 03:04:05,173 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:04:05,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:04:05,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865569159] [2023-11-29 03:04:05,174 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:04:05,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860718787] [2023-11-29 03:04:05,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860718787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:04:05,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:04:05,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:04:05,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77239896] [2023-11-29 03:04:05,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:04:05,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:04:05,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:04:05,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:04:05,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:04:05,177 INFO L87 Difference]: Start difference. First operand 503 states and 811 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:04:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:04:05,307 INFO L93 Difference]: Finished difference Result 1109 states and 1788 transitions. [2023-11-29 03:04:05,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:04:05,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 309 [2023-11-29 03:04:05,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:04:05,316 INFO L225 Difference]: With dead ends: 1109 [2023-11-29 03:04:05,316 INFO L226 Difference]: Without dead ends: 715 [2023-11-29 03:04:05,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 307 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 03:04:05,319 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 212 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:04:05,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 607 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:04:05,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2023-11-29 03:04:05,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 572. [2023-11-29 03:04:05,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 433 states have (on average 1.4711316397228638) internal successors, (637), 433 states have internal predecessors, (637), 135 states have call successors, (135), 3 states have call predecessors, (135), 3 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-29 03:04:05,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 907 transitions. [2023-11-29 03:04:05,380 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 907 transitions. Word has length 309 [2023-11-29 03:04:05,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:04:05,382 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 907 transitions. [2023-11-29 03:04:05,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:04:05,382 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 907 transitions. [2023-11-29 03:04:05,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-29 03:04:05,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:04:05,388 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:05,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:04:05,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:05,589 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:04:05,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:04:05,589 INFO L85 PathProgramCache]: Analyzing trace with hash -972891466, now seen corresponding path program 1 times [2023-11-29 03:04:05,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:04:05,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430117482] [2023-11-29 03:04:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:05,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:04:05,639 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:04:05,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705957881] [2023-11-29 03:04:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:05,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:05,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:04:05,641 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:04:05,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 03:04:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:04:05,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 03:04:05,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:04:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 384 proven. 126 refuted. 0 times theorem prover too weak. 3450 trivial. 0 not checked. [2023-11-29 03:04:06,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:04:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 6 proven. 126 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:04:06,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:04:06,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430117482] [2023-11-29 03:04:06,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:04:06,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705957881] [2023-11-29 03:04:06,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705957881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:04:06,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:04:06,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 03:04:06,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693859554] [2023-11-29 03:04:06,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:04:06,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 03:04:06,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:04:06,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 03:04:06,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:04:06,579 INFO L87 Difference]: Start difference. First operand 572 states and 907 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2023-11-29 03:04:06,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:04:06,917 INFO L93 Difference]: Finished difference Result 1054 states and 1654 transitions. [2023-11-29 03:04:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 03:04:06,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) Word has length 310 [2023-11-29 03:04:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:04:06,924 INFO L225 Difference]: With dead ends: 1054 [2023-11-29 03:04:06,924 INFO L226 Difference]: Without dead ends: 596 [2023-11-29 03:04:06,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:04:06,926 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 231 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:04:06,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 487 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:04:06,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-11-29 03:04:06,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 584. [2023-11-29 03:04:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 442 states have (on average 1.4389140271493213) internal successors, (636), 442 states have internal predecessors, (636), 135 states have call successors, (135), 6 states have call predecessors, (135), 6 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-29 03:04:06,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 906 transitions. [2023-11-29 03:04:06,987 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 906 transitions. Word has length 310 [2023-11-29 03:04:06,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:04:06,988 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 906 transitions. [2023-11-29 03:04:06,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2023-11-29 03:04:06,989 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 906 transitions. [2023-11-29 03:04:06,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2023-11-29 03:04:06,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:04:06,995 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:07,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 03:04:07,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:07,196 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:04:07,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:04:07,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1667536862, now seen corresponding path program 1 times [2023-11-29 03:04:07,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:04:07,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463850411] [2023-11-29 03:04:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:07,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:04:07,244 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:04:07,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212832802] [2023-11-29 03:04:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:07,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:07,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:04:07,246 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:04:07,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 03:04:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:04:07,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:04:07,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:04:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1154 proven. 21 refuted. 0 times theorem prover too weak. 2785 trivial. 0 not checked. [2023-11-29 03:04:07,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:04:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 111 proven. 21 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:04:07,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:04:07,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463850411] [2023-11-29 03:04:07,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:04:07,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212832802] [2023-11-29 03:04:07,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212832802] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:04:07,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:04:07,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 03:04:07,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510764022] [2023-11-29 03:04:07,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:04:07,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 03:04:07,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:04:07,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 03:04:07,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:04:07,839 INFO L87 Difference]: Start difference. First operand 584 states and 906 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 2 states have call successors, (52), 2 states have call predecessors, (52), 4 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2023-11-29 03:04:08,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:04:08,792 INFO L93 Difference]: Finished difference Result 1218 states and 1871 transitions. [2023-11-29 03:04:08,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 03:04:08,794 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 2 states have call successors, (52), 2 states have call predecessors, (52), 4 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 312 [2023-11-29 03:04:08,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:04:08,800 INFO L225 Difference]: With dead ends: 1218 [2023-11-29 03:04:08,800 INFO L226 Difference]: Without dead ends: 732 [2023-11-29 03:04:08,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 615 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-29 03:04:08,802 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 568 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 03:04:08,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 1098 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 03:04:08,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2023-11-29 03:04:08,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 576. [2023-11-29 03:04:08,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 431 states have (on average 1.3897911832946637) internal successors, (599), 431 states have internal predecessors, (599), 135 states have call successors, (135), 9 states have call predecessors, (135), 9 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-29 03:04:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 869 transitions. [2023-11-29 03:04:08,877 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 869 transitions. Word has length 312 [2023-11-29 03:04:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:04:08,878 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 869 transitions. [2023-11-29 03:04:08,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 2 states have call successors, (52), 2 states have call predecessors, (52), 4 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2023-11-29 03:04:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 869 transitions. [2023-11-29 03:04:08,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-11-29 03:04:08,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:04:08,880 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:08,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 03:04:09,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:09,081 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:04:09,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:04:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash -364507655, now seen corresponding path program 1 times [2023-11-29 03:04:09,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:04:09,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701147682] [2023-11-29 03:04:09,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:09,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:04:09,129 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:04:09,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472398681] [2023-11-29 03:04:09,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:09,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:09,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:04:09,131 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:04:09,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:04:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:04:09,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 03:04:09,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:04:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2088 proven. 