./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-66.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_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/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_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-66.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/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_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/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 f74c38136cb9ba6654a79a08d65b3f5604dc940c8f0684c77bafb8f477e997ef --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:02:30,537 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:02:30,602 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:02:30,607 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:02:30,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:02:30,632 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:02:30,633 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:02:30,633 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:02:30,634 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:02:30,634 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:02:30,635 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:02:30,635 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:02:30,636 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:02:30,637 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:02:30,637 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:02:30,638 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:02:30,638 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:02:30,639 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:02:30,639 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:02:30,640 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:02:30,640 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:02:30,641 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:02:30,641 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:02:30,642 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:02:30,642 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:02:30,643 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:02:30,643 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:02:30,650 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:02:30,651 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:02:30,651 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:02:30,652 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:02:30,652 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:02:30,653 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:02:30,653 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:02:30,653 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:02:30,654 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:02:30,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:02:30,655 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:02:30,655 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:02:30,655 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:02:30,656 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:02:30,657 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:02:30,657 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_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f74c38136cb9ba6654a79a08d65b3f5604dc940c8f0684c77bafb8f477e997ef [2023-11-29 00:02:30,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:02:30,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:02:30,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:02:30,922 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:02:30,923 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:02:30,924 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-66.i [2023-11-29 00:02:33,671 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:02:33,941 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:02:33,942 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-66.i [2023-11-29 00:02:33,958 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/data/1ea6d8665/51827866af0a4b3bb441e4ce67afea29/FLAGe6a7a83d4 [2023-11-29 00:02:33,973 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/data/1ea6d8665/51827866af0a4b3bb441e4ce67afea29 [2023-11-29 00:02:33,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:02:33,977 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:02:33,978 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:02:33,979 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:02:33,984 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:02:33,985 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:02:33" (1/1) ... [2023-11-29 00:02:33,986 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6142e652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:33, skipping insertion in model container [2023-11-29 00:02:33,986 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:02:33" (1/1) ... [2023-11-29 00:02:34,056 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:02:34,203 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_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-66.i[916,929] [2023-11-29 00:02:34,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:02:34,441 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:02:34,453 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_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-66.i[916,929] [2023-11-29 00:02:34,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:02:34,590 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:02:34,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:34 WrapperNode [2023-11-29 00:02:34,591 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:02:34,592 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:02:34,592 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:02:34,592 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:02:34,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:34" (1/1) ... [2023-11-29 00:02:34,627 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:34" (1/1) ... [2023-11-29 00:02:34,744 INFO L138 Inliner]: procedures = 26, calls = 81, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 863 [2023-11-29 00:02:34,745 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:02:34,745 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:02:34,745 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:02:34,746 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:02:34,757 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:34" (1/1) ... [2023-11-29 00:02:34,757 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:34" (1/1) ... [2023-11-29 00:02:34,779 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:34" (1/1) ... [2023-11-29 00:02:34,881 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 00:02:34,881 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:34" (1/1) ... [2023-11-29 00:02:34,882 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:34" (1/1) ... [2023-11-29 00:02:34,907 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:34" (1/1) ... [2023-11-29 00:02:34,916 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:34" (1/1) ... [2023-11-29 00:02:34,927 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:34" (1/1) ... [2023-11-29 00:02:34,934 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:34" (1/1) ... [2023-11-29 00:02:34,949 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:02:34,950 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:02:34,950 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:02:34,950 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:02:34,951 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:34" (1/1) ... [2023-11-29 00:02:34,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:02:34,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:34,985 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:02:34,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:02:35,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:02:35,013 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:02:35,013 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:02:35,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:02:35,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:02:35,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:02:35,148 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:02:35,151 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:02:36,283 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:02:36,339 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:02:36,339 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:02:36,340 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:02:36 BoogieIcfgContainer [2023-11-29 00:02:36,340 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:02:36,342 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:02:36,342 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:02:36,344 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:02:36,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:02:33" (1/3) ... [2023-11-29 00:02:36,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51562656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:02:36, skipping insertion in model container [2023-11-29 00:02:36,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:02:34" (2/3) ... [2023-11-29 00:02:36,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51562656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:02:36, skipping insertion in model container [2023-11-29 00:02:36,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:02:36" (3/3) ... [2023-11-29 00:02:36,347 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-66.i [2023-11-29 00:02:36,362 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:02:36,362 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:02:36,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:02:36,419 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;@7a903fd4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:02:36,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:02:36,425 INFO L276 IsEmpty]: Start isEmpty. Operand has 306 states, 235 states have (on average 1.6042553191489362) internal successors, (377), 236 states have internal predecessors, (377), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-29 00:02:36,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-29 00:02:36,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:02:36,455 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:36,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:02:36,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:36,461 INFO L85 PathProgramCache]: Analyzing trace with hash 907615551, now seen corresponding path program 1 times [2023-11-29 00:02:36,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:36,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159928581] [2023-11-29 00:02:36,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:36,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:36,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:02:36,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159928581] [2023-11-29 00:02:36,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:02:36,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591537789] [2023-11-29 00:02:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:36,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:36,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:36,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:36,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:02:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:37,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 1260 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:02:37,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 8978 trivial. 0 not checked. [2023-11-29 00:02:37,330 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:37,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591537789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:37,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:37,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:02:37,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784529587] [2023-11-29 00:02:37,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:37,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:02:37,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:02:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:02:37,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:02:37,369 INFO L87 Difference]: Start difference. First operand has 306 states, 235 states have (on average 1.6042553191489362) internal successors, (377), 236 states have internal predecessors, (377), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) Second operand has 2 states, 2 states have (on average 69.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 2 states have call successors, (68) [2023-11-29 00:02:37,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:02:37,444 INFO L93 Difference]: Finished difference Result 609 states and 1092 transitions. [2023-11-29 00:02:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:02:37,447 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 69.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 2 states have call successors, (68) Word has length 473 [2023-11-29 00:02:37,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:02:37,458 INFO L225 Difference]: With dead ends: 609 [2023-11-29 00:02:37,458 INFO L226 Difference]: Without dead ends: 304 [2023-11-29 00:02:37,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 472 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 00:02:37,467 INFO L413 NwaCegarLoop]: 505 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, 505 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 00:02:37,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 505 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:02:37,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-29 00:02:37,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2023-11-29 00:02:37,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 234 states have (on average 1.5897435897435896) internal successors, (372), 234 states have internal predecessors, (372), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-29 00:02:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 508 transitions. [2023-11-29 00:02:37,534 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 508 transitions. Word has length 473 [2023-11-29 00:02:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:02:37,534 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 508 transitions. [2023-11-29 00:02:37,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 2 states have call successors, (68) [2023-11-29 00:02:37,535 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 508 transitions. [2023-11-29 00:02:37,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-29 00:02:37,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:02:37,546 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:37,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:02:37,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 00:02:37,747 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:02:37,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:37,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2058272267, now seen corresponding path program 1 times [2023-11-29 00:02:37,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:37,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274215628] [2023-11-29 00:02:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:37,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:37,863 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:02:37,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018323104] [2023-11-29 00:02:37,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:37,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:37,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:37,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:37,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:02:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:38,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 1260 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:02:38,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:02:38,391 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:38,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:02:38,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274215628] [2023-11-29 00:02:38,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:02:38,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018323104] [2023-11-29 00:02:38,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018323104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:38,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:38,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:02:38,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808863913] [2023-11-29 00:02:38,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:38,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:02:38,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:02:38,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:02:38,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:02:38,396 INFO L87 Difference]: Start difference. First operand 304 states and 508 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:02:38,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:02:38,512 INFO L93 Difference]: Finished difference Result 608 states and 1017 transitions. [2023-11-29 00:02:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:02:38,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 473 [2023-11-29 00:02:38,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:02:38,519 INFO L225 Difference]: With dead ends: 608 [2023-11-29 00:02:38,519 INFO L226 Difference]: Without dead ends: 305 [2023-11-29 00:02:38,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 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 00:02:38,522 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 0 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:02:38,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1001 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:02:38,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-11-29 00:02:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2023-11-29 00:02:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 235 states have (on average 1.5872340425531914) internal successors, (373), 235 states have internal predecessors, (373), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-29 00:02:38,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 509 transitions. [2023-11-29 00:02:38,552 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 509 transitions. Word has length 473 [2023-11-29 00:02:38,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:02:38,555 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 509 transitions. [2023-11-29 00:02:38,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:02:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 509 transitions. [2023-11-29 00:02:38,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-29 00:02:38,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:02:38,567 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:38,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:02:38,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 00:02:38,768 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:02:38,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:38,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1016326973, now seen corresponding path program 1 times [2023-11-29 00:02:38,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:38,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269183455] [2023-11-29 00:02:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:38,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:38,868 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:02:38,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645965622] [2023-11-29 00:02:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:38,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:38,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:38,870 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:38,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:02:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:39,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:02:39,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:02:39,371 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:39,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:02:39,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269183455] [2023-11-29 00:02:39,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:02:39,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645965622] [2023-11-29 00:02:39,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645965622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:39,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:39,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:02:39,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054625148] [2023-11-29 00:02:39,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:39,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:02:39,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:02:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:02:39,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:02:39,377 INFO L87 Difference]: Start difference. First operand 305 states and 509 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:02:39,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:02:39,503 INFO L93 Difference]: Finished difference Result 811 states and 1352 transitions. [2023-11-29 00:02:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:02:39,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 474 [2023-11-29 00:02:39,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:02:39,510 INFO L225 Difference]: With dead ends: 811 [2023-11-29 00:02:39,510 INFO L226 Difference]: Without dead ends: 507 [2023-11-29 00:02:39,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:02:39,512 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 324 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:02:39,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 999 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:02:39,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-11-29 00:02:39,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 504. [2023-11-29 00:02:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 418 states have (on average 1.6076555023923444) internal successors, (672), 419 states have internal predecessors, (672), 83 states have call successors, (83), 2 states have call predecessors, (83), 2 states have return successors, (83), 82 states have call predecessors, (83), 83 states have call successors, (83) [2023-11-29 00:02:39,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 838 transitions. [2023-11-29 00:02:39,565 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 838 transitions. Word has length 474 [2023-11-29 00:02:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:02:39,567 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 838 transitions. [2023-11-29 00:02:39,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:02:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 838 transitions. [2023-11-29 00:02:39,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-29 00:02:39,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:02:39,576 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:39,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:02:39,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:39,781 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:02:39,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:39,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1262444954, now seen corresponding path program 1 times [2023-11-29 00:02:39,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:39,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792793655] [2023-11-29 00:02:39,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:39,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:39,886 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:02:39,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864192566] [2023-11-29 00:02:39,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:39,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:39,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:39,888 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:39,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:02:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:40,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:02:40,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:02:40,361 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:40,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:02:40,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792793655] [2023-11-29 00:02:40,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:02:40,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864192566] [2023-11-29 00:02:40,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864192566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:40,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:40,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:02:40,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719631144] [2023-11-29 00:02:40,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:40,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:02:40,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:02:40,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:02:40,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:02:40,365 INFO L87 Difference]: Start difference. First operand 504 states and 838 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:02:40,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:02:40,484 INFO L93 Difference]: Finished difference Result 1502 states and 2496 transitions. [2023-11-29 00:02:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:02:40,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 475 [2023-11-29 00:02:40,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:02:40,496 INFO L225 Difference]: With dead ends: 1502 [2023-11-29 00:02:40,496 INFO L226 Difference]: Without dead ends: 999 [2023-11-29 00:02:40,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 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 00:02:40,499 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 488 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:02:40,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 1326 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:02:40,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2023-11-29 00:02:40,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 997. [2023-11-29 00:02:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 826 states have (on average 1.5956416464891041) internal successors, (1318), 828 states have internal predecessors, (1318), 166 states have call successors, (166), 4 states have call predecessors, (166), 4 states have return successors, (166), 164 states have call predecessors, (166), 166 states have call successors, (166) [2023-11-29 00:02:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1650 transitions. [2023-11-29 00:02:40,651 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1650 transitions. Word has length 475 [2023-11-29 00:02:40,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:02:40,652 INFO L495 AbstractCegarLoop]: Abstraction has 997 states and 1650 transitions. [2023-11-29 00:02:40,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:02:40,653 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1650 transitions. [2023-11-29 00:02:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-29 00:02:40,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:02:40,659 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:40,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 00:02:40,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:40,861 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:02:40,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:40,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1730930342, now seen corresponding path program 1 times [2023-11-29 00:02:40,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:40,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221602643] [2023-11-29 00:02:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:40,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:40,941 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:02:40,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94427106] [2023-11-29 00:02:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:40,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:40,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:40,943 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:40,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:02:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:41,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:02:41,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:02:41,430 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:41,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:02:41,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221602643] [2023-11-29 00:02:41,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:02:41,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94427106] [2023-11-29 00:02:41,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94427106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:41,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:41,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:02:41,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370306868] [2023-11-29 00:02:41,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:41,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:02:41,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:02:41,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:02:41,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:02:41,435 INFO L87 Difference]: Start difference. First operand 997 states and 1650 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:02:41,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:02:41,547 INFO L93 Difference]: Finished difference Result 1997 states and 3304 transitions. [2023-11-29 00:02:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:02:41,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 475 [2023-11-29 00:02:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:02:41,557 INFO L225 Difference]: With dead ends: 1997 [2023-11-29 00:02:41,557 INFO L226 Difference]: Without dead ends: 1001 [2023-11-29 00:02:41,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 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 00:02:41,560 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 470 