231 refuted. 0 times theorem prover too weak. 1641 trivial. 0 not checked. [2023-11-29 03:04:11,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:04:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 54 proven. 78 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:04:11,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:04:11,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701147682] [2023-11-29 03:04:11,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:04:11,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472398681] [2023-11-29 03:04:11,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472398681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:04:11,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:04:11,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 26 [2023-11-29 03:04:11,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450966018] [2023-11-29 03:04:11,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:04:11,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 03:04:11,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:04:11,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 03:04:11,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2023-11-29 03:04:11,891 INFO L87 Difference]: Start difference. First operand 576 states and 869 transitions. Second operand has 26 states, 26 states have (on average 7.269230769230769) internal successors, (189), 25 states have internal predecessors, (189), 6 states have call successors, (90), 5 states have call predecessors, (90), 8 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) [2023-11-29 03:04:18,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:04:18,710 INFO L93 Difference]: Finished difference Result 3373 states and 4959 transitions. [2023-11-29 03:04:18,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-29 03:04:18,711 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.269230769230769) internal successors, (189), 25 states have internal predecessors, (189), 6 states have call successors, (90), 5 states have call predecessors, (90), 8 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) Word has length 313 [2023-11-29 03:04:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:04:18,728 INFO L225 Difference]: With dead ends: 3373 [2023-11-29 03:04:18,728 INFO L226 Difference]: Without dead ends: 2992 [2023-11-29 03:04:18,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2703 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1632, Invalid=5850, Unknown=0, NotChecked=0, Total=7482 [2023-11-29 03:04:18,733 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 4021 mSDsluCounter, 4336 mSDsCounter, 0 mSdLazyCounter, 4787 mSolverCounterSat, 1006 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4027 SdHoareTripleChecker+Valid, 4717 SdHoareTripleChecker+Invalid, 5793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1006 IncrementalHoareTripleChecker+Valid, 4787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:04:18,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4027 Valid, 4717 Invalid, 5793 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1006 Valid, 4787 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-29 03:04:18,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2023-11-29 03:04:18,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 1777. [2023-11-29 03:04:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1395 states have (on average 1.3813620071684587) internal successors, (1927), 1407 states have internal predecessors, (1927), 337 states have call successors, (337), 44 states have call predecessors, (337), 44 states have return successors, (337), 325 states have call predecessors, (337), 337 states have call successors, (337) [2023-11-29 03:04:18,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2601 transitions. [2023-11-29 03:04:18,898 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2601 transitions. Word has length 313 [2023-11-29 03:04:18,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:04:18,899 INFO L495 AbstractCegarLoop]: Abstraction has 1777 states and 2601 transitions. [2023-11-29 03:04:18,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.269230769230769) internal successors, (189), 25 states have internal predecessors, (189), 6 states have call successors, (90), 5 states have call predecessors, (90), 8 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) [2023-11-29 03:04:18,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2601 transitions. [2023-11-29 03:04:18,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-11-29 03:04:18,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:04:18,903 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:18,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 03:04:19,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:19,104 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:04:19,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:04:19,104 INFO L85 PathProgramCache]: Analyzing trace with hash 152764021, now seen corresponding path program 1 times [2023-11-29 03:04:19,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:04:19,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035136031] [2023-11-29 03:04:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:19,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:04:19,151 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:04:19,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723372019] [2023-11-29 03:04:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:19,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:19,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:04:19,153 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:04:19,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 03:04:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:04:19,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 03:04:19,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:04:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-29 03:04:19,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:04:19,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:04:19,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035136031] [2023-11-29 03:04:19,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:04:19,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723372019] [2023-11-29 03:04:19,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723372019] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:04:19,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:04:19,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:04:19,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568143394] [2023-11-29 03:04:19,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:04:19,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:04:19,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:04:19,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:04:19,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:04:19,492 INFO L87 Difference]: Start difference. First operand 1777 states and 2601 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:04:19,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:04:19,677 INFO L93 Difference]: Finished difference Result 2745 states and 4021 transitions. [2023-11-29 03:04:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:04:19,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 313 [2023-11-29 03:04:19,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:04:19,690 INFO L225 Difference]: With dead ends: 2745 [2023-11-29 03:04:19,690 INFO L226 Difference]: Without dead ends: 1494 [2023-11-29 03:04:19,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 310 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 03:04:19,694 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 15 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:04:19,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 713 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:04:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2023-11-29 03:04:19,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1494. [2023-11-29 03:04:19,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1194 states have (on average 1.382747068676717) internal successors, (1651), 1202 states have internal predecessors, (1651), 265 states have call successors, (265), 34 states have call predecessors, (265), 34 states have return successors, (265), 257 states have call predecessors, (265), 265 states have call successors, (265) [2023-11-29 03:04:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 2181 transitions. [2023-11-29 03:04:19,867 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 2181 transitions. Word has length 313 [2023-11-29 03:04:19,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:04:19,868 INFO L495 AbstractCegarLoop]: Abstraction has 1494 states and 2181 transitions. [2023-11-29 03:04:19,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:04:19,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 2181 transitions. [2023-11-29 03:04:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-11-29 03:04:19,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:04:19,872 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:19,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 03:04:20,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:20,073 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:04:20,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:04:20,074 INFO L85 PathProgramCache]: Analyzing trace with hash 451767178, now seen corresponding path program 1 times [2023-11-29 03:04:20,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:04:20,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712135292] [2023-11-29 03:04:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:20,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:04:20,124 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:04:20,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924262524] [2023-11-29 03:04:20,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:20,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:20,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:04:20,126 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:04:20,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 03:04:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:04:20,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:04:20,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:04:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-29 03:04:20,397 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:04:20,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:04:20,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712135292] [2023-11-29 