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:02:41,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 983 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:02:41,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2023-11-29 00:02:41,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 999. [2023-11-29 00:02:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 828 states have (on average 1.5869565217391304) internal successors, (1314), 830 states have internal predecessors, (1314), 166 states have call successors, (166), 4 states have call predecessors, (166), 4 states have return successors, (166), 164 states have call predecessors, (166), 166 states have call successors, (166) [2023-11-29 00:02:41,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1646 transitions. [2023-11-29 00:02:41,646 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1646 transitions. Word has length 475 [2023-11-29 00:02:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:02:41,647 INFO L495 AbstractCegarLoop]: Abstraction has 999 states and 1646 transitions. [2023-11-29 00:02:41,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:02:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1646 transitions. [2023-11-29 00:02:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-29 00:02:41,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:02:41,654 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:41,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:02:41,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:41,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:02:41,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:41,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1456170728, now seen corresponding path program 1 times [2023-11-29 00:02:41,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:41,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034778982] [2023-11-29 00:02:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:41,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:41,946 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:02:41,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564986411] [2023-11-29 00:02:41,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:41,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:41,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:41,948 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:41,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:02:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:42,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 1260 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:02:42,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:02:42,405 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:42,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:02:42,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034778982] [2023-11-29 00:02:42,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:02:42,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564986411] [2023-11-29 00:02:42,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564986411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:42,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:42,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:02:42,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274159809] [2023-11-29 00:02:42,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:42,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:02:42,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:02:42,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:02:42,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:02:42,409 INFO L87 Difference]: Start difference. First operand 999 states and 1646 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:02:42,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:02:42,512 INFO L93 Difference]: Finished difference Result 2991 states and 4928 transitions. [2023-11-29 00:02:42,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:02:42,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 475 [2023-11-29 00:02:42,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:02:42,528 INFO L225 Difference]: With dead ends: 2991 [2023-11-29 00:02:42,528 INFO L226 Difference]: Without dead ends: 1993 [2023-11-29 00:02:42,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 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 00:02:42,532 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 475 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:02:42,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 1133 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:02:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2023-11-29 00:02:42,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1991. [2023-11-29 00:02:42,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1650 states have (on average 1.5818181818181818) internal successors, (2610), 1654 states have internal predecessors, (2610), 332 states have call successors, (332), 8 states have call predecessors, (332), 8 states have return successors, (332), 328 states have call predecessors, (332), 332 states have call successors, (332) [2023-11-29 00:02:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3274 transitions. [2023-11-29 00:02:42,703 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3274 transitions. Word has length 475 [2023-11-29 00:02:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:02:42,704 INFO L495 AbstractCegarLoop]: Abstraction has 1991 states and 3274 transitions. [2023-11-29 00:02:42,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:02:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3274 transitions. [2023-11-29 00:02:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-29 00:02:42,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:02:42,710 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:42,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:02:42,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:42,911 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:02:42,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:42,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2106829142, now seen corresponding path program 1 times [2023-11-29 00:02:42,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:42,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184942510] [2023-11-29 00:02:42,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:42,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:42,998 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:02:42,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607608430] [2023-11-29 00:02:42,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:42,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:42,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:43,000 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:43,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:02:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:43,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:02:43,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:02:43,491 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:43,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:02:43,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184942510] [2023-11-29 00:02:43,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:02:43,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607608430] [2023-11-29 00:02:43,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607608430] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:43,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:43,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:02:43,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214409212] [2023-11-29 00:02:43,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:43,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:02:43,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:02:43,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:02:43,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:02:43,495 INFO L87 Difference]: Start difference. First operand 1991 states and 3274 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:02:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:02:44,224 INFO L93 Difference]: Finished difference Result 6053 states and 9941 transitions. [2023-11-29 00:02:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:02:44,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 475 [2023-11-29 00:02:44,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:02:44,249 INFO L225 Difference]: With dead ends: 6053 [2023-11-29 00:02:44,250 INFO L226 Difference]: Without dead ends: 4063 [2023-11-29 00:02:44,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:02:44,256 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 1299 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:02:44,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1299 Valid, 1623 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:02:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2023-11-29 00:02:44,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 3579. [2023-11-29 00:02:44,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3579 states, 2958 states have (on average 1.577417173766058) internal successors, (4666), 2962 states have internal predecessors, (4666), 604 states have call successors, (604), 16 states have call predecessors, (604), 16 states have return successors, (604), 600 states have call predecessors, (604), 604 states have call successors, (604) [2023-11-29 00:02:44,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3579 states to 3579 states and 5874 transitions. [2023-11-29 00:02:44,517 INFO L78 Accepts]: Start accepts. Automaton has 3579 states and 5874 transitions. Word has length 475 [2023-11-29 00:02:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:02:44,518 INFO L495 AbstractCegarLoop]: Abstraction has 3579 states and 5874 transitions. [2023-11-29 00:02:44,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:02:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3579 states and 5874 transitions. [2023-11-29 00:02:44,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-29 00:02:44,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:02:44,524 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:44,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 00:02:44,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:44,725 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:02:44,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:44,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1812001284, now seen corresponding path program 1 times [2023-11-29 00:02:44,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:44,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636908631] [2023-11-29 00:02:44,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:44,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:44,789 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:02:44,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144664092] [2023-11-29 00:02:44,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:44,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:44,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:44,791 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:44,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:02:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:45,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:02:45,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:02:46,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:46,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:02:46,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636908631] [2023-11-29 00:02:46,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:02:46,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144664092] [2023-11-29 00:02:46,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144664092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:46,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:46,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:02:46,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630734352] [2023-11-29 00:02:46,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:46,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:02:46,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:02:46,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:02:46,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:02:46,350 INFO L87 Difference]: Start difference. First operand 3579 states and 5874 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:02:46,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:02:46,849 INFO L93 Difference]: Finished difference Result 10029 states and 16396 transitions. [2023-11-29 00:02:46,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:02:46,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 475 [2023-11-29 00:02:46,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:02:46,891 INFO L225 Difference]: With dead ends: 10029 [2023-11-29 00:02:46,891 INFO L226 Difference]: Without dead ends: 6451 [2023-11-29 00:02:46,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 472 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 00:02:46,903 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 565 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:02:46,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1602 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:02:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2023-11-29 00:02:47,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 5123. [2023-11-29 00:02:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5123 states, 4432 states have (on average 1.5848375451263539) internal successors, (7024), 4436 states have internal predecessors, (7024), 672 states have call successors, (672), 18 states have call predecessors, (672), 18 states have return successors, (672), 668 states have call predecessors, (672), 672 states have call successors, (672) [2023-11-29 00:02:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5123 states to 5123 states and 8368 transitions. [2023-11-29 00:02:47,374 INFO L78 Accepts]: Start accepts. Automaton has 5123 states and 8368 transitions. Word has length 475 [2023-11-29 00:02:47,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:02:47,375 INFO L495 AbstractCegarLoop]: Abstraction has 5123 states and 8368 transitions. [2023-11-29 00:02:47,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:02:47,375 INFO L276 IsEmpty]: Start isEmpty. Operand 5123 states and 8368 transitions. [2023-11-29 00:02:47,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-11-29 00:02:47,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:02:47,383 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:47,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:02:47,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 00:02:47,585 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:02:47,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:47,586 INFO L85 PathProgramCache]: Analyzing trace with hash 223732960, now seen corresponding path program 1 times [2023-11-29 00:02:47,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:47,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424241494] [2023-11-29 00:02:47,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:47,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:47,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:02:47,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803709183] [2023-11-29 00:02:47,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:47,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:47,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:47,659 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:47,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:02:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:48,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:02:48,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 3631 proven. 