03:04:20,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:04:20,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924262524] [2023-11-29 03:04:20,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924262524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:04:20,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:04:20,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:04:20,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318097995] [2023-11-29 03:04:20,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:04:20,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:04:20,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:04:20,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:04:20,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:04:20,400 INFO L87 Difference]: Start difference. First operand 1494 states and 2181 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:04:20,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:04:20,553 INFO L93 Difference]: Finished difference Result 2579 states and 3759 transitions. [2023-11-29 03:04:20,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:04:20,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 314 [2023-11-29 03:04:20,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:04:20,561 INFO L225 Difference]: With dead ends: 2579 [2023-11-29 03:04:20,562 INFO L226 Difference]: Without dead ends: 1494 [2023-11-29 03:04:20,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 312 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 03:04:20,565 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 2 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:04:20,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 443 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:04:20,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2023-11-29 03:04:20,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1494. [2023-11-29 03:04:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1194 states have (on average 1.3726968174204355) internal successors, (1639), 1202 states have internal predecessors, (1639), 265 states have call successors, (265), 34 states have call predecessors, (265), 34 states have return successors, (265), 257 states have call predecessors, (265), 265 states have call successors, (265) [2023-11-29 03:04:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 2169 transitions. [2023-11-29 03:04:20,698 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 2169 transitions. Word has length 314 [2023-11-29 03:04:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:04:20,698 INFO L495 AbstractCegarLoop]: Abstraction has 1494 states and 2169 transitions. [2023-11-29 03:04:20,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:04:20,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 2169 transitions. [2023-11-29 03:04:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-11-29 03:04:20,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:04:20,702 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:20,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 03:04:20,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 03:04:20,903 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:04:20,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:04:20,904 INFO L85 PathProgramCache]: Analyzing trace with hash 709932616, now seen corresponding path program 1 times [2023-11-29 03:04:20,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:04:20,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291414101] [2023-11-29 03:04:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:20,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:04:20,950 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:04:20,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101762039] [2023-11-29 03:04:20,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:20,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:20,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:04:20,952 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:04:20,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 03:04:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:04:21,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 03:04:21,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:04:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 150 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2023-11-29 03:04:21,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:04:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-29 03:04:22,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:04:22,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291414101] [2023-11-29 03:04:22,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:04:22,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101762039] [2023-11-29 03:04:22,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101762039] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:04:22,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:04:22,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-11-29 03:04:22,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770803821] [2023-11-29 03:04:22,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:04:22,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:04:22,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:04:22,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:04:22,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:04:22,076 INFO L87 Difference]: Start difference. First operand 1494 states and 2169 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:04:22,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:04:22,496 INFO L93 Difference]: Finished difference Result 2816 states and 4086 transitions. [2023-11-29 03:04:22,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:04:22,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 314 [2023-11-29 03:04:22,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:04:22,505 INFO L225 Difference]: With dead ends: 2816 [2023-11-29 03:04:22,505 INFO L226 Difference]: Without dead ends: 1494 [2023-11-29 03:04:22,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-29 03:04:22,509 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 307 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:04:22,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 662 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:04:22,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2023-11-29 03:04:22,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1494. [2023-11-29 03:04:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1194 states have (on average 1.3601340033500837) internal successors, (1624), 1202 states have internal predecessors, (1624), 265 states have call successors, (265), 34 states have call predecessors, (265), 34 states have return successors, (265), 257 states have call predecessors, (265), 265 states have call successors, (265) [2023-11-29 03:04:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 2154 transitions. [2023-11-29 03:04:22,668 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 2154 transitions. Word has length 314 [2023-11-29 03:04:22,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:04:22,669 INFO L495 AbstractCegarLoop]: Abstraction has 1494 states and 2154 transitions. [2023-11-29 03:04:22,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:04:22,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 2154 transitions. [2023-11-29 03:04:22,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-11-29 03:04:22,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:04:22,674 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:22,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 03:04:22,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 03:04:22,875 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:04:22,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:04:22,875 INFO L85 PathProgramCache]: Analyzing trace with hash -183553722, now seen corresponding path program 1 times [2023-11-29 03:04:22,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:04:22,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61935949] [2023-11-29 03:04:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:22,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:04:22,932 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:04:22,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280341997] [2023-11-29 03:04:22,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:22,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:22,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:04:22,934 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:04:22,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 03:04:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:04:23,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 03:04:23,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:04:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2057 proven. 162 refuted. 0 times theorem prover too weak. 1741 trivial. 0 not checked. [2023-11-29 03:04:24,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:04:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 54 proven. 78 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:04:24,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:04:24,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61935949] [2023-11-29 03:04:24,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:04:24,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280341997] [2023-11-29 03:04:24,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280341997] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:04:24,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:04:24,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-11-29 03:04:24,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931236966] [2023-11-29 03:04:24,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:04:24,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 03:04:24,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:04:24,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 03:04:24,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-11-29 03:04:24,830 INFO L87 Difference]: Start difference. First operand 1494 states and 2154 transitions. Second operand has 22 states, 22 states have (on average 7.045454545454546) internal successors, (155), 22 states have internal predecessors, (155), 4 states have call successors, (74), 3 states have call predecessors, (74), 6 states have return successors, (75), 4 states have call predecessors, (75), 4 states have call successors, (75) [2023-11-29 03:04:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:04:36,546 INFO L93 Difference]: Finished difference Result 13342 states and 18773 transitions. [2023-11-29 03:04:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2023-11-29 03:04:36,547 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.045454545454546) internal successors, (155), 22 states have internal predecessors, (155), 4 states have call successors, (74), 3 states have call predecessors, (74), 6 states have return successors, (75), 4 states have call predecessors, (75), 4 states have call successors, (75) Word has length 314 [2023-11-29 03:04:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:04:36,595 INFO L225 Difference]: With dead ends: 13342 [2023-11-29 03:04:36,595 INFO L226 Difference]: Without dead ends: 12131 [2023-11-29 03:04:36,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 813 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15206 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=6591, Invalid=29319, Unknown=0, NotChecked=0, Total=35910 [2023-11-29 03:04:36,610 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 5482 mSDsluCounter, 2594 mSDsCounter, 0 mSdLazyCounter, 4270 mSolverCounterSat, 1652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5510 SdHoareTripleChecker+Valid, 2830 SdHoareTripleChecker+Invalid, 5922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1652 IncrementalHoareTripleChecker+Valid, 4270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:04:36,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5510 Valid, 2830 Invalid, 5922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1652 Valid, 4270 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-29 03:04:36,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12131 states. [2023-11-29 03:04:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12131 to 1656. [2023-11-29 