147 refuted. 0 times theorem prover too weak. 5334 trivial. 0 not checked. [2023-11-29 00:02:48,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:02:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 54 proven. 147 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 00:02:48,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:02:48,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424241494] [2023-11-29 00:02:48,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:02:48,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803709183] [2023-11-29 00:02:48,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803709183] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:02:48,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:02:48,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:02:48,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822507341] [2023-11-29 00:02:48,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:02:48,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:02:48,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:02:48,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:02:48,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:02:48,844 INFO L87 Difference]: Start difference. First operand 5123 states and 8368 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 2 states have call predecessors, (118), 2 states have call successors, (118) [2023-11-29 00:02:53,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:02:53,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:02:53,521 INFO L93 Difference]: Finished difference Result 10111 states and 16440 transitions. [2023-11-29 00:02:53,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:02:53,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 2 states have call predecessors, (118), 2 states have call successors, (118) Word has length 476 [2023-11-29 00:02:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:02:53,547 INFO L225 Difference]: With dead ends: 10111 [2023-11-29 00:02:53,547 INFO L226 Difference]: Without dead ends: 5213 [2023-11-29 00:02:53,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 944 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:02:53,557 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 341 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:02:53,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 1136 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 376 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-11-29 00:02:53,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5213 states. [2023-11-29 00:02:53,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5213 to 5159. [2023-11-29 00:02:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5159 states, 4459 states have (on average 1.576810944157883) internal successors, (7031), 4463 states have internal predecessors, (7031), 672 states have call successors, (672), 27 states have call predecessors, (672), 27 states have return successors, (672), 668 states have call predecessors, (672), 672 states have call successors, (672) [2023-11-29 00:02:53,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5159 states to 5159 states and 8375 transitions. [2023-11-29 00:02:53,857 INFO L78 Accepts]: Start accepts. Automaton has 5159 states and 8375 transitions. Word has length 476 [2023-11-29 00:02:53,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:02:53,857 INFO L495 AbstractCegarLoop]: Abstraction has 5159 states and 8375 transitions. [2023-11-29 00:02:53,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 2 states have call predecessors, (118), 2 states have call successors, (118) [2023-11-29 00:02:53,858 INFO L276 IsEmpty]: Start isEmpty. Operand 5159 states and 8375 transitions. [2023-11-29 00:02:53,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2023-11-29 00:02:53,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:02:53,863 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:53,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:02:54,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 00:02:54,064 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:02:54,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:54,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1124538956, now seen corresponding path program 1 times [2023-11-29 00:02:54,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:54,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046777206] [2023-11-29 00:02:54,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:54,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:54,144 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:02:54,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926374615] [2023-11-29 00:02:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:54,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:54,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:54,146 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:54,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:02:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:54,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:02:54,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 3363 proven. 153 refuted. 0 times theorem prover too weak. 5596 trivial. 0 not checked. [2023-11-29 00:02:54,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:02:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 48 proven. 153 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 00:02:55,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:02:55,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046777206] [2023-11-29 00:02:55,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:02:55,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926374615] [2023-11-29 00:02:55,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926374615] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:02:55,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:02:55,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:02:55,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447133746] [2023-11-29 00:02:55,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:02:55,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:02:55,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:02:55,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:02:55,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:02:55,338 INFO L87 Difference]: Start difference. First operand 5159 states and 8375 transitions. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 2 states have call predecessors, (120), 2 states have call successors, (120) [2023-11-29 00:02:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:02:55,901 INFO L93 Difference]: Finished difference Result 8526 states and 13774 transitions. [2023-11-29 00:02:55,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:02:55,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 2 states have call predecessors, (120), 2 states have call successors, (120) Word has length 477 [2023-11-29 00:02:55,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:02:55,926 INFO L225 Difference]: With dead ends: 8526 [2023-11-29 00:02:55,926 INFO L226 Difference]: Without dead ends: 3785 [2023-11-29 00:02:55,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 946 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:02:55,936 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 327 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:02:55,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 1085 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:02:55,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2023-11-29 00:02:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3413. [2023-11-29 00:02:56,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 2764 states have (on average 1.5321997105643994) internal successors, (4235), 2764 states have internal predecessors, (4235), 612 states have call successors, (612), 36 states have call predecessors, (612), 36 states have return successors, (612), 612 states have call predecessors, (612), 612 states have call successors, (612) [2023-11-29 00:02:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 5459 transitions. [2023-11-29 00:02:56,099 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 5459 transitions. Word has length 477 [2023-11-29 00:02:56,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:02:56,100 INFO L495 AbstractCegarLoop]: Abstraction has 3413 states and 5459 transitions. [2023-11-29 00:02:56,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 2 states have call predecessors, (120), 2 states have call successors, (120) [2023-11-29 00:02:56,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 5459 transitions. [2023-11-29 00:02:56,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2023-11-29 00:02:56,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:02:56,107 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:56,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:02:56,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:02:56,308 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:02:56,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:56,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1717942260, now seen corresponding path program 1 times [2023-11-29 00:02:56,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:56,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335178260] [2023-11-29 00:02:56,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:56,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:56,379 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:02:56,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587594460] [2023-11-29 00:02:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:56,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:56,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:56,380 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:56,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:02:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:56,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:02:56,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:02:58,617 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:02:58,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:02:58,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335178260] [2023-11-29 00:02:58,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:02:58,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587594460] [2023-11-29 00:02:58,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587594460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:02:58,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:02:58,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:02:58,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604758104] [2023-11-29 00:02:58,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:02:58,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:02:58,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:02:58,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:02:58,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:02:58,621 INFO L87 Difference]: Start difference. First operand 3413 states and 5459 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:02:59,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:02:59,102 INFO L93 Difference]: Finished difference Result 7011 states and 11194 transitions. [2023-11-29 00:02:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:02:59,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 477 [2023-11-29 00:02:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:02:59,116 INFO L225 Difference]: With dead ends: 7011 [2023-11-29 00:02:59,116 INFO L226 Difference]: Without dead ends: 3741 [2023-11-29 00:02:59,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:02:59,123 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 880 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 2032 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:02:59,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [880 Valid, 2032 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:02:59,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2023-11-29 00:02:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 3413. [2023-11-29 00:02:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 2764 states have (on average 1.5311143270622287) internal successors, (4232), 2764 states have internal predecessors, (4232), 612 states have call successors, (612), 36 states have call predecessors, (612), 36 states have return successors, (612), 612 states have call predecessors, (612), 612 states have call successors, (612) [2023-11-29 00:02:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 5456 transitions. [2023-11-29 00:02:59,296 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 5456 transitions. Word has length 477 [2023-11-29 00:02:59,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:02:59,297 INFO L495 AbstractCegarLoop]: Abstraction has 3413 states and 5456 transitions. [2023-11-29 00:02:59,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:02:59,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 5456 transitions. [2023-11-29 00:02:59,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2023-11-29 00:02:59,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:02:59,303 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:02:59,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:02:59,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:59,503 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:02:59,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:59,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1456312801, now seen corresponding path program 1 times [2023-11-29 00:02:59,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:59,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69250415] [2023-11-29 00:02:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:59,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:59,566 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:02:59,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257150060] [2023-11-29 00:02:59,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:59,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:59,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:59,568 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:59,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:02:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:59,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:02:59,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4475 proven. 201 refuted. 0 times theorem prover too weak. 4436 trivial. 0 not checked. [2023-11-29 00:03:00,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 00:03:01,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:01,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69250415] [2023-11-29 00:03:01,353 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:01,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257150060] [2023-11-29 00:03:01,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257150060] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:01,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:03:01,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 00:03:01,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397404842] [2023-11-29 00:03:01,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:01,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:03:01,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:01,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:03:01,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:03:01,356 INFO L87 Difference]: Start difference. First operand 3413 states and 5456 transitions. Second operand has 12 states, 12 states have (on average 18.333333333333332) internal successors, (220), 12 states have internal predecessors, (220), 5 states have call successors, (135), 3 states have call predecessors, (135), 5 states have return successors, (136), 4 states have call predecessors, (136), 5 states have call successors, (136) [2023-11-29 00:03:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:02,229 INFO L93 Difference]: Finished difference Result 6761 states and 10707 transitions. [2023-11-29 00:03:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:03:02,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 18.333333333333332) internal successors, (220), 12 states have internal predecessors, (220), 5 states have call successors, (135), 3 states have call predecessors, (135), 5 states have return successors, (136), 4 states have call predecessors, (136), 5 states have call successors, (136) Word has length 478 [2023-11-29 00:03:02,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:02,238 INFO L225 Difference]: With dead ends: 6761 [2023-11-29 00:03:02,238 INFO L226 Difference]: Without dead ends: 3557 [2023-11-29 00:03:02,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 944 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:03:02,244 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 1289 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:02,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1289 Valid, 1509 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:03:02,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2023-11-29 00:03:02,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 3485. [2023-11-29 00:03:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3485 states, 2818 states have (on average 1.5060326472675656) internal successors, (4244), 2818 states have internal predecessors, (4244), 612 states have call successors, (612), 54 states have call predecessors, (612), 54 states have return successors, (612), 612 states have call predecessors, (612), 612 states have call successors, (612) [2023-11-29 00:03:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3485 states to 3485 states and 5468 transitions. [2023-11-29 00:03:02,441 INFO L78 Accepts]: Start accepts. Automaton has 3485 states and 5468 transitions. Word has length 478 [2023-11-29 00:03:02,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:02,442 INFO L495 AbstractCegarLoop]: Abstraction has 3485 states and 5468 transitions. [2023-11-29 00:03:02,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.333333333333332) internal successors, (220), 12 states have internal predecessors, (220), 5 states have call successors, (135), 3 states have call predecessors, (135), 5 states have return successors, (136), 4 states have call predecessors, (136), 5 states have call successors, (136) [2023-11-29 00:03:02,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3485 states and 5468 transitions. [2023-11-29 00:03:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2023-11-29 00:03:02,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:02,448 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:02,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:03:02,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:02,649 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:02,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:02,650 INFO L85 PathProgramCache]: Analyzing trace with hash -459327494, now seen corresponding path program 1 times [2023-11-29 00:03:02,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:02,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021685477] [2023-11-29 00:03:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:02,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:02,700 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:02,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574066899] [2023-11-29 00:03:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:02,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:02,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:02,702 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:02,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:03:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:03,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:03:03,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4351 proven. 75 refuted. 0 times theorem prover too weak. 4686 trivial. 0 not checked. [2023-11-29 00:03:03,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 126 proven. 75 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 00:03:03,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:03,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021685477] [2023-11-29 00:03:03,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:03,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574066899] [2023-11-29 00:03:03,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574066899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:03,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:03:03,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 00:03:03,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222677702] [2023-11-29 00:03:03,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:03,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:03:03,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:03:03,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:03:03,537 INFO L87 Difference]: Start difference. First operand 3485 states and 5468 transitions. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 2 states have call successors, (93), 2 states have call predecessors, (93), 4 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) [2023-11-29 00:03:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:04,098 INFO L93 Difference]: Finished difference Result 5049 states and 7882 transitions. [2023-11-29 00:03:04,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:03:04,099 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 2 states have call successors, (93), 2 states have call predecessors, (93), 4 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) Word has length 479 [2023-11-29 00:03:04,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:04,104 INFO L225 Difference]: With dead ends: 5049 [2023-11-29 00:03:04,104 INFO L226 Difference]: Without dead ends: 1925 [2023-11-29 00:03:04,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 949 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:03:04,109 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 980 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:04,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [981 Valid, 1100 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:03:04,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2023-11-29 00:03:04,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1879. [2023-11-29 00:03:04,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1503 states have (on average 1.4923486360612108) internal successors, (2243), 1503 states have internal predecessors, (2243), 340 states have call successors, (340), 35 states have call predecessors, (340), 35 states have return successors, (340), 340 states have call predecessors, (340), 340 states have call successors, (340) [2023-11-29 00:03:04,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 2923 transitions. [2023-11-29 00:03:04,282 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 2923 transitions. Word has length 479 [2023-11-29 00:03:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:04,283 INFO L495 AbstractCegarLoop]: Abstraction has 1879 states and 2923 transitions. [2023-11-29 00:03:04,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 2 states have call successors, (93), 2 states have call predecessors, (93), 4 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) [2023-11-29 00:03:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 2923 transitions. [2023-11-29 00:03:04,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2023-11-29 00:03:04,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:04,289 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:04,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:03:04,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:04,490 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:04,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:04,490 INFO L85 PathProgramCache]: Analyzing trace with hash 2003623939, now seen corresponding path program 1 times [2023-11-29 00:03:04,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:04,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087308965] [2023-11-29 00:03:04,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:04,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:04,554 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:04,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013723215] [2023-11-29 00:03:04,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:04,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:04,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:04,555 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:04,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:03:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:04,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 00:03:04,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:03:05,513 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:03:05,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:05,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087308965] [2023-11-29 00:03:05,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:05,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013723215] [2023-11-29 00:03:05,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013723215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:03:05,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:03:05,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:03:05,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380127866] [2023-11-29 00:03:05,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:03:05,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:03:05,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:03:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:03:05,516 INFO L87 Difference]: Start difference. First operand 1879 states and 2923 transitions. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:03:08,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:08,321 INFO L93 Difference]: Finished difference Result 11245 states and 17327 transitions. [2023-11-29 00:03:08,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 00:03:08,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 480 [2023-11-29 00:03:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:08,340 INFO L225 Difference]: With dead ends: 11245 [2023-11-29 00:03:08,340 INFO L226 Difference]: Without dead ends: 9307 [2023-11-29 00:03:08,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-11-29 00:03:08,345 INFO L413 NwaCegarLoop]: 661 mSDtfsCounter, 5778 mSDsluCounter, 4158 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5778 SdHoareTripleChecker+Valid, 4819 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:08,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5778 Valid, 4819 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 00:03:08,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2023-11-29 00:03:08,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 5081. [2023-11-29 00:03:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5081 states, 4208 states have (on average 1.4940589353612168) internal successors, (6287), 4212 states have internal predecessors, (6287), 780 states have call successors, (780), 92 states have call predecessors, (780), 92 states have return successors, (780), 776 states have call predecessors, (780), 780 states have call successors, (780) [2023-11-29 00:03:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5081 states to 5081 states and 7847 transitions. [2023-11-29 00:03:08,821 INFO L78 Accepts]: Start accepts. Automaton has 5081 states and 7847 transitions. Word has length 480 [2023-11-29 00:03:08,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:08,822 INFO L495 AbstractCegarLoop]: Abstraction has 5081 states and 7847 transitions. [2023-11-29 00:03:08,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:03:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 5081 states and 7847 transitions. [2023-11-29 00:03:08,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2023-11-29 00:03:08,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:08,829 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:08,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:03:09,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:09,029 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:09,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:09,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1337403199, now seen corresponding path program 1 times [2023-11-29 00:03:09,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:09,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843588973] [2023-11-29 00:03:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:09,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:09,084 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:09,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360226809] [2023-11-29 00:03:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:09,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:09,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:09,085 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:09,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:03:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:09,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:03:09,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4023 proven. 63 refuted. 0 times theorem prover too weak. 5026 trivial. 0 not checked. [2023-11-29 00:03:09,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 138 proven. 63 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 00:03:10,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:10,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843588973] [2023-11-29 00:03:10,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:10,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360226809] [2023-11-29 00:03:10,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360226809] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:10,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:03:10,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:03:10,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649197557] [2023-11-29 00:03:10,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:10,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:03:10,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:10,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:03:10,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:03:10,078 INFO L87 Difference]: Start difference. First operand 5081 states and 7847 transitions. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2023-11-29 00:03:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:10,776 INFO L93 Difference]: Finished difference Result 7582 states and 11645 transitions. [2023-11-29 00:03:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:03:10,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) Word has length 480 [2023-11-29 00:03:10,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:10,786 INFO L225 Difference]: With dead ends: 7582 [2023-11-29 00:03:10,786 INFO L226 Difference]: Without dead ends: 3299 [2023-11-29 00:03:10,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 952 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:03:10,796 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 978 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:10,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 1089 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:03:10,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3299 states. [2023-11-29 00:03:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3299 to 3226. [2023-11-29 00:03:11,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 2652 states have (on average 1.4803921568627452) internal successors, (3926), 2656 states have internal predecessors, (3926), 508 states have call successors, (508), 65 states have call predecessors, (508), 65 states have return successors, (508), 504 states have call predecessors, (508), 508 states have call successors, (508) [2023-11-29 00:03:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 4942 transitions. [2023-11-29 00:03:11,137 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 4942 transitions. Word has length 480 [2023-11-29 00:03:11,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:11,138 INFO L495 AbstractCegarLoop]: Abstraction has 3226 states and 4942 transitions. [2023-11-29 00:03:11,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2023-11-29 00:03:11,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 4942 transitions. [2023-11-29 00:03:11,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2023-11-29 00:03:11,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:11,144 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:11,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:03:11,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:03:11,344 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:11,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:11,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2139055400, now seen corresponding path program 1 times [2023-11-29 00:03:11,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:11,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595115472] [2023-11-29 00:03:11,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:11,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:11,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:11,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16878265] [2023-11-29 00:03:11,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:11,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:11,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:11,405 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:11,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:03:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:11,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:03:11,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 67 proven. 201 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 00:03:12,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 00:03:12,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:12,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595115472] [2023-11-29 00:03:12,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:12,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16878265] [2023-11-29 00:03:12,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16878265] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:12,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:03:12,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 00:03:12,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596348499] [2023-11-29 00:03:12,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:12,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:03:12,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:12,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:03:12,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:03:12,962 INFO L87 Difference]: Start difference. First operand 3226 states and 4942 transitions. Second operand has 10 states, 10 states have (on average 25.4) internal successors, (254), 10 states have internal predecessors, (254), 3 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 3 states have call successors, (136) [2023-11-29 00:03:13,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:13,718 INFO L93 Difference]: Finished difference Result 6703 states and 10243 transitions. [2023-11-29 00:03:13,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:03:13,719 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 25.4) internal successors, (254), 10 states have internal predecessors, (254), 3 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 3 states have call successors, (136) Word has length 481 [2023-11-29 00:03:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:13,728 INFO L225 Difference]: With dead ends: 6703 [2023-11-29 00:03:13,728 INFO L226 Difference]: Without dead ends: 3964 [2023-11-29 00:03:13,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 964 GetRequests, 952 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:03:13,733 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 432 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 2070 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:13,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 2070 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:03:13,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3964 states. [2023-11-29 00:03:14,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3964 to 3338. [2023-11-29 00:03:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 2764 states have (on average 1.4768451519536903) internal successors, (4082), 2768 states have internal predecessors, (4082), 508 states have call successors, (508), 65 states have call predecessors, (508), 65 states have return successors, (508), 504 states have call predecessors, (508), 508 states have call successors, (508) [2023-11-29 00:03:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 5098 transitions. [2023-11-29 00:03:14,045 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 5098 transitions. Word has length 481 [2023-11-29 00:03:14,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:14,045 INFO L495 AbstractCegarLoop]: Abstraction has 3338 states and 5098 transitions. [2023-11-29 00:03:14,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.4) internal successors, (254), 10 states have internal predecessors, (254), 3 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 3 states have call successors, (136) [2023-11-29 00:03:14,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 5098 transitions. [2023-11-29 00:03:14,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-11-29 00:03:14,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:14,051 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:14,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:03:14,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:03:14,252 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:14,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:14,252 INFO L85 PathProgramCache]: Analyzing trace with hash 692206680, now seen corresponding path program 1 times [2023-11-29 00:03:14,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:14,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816578027] [2023-11-29 00:03:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:14,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:14,311 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:14,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855539338] [2023-11-29 00:03:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:14,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:14,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:14,313 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:14,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:03:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:14,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:03:14,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 3595 proven. 201 refuted. 0 times theorem prover too weak. 5316 trivial. 0 not checked. [2023-11-29 00:03:16,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 00:03:17,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:17,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816578027] [2023-11-29 00:03:17,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:17,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855539338] [2023-11-29 00:03:17,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855539338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:17,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:03:17,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 00:03:17,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291838068] [2023-11-29 00:03:17,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:17,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:03:17,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:17,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:03:17,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:03:17,311 INFO L87 Difference]: Start difference. First operand 3338 states and 5098 transitions. Second operand has 12 states, 12 states have (on average 21.583333333333332) internal successors, (259), 12 states have internal predecessors, (259), 5 states have call successors, (135), 3 states have call predecessors, (135), 5 states have return successors, (136), 4 states have call predecessors, (136), 5 states have call successors, (136) [2023-11-29 00:03:20,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:03:23,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:03:24,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:24,203 INFO L93 Difference]: Finished difference Result 6653 states and 10140 transitions. [2023-11-29 00:03:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:03:24,204 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.583333333333332) internal successors, (259), 12 states have internal predecessors, (259), 5 states have call successors, (135), 3 states have call predecessors, (135), 5 states have return successors, (136), 4 states have call predecessors, (136), 5 states have call successors, (136) Word has length 482 [2023-11-29 00:03:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:24,211 INFO L225 Difference]: With dead ends: 6653 [2023-11-29 00:03:24,211 INFO L226 Difference]: Without dead ends: 3964 [2023-11-29 00:03:24,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 972 GetRequests, 953 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:03:24,218 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 1078 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 1982 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:24,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1078 Valid, 1982 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-11-29 00:03:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3964 states. [2023-11-29 00:03:24,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3964 to 3226. [2023-11-29 00:03:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 2652 states have (on average 1.4743589743589745) internal successors, (3910), 2656 states have internal predecessors, (3910), 508 states have call successors, (508), 65 states have call predecessors, (508), 65 states have return successors, (508), 504 states have call predecessors, (508), 508 states have call successors, (508) [2023-11-29 00:03:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 4926 transitions. [2023-11-29 00:03:24,463 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 4926 transitions. Word has length 482 [2023-11-29 00:03:24,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:24,464 INFO L495 AbstractCegarLoop]: Abstraction has 3226 states and 4926 transitions. [2023-11-29 00:03:24,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.583333333333332) internal successors, (259), 12 states have internal predecessors, (259), 5 states have call successors, (135), 3 states have call predecessors, (135), 5 states have return successors, (136), 4 states have call predecessors, (136), 5 states have call successors, (136) [2023-11-29 00:03:24,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 4926 transitions. [2023-11-29 00:03:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-11-29 00:03:24,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:24,468 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:24,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:03:24,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:03:24,669 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:24,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:24,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1532404194, now seen corresponding path program 1 times [2023-11-29 00:03:24,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:24,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611640907] [2023-11-29 00:03:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:24,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:24,721 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:24,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032868388] [2023-11-29 00:03:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:24,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:24,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:24,723 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:24,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:03:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:25,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:03:25,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 591 proven. 195 refuted. 0 times theorem prover too weak. 8326 trivial. 0 not checked. [2023-11-29 00:03:26,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 6 proven. 