03:04:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1394 states have (on average 1.3672883787661405) internal successors, (1906), 1394 states have internal predecessors, (1906), 225 states have call successors, (225), 36 states have call predecessors, (225), 36 states have return successors, (225), 225 states have call predecessors, (225), 225 states have call successors, (225) [2023-11-29 03:04:37,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2356 transitions. [2023-11-29 03:04:37,018 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2356 transitions. Word has length 314 [2023-11-29 03:04:37,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:04:37,019 INFO L495 AbstractCegarLoop]: Abstraction has 1656 states and 2356 transitions. [2023-11-29 03:04:37,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.045454545454546) internal successors, (155), 22 states have internal predecessors, (155), 4 states have call successors, (74), 3 states have call predecessors, (74), 6 states have return successors, (75), 4 states have call predecessors, (75), 4 states have call successors, (75) [2023-11-29 03:04:37,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2356 transitions. [2023-11-29 03:04:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-11-29 03:04:37,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:04:37,021 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:37,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 03:04:37,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 03:04:37,222 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:04:37,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:04:37,222 INFO L85 PathProgramCache]: Analyzing trace with hash -885153596, now seen corresponding path program 1 times [2023-11-29 03:04:37,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:04:37,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549330115] [2023-11-29 03:04:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:37,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:04:37,262 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:04:37,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627981512] [2023-11-29 03:04:37,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:37,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:37,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:04:37,263 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:04:37,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 03:04:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:04:37,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 03:04:37,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:04:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1814 proven. 87 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-11-29 03:04:38,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:04:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-29 03:04:38,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:04:38,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549330115] [2023-11-29 03:04:38,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:04:38,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627981512] [2023-11-29 03:04:38,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627981512] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:04:38,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:04:38,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2023-11-29 03:04:38,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232045554] [2023-11-29 03:04:38,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:04:38,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 03:04:38,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:04:38,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 03:04:38,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-11-29 03:04:38,756 INFO L87 Difference]: Start difference. First operand 1656 states and 2356 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2023-11-29 03:04:41,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:04:41,338 INFO L93 Difference]: Finished difference Result 8098 states and 11580 transitions. [2023-11-29 03:04:41,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 03:04:41,338 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 314 [2023-11-29 03:04:41,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:04:41,365 INFO L225 Difference]: With dead ends: 8098 [2023-11-29 03:04:41,365 INFO L226 Difference]: Without dead ends: 6701 [2023-11-29 03:04:41,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 615 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 03:04:41,370 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 1983 mSDsluCounter, 2375 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1983 SdHoareTripleChecker+Valid, 2815 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:04:41,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1983 Valid, 2815 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 03:04:41,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6701 states. [2023-11-29 03:04:41,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6701 to 2429. [2023-11-29 03:04:41,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 2063 states have (on average 1.3669413475521086) internal successors, (2820), 2063 states have internal predecessors, (2820), 315 states have call successors, (315), 50 states have call predecessors, (315), 50 states have return successors, (315), 315 states have call predecessors, (315), 315 states have call successors, (315) [2023-11-29 03:04:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 3450 transitions. [2023-11-29 03:04:41,836 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 3450 transitions. Word has length 314 [2023-11-29 03:04:41,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:04:41,836 INFO L495 AbstractCegarLoop]: Abstraction has 2429 states and 3450 transitions. [2023-11-29 03:04:41,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2023-11-29 03:04:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 3450 transitions. [2023-11-29 03:04:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-11-29 03:04:41,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:04:41,839 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:41,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 03:04:42,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 03:04:42,039 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:04:42,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:04:42,040 INFO L85 PathProgramCache]: Analyzing trace with hash -441252922, now seen corresponding path program 1 times [2023-11-29 03:04:42,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:04:42,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205439479] [2023-11-29 03:04:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:42,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:04:42,080 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:04:42,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624434880] [2023-11-29 03:04:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:42,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:42,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:04:42,082 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:04:42,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 03:04:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:04:42,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 03:04:42,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:04:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1868 proven. 84 refuted. 0 times theorem prover too weak. 2008 trivial. 0 not checked. [2023-11-29 03:04:43,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:04:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 48 proven. 84 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:04:43,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:04:43,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205439479] [2023-11-29 03:04:43,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:04:43,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624434880] [2023-11-29 03:04:43,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624434880] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:04:43,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:04:43,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-11-29 03:04:43,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218271019] [2023-11-29 03:04:43,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:04:43,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 03:04:43,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:04:43,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 03:04:43,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-11-29 03:04:43,828 INFO L87 Difference]: Start difference. First operand 2429 states and 3450 transitions. Second operand has 20 states, 20 states have (on average 8.15) internal successors, (163), 20 states have internal predecessors, (163), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-29 03:04:56,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:04:56,501 INFO L93 Difference]: Finished difference Result 12428 states and 17574 transitions. [2023-11-29 03:04:56,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-11-29 03:04:56,502 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 8.15) internal successors, (163), 20 states have internal predecessors, (163), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) Word has length 314 [2023-11-29 03:04:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:04:56,522 INFO L225 Difference]: With dead ends: 12428 [2023-11-29 03:04:56,522 INFO L226 Difference]: Without dead ends: 10452 [2023-11-29 03:04:56,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 632 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4342 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2254, Invalid=8876, Unknown=0, NotChecked=0, Total=11130 [2023-11-29 03:04:56,529 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 4228 mSDsluCounter, 4522 mSDsCounter, 0 mSdLazyCounter, 5149 mSolverCounterSat, 1660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4289 SdHoareTripleChecker+Valid, 5096 SdHoareTripleChecker+Invalid, 6809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1660 IncrementalHoareTripleChecker+Valid, 5149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-11-29 03:04:56,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4289 Valid, 5096 Invalid, 6809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1660 Valid, 5149 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2023-11-29 03:04:56,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10452 states. [2023-11-29 03:04:57,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10452 to 3384. [2023-11-29 03:04:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3384 states, 2805 states have (on average 1.3532976827094474) internal successors, (3796), 2805 states have internal predecessors, (3796), 495 states have call successors, (495), 83 states have call predecessors, (495), 83 states have return successors, (495), 495 states have call predecessors, (495), 495 states have call successors, (495) [2023-11-29 03:04:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3384 states to 3384 states and 4786 transitions. [2023-11-29 03:04:57,328 INFO L78 Accepts]: Start accepts. Automaton has 3384 states and 4786 transitions. Word has length 314 [2023-11-29 03:04:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:04:57,328 INFO L495 AbstractCegarLoop]: Abstraction has 3384 states and 4786 transitions. [2023-11-29 03:04:57,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.15) internal successors, (163), 20 states have internal predecessors, (163), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-29 03:04:57,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3384 states and 4786 transitions. [2023-11-29 03:04:57,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-11-29 03:04:57,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:04:57,331 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:57,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 03:04:57,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:57,532 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:04:57,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:04:57,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1297117984, now seen corresponding path program 1 times [2023-11-29 03:04:57,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:04:57,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129054002] [2023-11-29 03:04:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:57,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:04:57,575 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:04:57,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416395535] [2023-11-29 03:04:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:04:57,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:04:57,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:04:57,577 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:04:57,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 03:04:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:04:58,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 03:04:58,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:04:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-29 03:04:58,828 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:04:58,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:04:58,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129054002] [2023-11-29 03:04:58,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:04:58,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416395535] [2023-11-29 03:04:58,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416395535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:04:58,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:04:58,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 03:04:58,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250426023] [2023-11-29 03:04:58,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:04:58,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 03:04:58,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:04:58,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 03:04:58,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-29 03:04:58,831 INFO L87 Difference]: Start difference. First operand 3384 states and 4786 transitions. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 9 states have internal predecessors, (93), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:05:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:05:00,874 INFO L93 Difference]: Finished difference Result 8780 states and 12385 transitions. [2023-11-29 03:05:00,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 03:05:00,875 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 9 states have internal predecessors, (93), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 315 [2023-11-29 03:05:00,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:05:00,885 INFO L225 Difference]: With dead ends: 8780 [2023-11-29 03:05:00,885 INFO L226 Difference]: Without dead ends: 5891 [2023-11-29 03:05:00,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2023-11-29 03:05:00,891 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 1117 mSDsluCounter, 2038 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 2390 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:05:00,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1117 Valid, 2390 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 03:05:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5891 states. [2023-11-29 03:05:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5891 to 5249. [2023-11-29 03:05:01,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5249 states, 4250 states have (on average 1.3275294117647058) internal successors, (5642), 4250 states have internal predecessors, (5642), 855 states have call successors, (855), 143 states have call predecessors, (855), 143 states have return successors, (855), 855 states have call predecessors, (855), 855 states have call successors, (855) [2023-11-29 03:05:01,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5249 states to 5249 states and 7352 transitions. [2023-11-29 03:05:01,972 INFO L78 Accepts]: Start accepts. Automaton has 5249 states and 7352 transitions. Word has length 315 [2023-11-29 03:05:01,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:05:01,972 INFO L495 AbstractCegarLoop]: Abstraction has 5249 states and 7352 transitions. [2023-11-29 03:05:01,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 9 states have internal predecessors, (93), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:05:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 5249 states and 7352 transitions. [2023-11-29 03:05:01,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-11-29 03:05:01,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:05:01,978 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:05:01,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 03:05:02,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 03:05:02,179 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:05:02,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:05:02,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1626042014, now seen corresponding path program 1 times [2023-11-29 03:05:02,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:05:02,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3118694] [2023-11-29 03:05:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:05:02,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:05:02,217 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:05:02,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400793735] [2023-11-29 03:05:02,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:05:02,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:05:02,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:05:02,219 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:05:02,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 03:05:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:05:02,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 03:05:02,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:05:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2088 proven. 231 refuted. 0 times theorem prover too weak. 1641 trivial. 0 not checked. [2023-11-29 03:05:05,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:05:10,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:05:10,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3118694] [2023-11-29 03:05:10,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:05:10,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400793735] [2023-11-29 03:05:10,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400793735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:05:10,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:05:10,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-29 03:05:10,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860728372] [2023-11-29 03:05:10,881 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 03:05:10,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 03:05:10,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:05:10,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 03:05:10,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2023-11-29 03:05:10,884 INFO L87 Difference]: Start difference. First operand 5249 states and 7352 transitions. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 16 states have internal predecessors, (108), 4 states have call successors, (45), 4 states have call predecessors, (45), 6 states have return successors, (45), 4 states have call predecessors, (45), 4 states have call successors, (45) [2023-11-29 03:05:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:05:15,268 INFO L93 Difference]: Finished difference Result 10023 states and 14021 transitions. [2023-11-29 03:05:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 03:05:15,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 16 states have internal predecessors, (108), 4 states have call successors, (45), 4 states have call predecessors, (45), 6 states have return successors, (45), 4 states have call predecessors, (45), 4 states have call successors, (45) Word has length 315 [2023-11-29 03:05:15,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:05:15,277 INFO L225 Difference]: With dead ends: 10023 [2023-11-29 03:05:15,277 INFO L226 Difference]: Without dead ends: 5867 [2023-11-29 03:05:15,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=643, Invalid=2437, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 03:05:15,284 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 1329 mSDsluCounter, 2427 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 2798 SdHoareTripleChecker+Invalid, 2161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:05:15,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1329 Valid, 2798 Invalid, 2161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1977 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 03:05:15,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5867 states. [2023-11-29 03:05:16,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5867 to 5287. [2023-11-29 03:05:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5287 states, 4288 states have (on average 1.327891791044776) internal successors, (5694), 4288 states have internal predecessors, (5694), 855 states have call successors, (855), 143 states have call predecessors, (855), 143 states have return successors, (855), 855 states have call predecessors, (855), 855 states have call successors, (855) [2023-11-29 03:05:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5287 states to 5287 states and 7404 transitions. [2023-11-29 03:05:16,329 INFO L78 Accepts]: Start accepts. Automaton has 5287 states and 7404 transitions. Word has length 315 [2023-11-29 03:05:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:05:16,330 INFO L495 AbstractCegarLoop]: Abstraction has 5287 states and 7404 transitions. [2023-11-29 03:05:16,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 16 states have internal predecessors, (108), 4 states have call successors, (45), 4 states have call predecessors, (45), 6 states have return successors, (45), 4 states have call predecessors, (45), 4 states have call successors, (45) [2023-11-29 03:05:16,330 INFO L276 IsEmpty]: Start isEmpty. Operand 5287 states and 7404 transitions. [2023-11-29 03:05:16,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-11-29 03:05:16,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:05:16,332 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:05:16,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 03:05:16,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 03:05:16,533 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:05:16,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:05:16,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1523424734, now seen corresponding path program 1 times [2023-11-29 03:05:16,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:05:16,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940847096] [2023-11-29 03:05:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:05:16,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:05:16,572 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:05:16,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768012118] [2023-11-29 03:05:16,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:05:16,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:05:16,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:05:16,574 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:05:16,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 03:05:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:05:17,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 03:05:17,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:05:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1814 proven. 