195 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 00:03:27,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:27,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611640907] [2023-11-29 00:03:27,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:27,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032868388] [2023-11-29 00:03:27,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032868388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:27,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:03:27,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-29 00:03:27,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319599517] [2023-11-29 00:03:27,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:27,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:03:27,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:27,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:03:27,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:03:27,064 INFO L87 Difference]: Start difference. First operand 3226 states and 4926 transitions. Second operand has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-29 00:03:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:27,750 INFO L93 Difference]: Finished difference Result 5951 states and 9028 transitions. [2023-11-29 00:03:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:03:27,752 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) Word has length 482 [2023-11-29 00:03:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:27,756 INFO L225 Difference]: With dead ends: 5951 [2023-11-29 00:03:27,756 INFO L226 Difference]: Without dead ends: 3326 [2023-11-29 00:03:27,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 971 GetRequests, 954 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:03:27,760 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 593 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:27,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 1070 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:03:27,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2023-11-29 00:03:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 3262. [2023-11-29 00:03:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 2679 states have (on average 1.4643523702874206) internal successors, (3923), 2683 states have internal predecessors, (3923), 508 states have call successors, (508), 74 states have call predecessors, (508), 74 states have return successors, (508), 504 states have call predecessors, (508), 508 states have call successors, (508) [2023-11-29 00:03:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 4939 transitions. [2023-11-29 00:03:28,020 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 4939 transitions. Word has length 482 [2023-11-29 00:03:28,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:28,021 INFO L495 AbstractCegarLoop]: Abstraction has 3262 states and 4939 transitions. [2023-11-29 00:03:28,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-29 00:03:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 4939 transitions. [2023-11-29 00:03:28,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-11-29 00:03:28,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:28,025 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:28,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:03:28,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:03:28,225 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:28,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:28,226 INFO L85 PathProgramCache]: Analyzing trace with hash 957124768, now seen corresponding path program 1 times [2023-11-29 00:03:28,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:28,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843888972] [2023-11-29 00:03:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:28,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:28,282 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:28,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043984285] [2023-11-29 00:03:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:28,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:28,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:28,284 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:28,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:03:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:28,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:03:28,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 591 proven. 195 refuted. 0 times theorem prover too weak. 8326 trivial. 0 not checked. [2023-11-29 00:03:29,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:31,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:31,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843888972] [2023-11-29 00:03:31,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:31,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043984285] [2023-11-29 00:03:31,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043984285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:03:31,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:03:31,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-11-29 00:03:31,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784579596] [2023-11-29 00:03:31,880 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:31,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:03:31,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:31,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:03:31,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:03:31,882 INFO L87 Difference]: Start difference. First operand 3262 states and 4939 transitions. Second operand has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 2 states have call successors, (68), 2 states have call predecessors, (68), 3 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) [2023-11-29 00:03:33,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:33,311 INFO L93 Difference]: Finished difference Result 6362 states and 9600 transitions. [2023-11-29 00:03:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:03:33,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 2 states have call successors, (68), 2 states have call predecessors, (68), 3 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) Word has length 482 [2023-11-29 00:03:33,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:33,317 INFO L225 Difference]: With dead ends: 6362 [2023-11-29 00:03:33,317 INFO L226 Difference]: Without dead ends: 3326 [2023-11-29 00:03:33,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:03:33,320 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 442 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:33,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 1350 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:03:33,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2023-11-29 00:03:33,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 3262. [2023-11-29 00:03:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 2679 states have (on average 1.4602463605823068) internal successors, (3912), 2683 states have internal predecessors, (3912), 508 states have call successors, (508), 74 states have call predecessors, (508), 74 states have return successors, (508), 504 states have call predecessors, (508), 508 states have call successors, (508) [2023-11-29 00:03:33,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 4928 transitions. [2023-11-29 00:03:33,559 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 4928 transitions. Word has length 482 [2023-11-29 00:03:33,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:33,559 INFO L495 AbstractCegarLoop]: Abstraction has 3262 states and 4928 transitions. [2023-11-29 00:03:33,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 2 states have call successors, (68), 2 states have call predecessors, (68), 3 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) [2023-11-29 00:03:33,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 4928 transitions. [2023-11-29 00:03:33,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2023-11-29 00:03:33,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:33,563 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:33,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:03:33,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:33,764 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:33,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:33,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1071575351, now seen corresponding path program 1 times [2023-11-29 00:03:33,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:33,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740561106] [2023-11-29 00:03:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:33,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:33,816 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:33,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741231030] [2023-11-29 00:03:33,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:33,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:33,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:33,818 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:33,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:03:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:34,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:03:34,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:03:36,577 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:03:36,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:36,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740561106] [2023-11-29 00:03:36,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:36,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741231030] [2023-11-29 00:03:36,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741231030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:03:36,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:03:36,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:03:36,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590299253] [2023-11-29 00:03:36,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:03:36,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:03:36,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:36,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:03:36,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:03:36,579 INFO L87 Difference]: Start difference. First operand 3262 states and 4928 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:03:37,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:37,494 INFO L93 Difference]: Finished difference Result 7823 states and 11861 transitions. [2023-11-29 00:03:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:03:37,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 483 [2023-11-29 00:03:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:37,500 INFO L225 Difference]: With dead ends: 7823 [2023-11-29 00:03:37,500 INFO L226 Difference]: Without dead ends: 4846 [2023-11-29 00:03:37,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:03:37,505 INFO L413 NwaCegarLoop]: 788 mSDtfsCounter, 842 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 2287 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:37,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 2287 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:03:37,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4846 states. [2023-11-29 00:03:37,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4846 to 3371. [2023-11-29 00:03:37,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3371 states, 2788 states have (on average 1.4601865136298422) internal successors, (4071), 2792 states have internal predecessors, (4071), 508 states have call successors, (508), 74 states have call predecessors, (508), 74 states have return successors, (508), 504 states have call predecessors, (508), 508 states have call successors, (508) [2023-11-29 00:03:37,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3371 states to 3371 states and 5087 transitions. [2023-11-29 00:03:37,784 INFO L78 Accepts]: Start accepts. Automaton has 3371 states and 5087 transitions. Word has length 483 [2023-11-29 00:03:37,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:37,784 INFO L495 AbstractCegarLoop]: Abstraction has 3371 states and 5087 transitions. [2023-11-29 00:03:37,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:03:37,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3371 states and 5087 transitions. [2023-11-29 00:03:37,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2023-11-29 00:03:37,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:37,788 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:37,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-29 00:03:37,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:37,989 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:37,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:37,990 INFO L85 PathProgramCache]: Analyzing trace with hash 14844149, now seen corresponding path program 1 times [2023-11-29 00:03:37,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:37,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336711052] [2023-11-29 00:03:37,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:37,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:38,045 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:38,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708262616] [2023-11-29 00:03:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:38,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:38,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:38,047 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:38,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:03:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:38,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:03:38,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:03:41,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:03:41,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:41,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336711052] [2023-11-29 00:03:41,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:41,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708262616] [2023-11-29 00:03:41,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708262616] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:03:41,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:03:41,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:03:41,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860023303] [2023-11-29 00:03:41,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:03:41,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:03:41,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:41,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:03:41,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:03:41,322 INFO L87 Difference]: Start difference. First operand 3371 states and 5087 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:03:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:43,894 INFO L93 Difference]: Finished difference Result 13343 states and 20169 transitions. [2023-11-29 00:03:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:03:43,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 483 [2023-11-29 00:03:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:43,907 INFO L225 Difference]: With dead ends: 13343 [2023-11-29 00:03:43,907 INFO L226 Difference]: Without dead ends: 10640 [2023-11-29 00:03:43,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:03:43,912 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 2725 mSDsluCounter, 3605 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2725 SdHoareTripleChecker+Valid, 4310 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:43,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2725 Valid, 4310 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 00:03:43,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10640 states. [2023-11-29 00:03:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10640 to 6550. [2023-11-29 00:03:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6550 states, 5463 states have (on average 1.461651107450119) internal successors, (7985), 5471 states have internal predecessors, (7985), 948 states have call successors, (948), 138 states have call predecessors, (948), 138 states have return successors, (948), 940 states have call predecessors, (948), 948 states have call successors, (948) [2023-11-29 00:03:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6550 states to 6550 states and 9881 transitions. [2023-11-29 00:03:44,532 INFO L78 Accepts]: Start accepts. Automaton has 6550 states and 9881 transitions. Word has length 483 [2023-11-29 00:03:44,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:44,533 INFO L495 AbstractCegarLoop]: Abstraction has 6550 states and 9881 transitions. [2023-11-29 00:03:44,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:03:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 6550 states and 9881 transitions. [2023-11-29 00:03:44,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2023-11-29 00:03:44,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:44,538 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:44,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 00:03:44,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:44,739 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:44,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:44,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1408249316, now seen corresponding path program 1 times [2023-11-29 00:03:44,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:44,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078500903] [2023-11-29 00:03:44,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:44,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:44,799 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:44,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118770537] [2023-11-29 00:03:44,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:44,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:44,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:44,801 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:44,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 00:03:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:45,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 00:03:45,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 1148 proven. 