87 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-11-29 03:05:19,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:05:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:05:21,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:05:21,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940847096] [2023-11-29 03:05:21,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:05:21,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768012118] [2023-11-29 03:05:21,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768012118] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:05:21,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:05:21,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 28 [2023-11-29 03:05:21,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670683559] [2023-11-29 03:05:21,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:05:21,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 03:05:21,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:05:21,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 03:05:21,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2023-11-29 03:05:21,280 INFO L87 Difference]: Start difference. First operand 5287 states and 7404 transitions. Second operand has 28 states, 28 states have (on average 5.75) internal successors, (161), 28 states have internal predecessors, (161), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-29 03:06:01,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:06:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:06:47,844 INFO L93 Difference]: Finished difference Result 58389 states and 81266 transitions. [2023-11-29 03:06:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 283 states. [2023-11-29 03:06:47,845 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.75) internal successors, (161), 28 states have internal predecessors, (161), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) Word has length 315 [2023-11-29 03:06:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:06:47,925 INFO L225 Difference]: With dead ends: 58389 [2023-11-29 03:06:47,925 INFO L226 Difference]: Without dead ends: 53704 [2023-11-29 03:06:47,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 965 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45268 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=16450, Invalid=75056, Unknown=0, NotChecked=0, Total=91506 [2023-11-29 03:06:47,949 INFO L413 NwaCegarLoop]: 913 mSDtfsCounter, 15010 mSDsluCounter, 7442 mSDsCounter, 0 mSdLazyCounter, 11939 mSolverCounterSat, 7092 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15087 SdHoareTripleChecker+Valid, 8355 SdHoareTripleChecker+Invalid, 19031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7092 IncrementalHoareTripleChecker+Valid, 11939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:06:47,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15087 Valid, 8355 Invalid, 19031 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7092 Valid, 11939 Invalid, 0 Unknown, 0 Unchecked, 38.6s Time] [2023-11-29 03:06:47,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53704 states. [2023-11-29 03:06:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53704 to 7954. [2023-11-29 03:06:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7954 states, 6062 states have (on average 1.290498185417354) internal successors, (7823), 6062 states have internal predecessors, (7823), 1620 states have call successors, (1620), 271 states have call predecessors, (1620), 271 states have return successors, (1620), 1620 states have call predecessors, (1620), 1620 states have call successors, (1620) [2023-11-29 03:06:52,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7954 states to 7954 states and 11063 transitions. [2023-11-29 03:06:52,092 INFO L78 Accepts]: Start accepts. Automaton has 7954 states and 11063 transitions. Word has length 315 [2023-11-29 03:06:52,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:06:52,093 INFO L495 AbstractCegarLoop]: Abstraction has 7954 states and 11063 transitions. [2023-11-29 03:06:52,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.75) internal successors, (161), 28 states have internal predecessors, (161), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-29 03:06:52,093 INFO L276 IsEmpty]: Start isEmpty. Operand 7954 states and 11063 transitions. [2023-11-29 03:06:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-11-29 03:06:52,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:06:52,097 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:06:52,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 03:06:52,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 03:06:52,298 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:06:52,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:06:52,298 INFO L85 PathProgramCache]: Analyzing trace with hash 849518114, now seen corresponding path program 1 times [2023-11-29 03:06:52,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:06:52,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861726415] [2023-11-29 03:06:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:06:52,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:06:52,338 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:06:52,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603341334] [2023-11-29 03:06:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:06:52,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:06:52,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:06:52,339 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:06:52,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 03:06:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:06:52,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:06:52,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:06:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1374 proven. 27 refuted. 0 times theorem prover too weak. 2559 trivial. 0 not checked. [2023-11-29 03:06:52,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:06:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 105 proven. 27 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:06:52,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:06:52,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861726415] [2023-11-29 03:06:52,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:06:52,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603341334] [2023-11-29 03:06:52,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603341334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:06:52,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:06:52,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 03:06:52,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037342760] [2023-11-29 03:06:52,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:06:52,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 03:06:52,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:06:52,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 03:06:52,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:06:52,920 INFO L87 Difference]: Start difference. First operand 7954 states and 11063 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 2 states have call successors, (54), 2 states have call predecessors, (54), 4 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2023-11-29 03:06:56,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:06:56,825 INFO L93 Difference]: Finished difference Result 12930 states and 17826 transitions. [2023-11-29 03:06:56,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 03:06:56,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 2 states have call successors, (54), 2 states have call predecessors, (54), 4 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) Word has length 315 [2023-11-29 03:06:56,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:06:56,839 INFO L225 Difference]: With dead ends: 12930 [2023-11-29 03:06:56,839 INFO L226 Difference]: Without dead ends: 8314 [2023-11-29 03:06:56,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 622 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:06:56,846 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 306 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:06:56,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 632 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:06:56,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8314 states. [2023-11-29 03:07:00,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8314 to 8098. [2023-11-29 03:07:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8098 states, 6170 states have (on average 1.2818476499189628) internal successors, (7909), 6170 states have internal predecessors, (7909), 1620 states have call successors, (1620), 307 states have call predecessors, (1620), 307 states have return successors, (1620), 1620 states have call predecessors, (1620), 1620 states have call successors, (1620) [2023-11-29 03:07:00,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8098 states to 8098 states and 11149 transitions. [2023-11-29 03:07:00,085 INFO L78 Accepts]: Start accepts. Automaton has 8098 states and 11149 transitions. Word has length 315 [2023-11-29 03:07:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:07:00,086 INFO L495 AbstractCegarLoop]: Abstraction has 8098 states and 11149 transitions. [2023-11-29 03:07:00,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 2 states have call successors, (54), 2 states have call predecessors, (54), 4 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2023-11-29 03:07:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 8098 states and 11149 transitions. [2023-11-29 03:07:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-11-29 03:07:00,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:07:00,092 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:07:00,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 03:07:00,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 03:07:00,293 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:07:00,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:07:00,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2081705005, now seen corresponding path program 1 times [2023-11-29 03:07:00,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:07:00,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653322577] [2023-11-29 03:07:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:07:00,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:07:00,344 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:07:00,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596523199] [2023-11-29 03:07:00,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:07:00,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:07:00,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:07:00,345 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:07:00,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 03:07:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:07:00,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 03:07:00,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:07:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 150 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2023-11-29 03:07:01,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:07:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 108 proven. 153 refuted. 0 times theorem prover too weak. 3699 trivial. 0 not checked. [2023-11-29 03:07:09,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:07:09,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653322577] [2023-11-29 03:07:09,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:07:09,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596523199] [2023-11-29 03:07:09,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596523199] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:07:09,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:07:09,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 03:07:09,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236932164] [2023-11-29 03:07:09,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:07:09,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 03:07:09,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:07:09,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 03:07:09,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-29 03:07:09,442 INFO L87 Difference]: Start difference. First operand 8098 states and 11149 transitions. Second operand has 18 states, 17 states have (on average 9.352941176470589) internal successors, (159), 16 states have internal predecessors, (159), 6 states have call successors, (90), 4 states have call predecessors, (90), 7 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) [2023-11-29 03:07:12,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:07:51,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:08:01,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:08:03,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:08:10,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:08:35,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:08:35,817 INFO L93 Difference]: Finished difference Result 46199 states and 64171 transitions. [2023-11-29 03:08:35,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-29 03:08:35,818 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 9.352941176470589) internal successors, (159), 16 states have internal predecessors, (159), 6 states have call successors, (90), 4 states have call predecessors, (90), 7 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) Word has length 315 [2023-11-29 03:08:35,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:08:35,868 INFO L225 Difference]: With dead ends: 46199 [2023-11-29 03:08:35,868 INFO L226 Difference]: Without dead ends: 38986 [2023-11-29 03:08:35,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=1402, Invalid=3154, Unknown=0, NotChecked=0, Total=4556 [2023-11-29 03:08:35,884 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 3021 mSDsluCounter, 3030 mSDsCounter, 0 mSdLazyCounter, 2742 mSolverCounterSat, 1346 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3061 SdHoareTripleChecker+Valid, 3475 SdHoareTripleChecker+Invalid, 4089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1346 IncrementalHoareTripleChecker+Valid, 2742 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:08:35,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3061 Valid, 3475 Invalid, 4089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1346 Valid, 2742 Invalid, 1 Unknown, 0 Unchecked, 39.7s Time] [2023-11-29 03:08:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38986 states. [2023-11-29 03:08:44,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38986 to 17770. [2023-11-29 03:08:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17770 states, 14046 states have (on average 1.2923964117898334) internal successors, (18153), 14046 states have internal predecessors, (18153), 3105 states have call successors, (3105), 618 states have call predecessors, (3105), 618 states have return successors, (3105), 3105 states have call predecessors, (3105), 3105 states have call successors, (3105) [2023-11-29 03:08:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17770 states to 17770 states and 24363 transitions. [2023-11-29 03:08:44,089 INFO L78 Accepts]: Start accepts. Automaton has 17770 states and 24363 transitions. Word has length 315 [2023-11-29 03:08:44,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:08:44,089 INFO L495 AbstractCegarLoop]: Abstraction has 17770 states and 24363 transitions. [2023-11-29 03:08:44,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 9.352941176470589) internal successors, (159), 16 states have internal predecessors, (159), 6 states have call successors, (90), 4 states have call predecessors, (90), 7 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) [2023-11-29 03:08:44,090 INFO L276 IsEmpty]: Start isEmpty. Operand 17770 states and 24363 transitions. [2023-11-29 03:08:44,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-11-29 03:08:44,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:08:44,094 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:08:44,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 03:08:44,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 03:08:44,294 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:08:44,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:44,295 INFO L85 PathProgramCache]: Analyzing trace with hash 26677613, now seen corresponding path program 1 times [2023-11-29 03:08:44,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:44,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609332123] [2023-11-29 03:08:44,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:44,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:44,334 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:08:44,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627580090] [2023-11-29 03:08:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:44,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:44,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:08:44,336 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:08:44,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 03:08:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:44,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:08:44,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:08:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-29 03:08:45,072 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:08:45,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:45,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609332123] [2023-11-29 03:08:45,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:08:45,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627580090] [2023-11-29 03:08:45,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627580090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:08:45,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:08:45,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:08:45,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078205096] [2023-11-29 03:08:45,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:08:45,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 03:08:45,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:45,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 03:08:45,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:08:45,075 INFO L87 Difference]: Start difference. First operand 17770 states and 24363 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:08:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:08:49,631 INFO L93 Difference]: Finished difference Result 28274 states and 38834 transitions. [2023-11-29 03:08:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 03:08:49,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 315 [2023-11-29 03:08:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:08:49,644 INFO L225 Difference]: With dead ends: 28274 [2023-11-29 03:08:49,644 INFO L226 Difference]: Without dead ends: 10670 [2023-11-29 03:08:49,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-29 03:08:49,659 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 287 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:08:49,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 1090 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:08:49,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10670 states. [2023-11-29 03:08:54,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10670 to 10613. [2023-11-29 03:08:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10613 states, 8616 states have (on average 1.3110492107706593) internal successors, (11296), 8616 states have internal predecessors, (11296), 1665 states have call successors, (1665), 331 states have call predecessors, (1665), 331 states have return successors, (1665), 1665 states have call predecessors, (1665), 1665 states have call successors, (1665) [2023-11-29 03:08:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10613 states to 10613 states and 14626 transitions. [2023-11-29 03:08:54,147 INFO L78 Accepts]: Start accepts. Automaton has 10613 states and 14626 transitions. Word has length 315 [2023-11-29 03:08:54,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:08:54,148 INFO L495 AbstractCegarLoop]: Abstraction has 10613 states and 14626 transitions. [2023-11-29 03:08:54,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:08:54,148 INFO L276 IsEmpty]: Start isEmpty. Operand 10613 states and 14626 transitions. [2023-11-29 03:08:54,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-11-29 03:08:54,150 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:08:54,151 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:08:54,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 03:08:54,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:54,351 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:08:54,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:54,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1714976366, now seen corresponding path program 1 times [2023-11-29 03:08:54,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:54,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817392603] [2023-11-29 03:08:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:54,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:54,388 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:08:54,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077708773] [2023-11-29 03:08:54,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:54,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:54,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:08:54,389 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:08:54,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 03:08:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:54,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 03:08:54,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:08:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2088 proven. 231 refuted. 0 times theorem prover too weak. 1641 trivial. 0 not checked. [2023-11-29 03:08:56,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:08:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 54 proven. 78 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:08:57,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817392603] [2023-11-29 03:08:57,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:08:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077708773] [2023-11-29 03:08:57,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077708773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:08:57,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:08:57,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 24 [2023-11-29 03:08:57,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914247369] [2023-11-29 03:08:57,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:08:57,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 03:08:57,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:57,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 03:08:57,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-29 03:08:57,143 INFO L87 Difference]: Start difference. First operand 10613 states and 14626 transitions. Second operand has 24 states, 24 states have (on average 7.375) internal successors, (177), 23 states have internal predecessors, (177), 6 states have call successors, (90), 5 states have call predecessors, (90), 8 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) [2023-11-29 03:09:13,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:09:13,282 INFO L93 Difference]: Finished difference Result 31152 states and 43076 transitions. [2023-11-29 03:09:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-29 03:09:13,283 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.375) internal successors, (177), 23 states have internal predecessors, (177), 6 states have call successors, (90), 5 states have call predecessors, (90), 8 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) Word has length 316 [2023-11-29 03:09:13,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:09:13,306 INFO L225 Difference]: With dead ends: 31152 [2023-11-29 03:09:13,306 INFO L226 Difference]: Without dead ends: 21684 [2023-11-29 03:09:13,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=941, Invalid=4029, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 03:09:13,316 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 3670 mSDsluCounter, 2636 mSDsCounter, 0 mSdLazyCounter, 3224 mSolverCounterSat, 871 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3690 SdHoareTripleChecker+Valid, 3011 SdHoareTripleChecker+Invalid, 4095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 871 IncrementalHoareTripleChecker+Valid, 3224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:09:13,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3690 Valid, 3011 Invalid, 4095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [871 Valid, 3224 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-29 03:09:13,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21684 states. [2023-11-29 03:09:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21684 to 10796. [2023-11-29 03:09:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10796 states, 8799 states have (on average 1.3106034776679167) internal successors, (11532), 8799 states have internal predecessors, (11532), 1665 states have call successors, (1665), 331 states have call predecessors, (1665), 331 states have return successors, (1665), 1665 states have call predecessors, (1665), 1665 states have call successors, (1665) [2023-11-29 03:09:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10796 states to 10796 states and 14862 transitions. [2023-11-29 03:09:17,781 INFO L78 Accepts]: Start accepts. Automaton has 10796 states and 14862 transitions. Word has length 316 [2023-11-29 03:09:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:09:17,782 INFO L495 AbstractCegarLoop]: Abstraction has 10796 states and 14862 transitions. [2023-11-29 03:09:17,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.375) internal successors, (177), 23 states have internal predecessors, (177), 6 states have call successors, (90), 5 states have call predecessors, (90), 8 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) [2023-11-29 03:09:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 10796 states and 14862 transitions. [2023-11-29 03:09:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-11-29 03:09:17,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:09:17,785 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:09:17,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 03:09:17,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:09:17,986 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:09:17,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:09:17,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1692344112, now seen corresponding path program 1 times [2023-11-29 03:09:17,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:09:17,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117416875] [2023-11-29 03:09:17,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:17,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:09:18,021 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:09:18,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291452133] [2023-11-29 03:09:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:18,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:09:18,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:09:18,023 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:09:18,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 03:09:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:18,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 03:09:18,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:09:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 150 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2023-11-29 03:09:19,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:09:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 108 proven. 153 refuted. 0 times theorem prover too weak. 3699 trivial. 0 not checked. [2023-11-29 03:09:35,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:09:35,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117416875] [2023-11-29 03:09:35,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:09:35,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291452133] [2023-11-29 03:09:35,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291452133] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:09:35,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:09:35,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-11-29 03:09:35,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468932773] [2023-11-29 03:09:35,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:09:35,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 03:09:35,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:09:35,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 03:09:35,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2023-11-29 03:09:35,751 INFO L87 Difference]: Start difference. First operand 10796 states and 14862 transitions. Second operand has 24 states, 23 states have (on average 6.956521739130435) internal successors, (160), 22 states have internal predecessors, (160), 6 states have call successors, (90), 4 states have call predecessors, (90), 7 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) [2023-11-29 03:09:55,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:10:01,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:10:07,146 WARN L539 Checker$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 03:10:11,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:10:12,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:10:15,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:10:17,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:10:22,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.79s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:10:31,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:11:18,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:11:31,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:11:35,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:11:38,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:11:41,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:12:10,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:12:19,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:12:33,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:12:41,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:12:41,513 INFO L93 Difference]: Finished difference Result 26864 states and 36559 transitions. [2023-11-29 03:12:41,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 03:12:41,514 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.956521739130435) internal successors, (160), 22 states have internal predecessors, (160), 6 states have call successors, (90), 4 states have call predecessors, (90), 7 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) Word has length 316 [2023-11-29 03:12:41,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:12:41,548 INFO L225 Difference]: With dead ends: 26864 [2023-11-29 03:12:41,548 INFO L226 Difference]: Without dead ends: 19188 [2023-11-29 03:12:41,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 626 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 81.4s TimeCoverageRelationStatistics Valid=2189, Invalid=6365, Unknown=2, NotChecked=0, Total=8556 [2023-11-29 03:12:41,561 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 3156 mSDsluCounter, 2316 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 1307 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3156 SdHoareTripleChecker+Valid, 2827 SdHoareTripleChecker+Invalid, 3815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1307 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:12:41,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3156 Valid, 2827 Invalid, 3815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1307 Valid, 2506 Invalid, 2 Unknown, 0 Unchecked, 94.7s Time] [2023-11-29 03:12:41,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19188 states. [2023-11-29 03:12:48,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19188 to 11242. [2023-11-29 03:12:48,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11242 states, 9061 states have (on average 1.3019534267740867) internal successors, (11797), 9061 states have internal predecessors, (11797), 1800 states have call successors, (1800), 380 states have call predecessors, (1800), 380 states have return successors, (1800), 1800 states have call predecessors, (1800), 1800 states have call successors, (1800) [2023-11-29 03:12:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11242 states to 11242 states and 15397 transitions. [2023-11-29 03:12:48,352 INFO L78 Accepts]: Start accepts. Automaton has 11242 states and 15397 transitions. Word has length 316 [2023-11-29 03:12:48,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:12:48,352 INFO L495 AbstractCegarLoop]: Abstraction has 11242 states and 15397 transitions. [2023-11-29 03:12:48,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.956521739130435) internal successors, (160), 22 states have internal predecessors, (160), 6 states have call successors, (90), 4 states have call predecessors, (90), 7 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) [2023-11-29 03:12:48,352 INFO L276 IsEmpty]: Start isEmpty. Operand 11242 states and 15397 transitions. [2023-11-29 03:12:48,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-11-29 03:12:48,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:12:48,356 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:12:48,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 03:12:48,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:12:48,556 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:12:48,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:12:48,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1193205520, now seen corresponding path program 1 times [2023-11-29 03:12:48,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:12:48,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185112731] [2023-11-29 03:12:48,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:12:48,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:12:48,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:12:48,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55963134] [2023-11-29 03:12:48,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:12:48,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:12:48,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:12:48,592 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:12:48,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b86713-b74e-4389-8e3b-d8934b863785/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 03:12:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:12:49,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 03:12:49,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:12:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2254 proven. 231 refuted. 0 times theorem prover too weak. 1475 trivial. 0 not checked. [2023-11-29 03:12:52,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:13:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 90 proven. 171 refuted. 0 times theorem prover too weak. 3699 trivial. 0 not checked. [2023-11-29 03:13:16,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:13:16,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185112731] [2023-11-29 03:13:16,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:13:16,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55963134] [2023-11-29 03:13:16,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55963134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:13:16,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:13:16,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 41 [2023-11-29 03:13:16,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135629088] [2023-11-29 03:13:16,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:13:16,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 03:13:16,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:13:16,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 03:13:16,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 03:13:16,743 INFO L87 Difference]: Start difference. First operand 11242 states and 15397 transitions. Second operand has 41 states, 41 states have (on average 4.195121951219512) internal successors, (172), 41 states have internal predecessors, (172), 8 states have call successors, (90), 5 states have call predecessors, (90), 9 states have return successors, (90), 8 states have call predecessors, (90), 8 states have call successors, (90) [2023-11-29 03:13:37,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:13:56,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:14:17,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.72s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:32,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:37,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:40,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:42,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:47,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:51,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:52,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:15:00,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:15:03,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:15:13,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:15:15,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:15:40,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:16:28,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:18:03,586 WARN L293 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 187 DAG size of output: 135 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)