372 refuted. 0 times theorem prover too weak. 7592 trivial. 0 not checked. [2023-11-29 00:03:48,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 12 proven. 189 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 00:03:49,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:49,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078500903] [2023-11-29 00:03:49,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:49,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118770537] [2023-11-29 00:03:49,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118770537] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:49,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:03:49,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 16 [2023-11-29 00:03:49,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573761135] [2023-11-29 00:03:49,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:49,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:03:49,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:49,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:03:49,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:03:49,035 INFO L87 Difference]: Start difference. First operand 6550 states and 9881 transitions. Second operand has 16 states, 16 states have (on average 16.25) internal successors, (260), 15 states have internal predecessors, (260), 5 states have call successors, (136), 4 states have call predecessors, (136), 6 states have return successors, (136), 5 states have call predecessors, (136), 5 states have call successors, (136) [2023-11-29 00:03:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:54,293 INFO L93 Difference]: Finished difference Result 22551 states and 33646 transitions. [2023-11-29 00:03:54,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 00:03:54,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 16.25) internal successors, (260), 15 states have internal predecessors, (260), 5 states have call successors, (136), 4 states have call predecessors, (136), 6 states have return successors, (136), 5 states have call predecessors, (136), 5 states have call successors, (136) Word has length 483 [2023-11-29 00:03:54,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:54,320 INFO L225 Difference]: With dead ends: 22551 [2023-11-29 00:03:54,321 INFO L226 Difference]: Without dead ends: 16927 [2023-11-29 00:03:54,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 988 GetRequests, 954 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 00:03:54,330 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 3032 mSDsluCounter, 4186 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3038 SdHoareTripleChecker+Valid, 4898 SdHoareTripleChecker+Invalid, 2703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:54,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3038 Valid, 4898 Invalid, 2703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 2058 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-29 00:03:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16927 states. [2023-11-29 00:03:55,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16927 to 12551. [2023-11-29 00:03:55,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12551 states, 10906 states have (on average 1.4675408032275812) internal successors, (16005), 10938 states have internal predecessors, (16005), 1388 states have call successors, (1388), 256 states have call predecessors, (1388), 256 states have return successors, (1388), 1356 states have call predecessors, (1388), 1388 states have call successors, (1388) [2023-11-29 00:03:55,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12551 states to 12551 states and 18781 transitions. [2023-11-29 00:03:55,432 INFO L78 Accepts]: Start accepts. Automaton has 12551 states and 18781 transitions. Word has length 483 [2023-11-29 00:03:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:03:55,433 INFO L495 AbstractCegarLoop]: Abstraction has 12551 states and 18781 transitions. [2023-11-29 00:03:55,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.25) internal successors, (260), 15 states have internal predecessors, (260), 5 states have call successors, (136), 4 states have call predecessors, (136), 6 states have return successors, (136), 5 states have call predecessors, (136), 5 states have call successors, (136) [2023-11-29 00:03:55,433 INFO L276 IsEmpty]: Start isEmpty. Operand 12551 states and 18781 transitions. [2023-11-29 00:03:55,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2023-11-29 00:03:55,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:03:55,441 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:03:55,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 00:03:55,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 00:03:55,642 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:03:55,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:55,643 INFO L85 PathProgramCache]: Analyzing trace with hash 198833879, now seen corresponding path program 1 times [2023-11-29 00:03:55,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:55,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129706874] [2023-11-29 00:03:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:55,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:55,700 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:03:55,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711665525] [2023-11-29 00:03:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:55,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:55,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:55,701 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:55,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 00:03:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:56,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 1275 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:03:56,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 2901 proven. 162 refuted. 0 times theorem prover too weak. 6049 trivial. 0 not checked. [2023-11-29 00:03:56,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 39 proven. 162 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 00:03:56,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:56,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129706874] [2023-11-29 00:03:56,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:03:56,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711665525] [2023-11-29 00:03:56,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711665525] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:56,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:03:56,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 00:03:56,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723137196] [2023-11-29 00:03:56,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:56,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:03:56,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:56,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:03:56,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:03:56,883 INFO L87 Difference]: Start difference. First operand 12551 states and 18781 transitions. Second operand has 10 states, 10 states have (on average 24.7) internal successors, (247), 10 states have internal predecessors, (247), 3 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 3 states have call predecessors, (123), 3 states have call successors, (123) [2023-11-29 00:03:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:03:59,785 INFO L93 Difference]: Finished difference Result 28288 states and 42120 transitions. [2023-11-29 00:03:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:03:59,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 24.7) internal successors, (247), 10 states have internal predecessors, (247), 3 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 3 states have call predecessors, (123), 3 states have call successors, (123) Word has length 485 [2023-11-29 00:03:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:03:59,806 INFO L225 Difference]: With dead ends: 28288 [2023-11-29 00:03:59,806 INFO L226 Difference]: Without dead ends: 19998 [2023-11-29 00:03:59,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 961 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:03:59,813 INFO L413 NwaCegarLoop]: 780 mSDtfsCounter, 939 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:03:59,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [953 Valid, 2828 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 00:03:59,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19998 states. [2023-11-29 00:04:00,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19998 to 13402. [2023-11-29 00:04:00,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13402 states, 11728 states have (on average 1.4662346521145975) internal successors, (17196), 11760 states have internal predecessors, (17196), 1388 states have call successors, (1388), 285 states have call predecessors, (1388), 285 states have return successors, (1388), 1356 states have call predecessors, (1388), 1388 states have call successors, (1388) [2023-11-29 00:04:00,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13402 states to 13402 states and 19972 transitions. [2023-11-29 00:04:00,917 INFO L78 Accepts]: Start accepts. Automaton has 13402 states and 19972 transitions. Word has length 485 [2023-11-29 00:04:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:04:00,918 INFO L495 AbstractCegarLoop]: Abstraction has 13402 states and 19972 transitions. [2023-11-29 00:04:00,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.7) internal successors, (247), 10 states have internal predecessors, (247), 3 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 3 states have call predecessors, (123), 3 states have call successors, (123) [2023-11-29 00:04:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 13402 states and 19972 transitions. [2023-11-29 00:04:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2023-11-29 00:04:00,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:04:00,927 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:04:00,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 00:04:01,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 00:04:01,128 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:04:01,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:04:01,128 INFO L85 PathProgramCache]: Analyzing trace with hash -199398679, now seen corresponding path program 1 times [2023-11-29 00:04:01,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:04:01,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579528104] [2023-11-29 00:04:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:04:01,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:04:01,179 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:04:01,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622423679] [2023-11-29 00:04:01,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:04:01,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:04:01,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:04:01,181 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:04:01,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 00:04:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:04:01,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 00:04:01,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:04:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 966 proven. 567 refuted. 0 times theorem prover too weak. 7579 trivial. 0 not checked. [2023-11-29 00:04:03,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:04:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 12 proven. 387 refuted. 0 times theorem prover too weak. 8713 trivial. 0 not checked. [2023-11-29 00:04:04,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:04:04,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579528104] [2023-11-29 00:04:04,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:04:04,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622423679] [2023-11-29 00:04:04,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622423679] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:04:04,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:04:04,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-11-29 00:04:04,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183681222] [2023-11-29 00:04:04,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:04:04,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:04:04,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:04:04,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:04:04,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:04:04,127 INFO L87 Difference]: Start difference. First operand 13402 states and 19972 transitions. Second operand has 19 states, 18 states have (on average 14.88888888888889) internal successors, (268), 17 states have internal predecessors, (268), 6 states have call successors, (135), 4 states have call predecessors, (135), 8 states have return successors, (136), 5 states have call predecessors, (136), 6 states have call successors, (136) [2023-11-29 00:04:06,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:04:06,185 INFO L93 Difference]: Finished difference Result 26934 states and 39929 transitions. [2023-11-29 00:04:06,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 00:04:06,186 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 14.88888888888889) internal successors, (268), 17 states have internal predecessors, (268), 6 states have call successors, (135), 4 states have call predecessors, (135), 8 states have return successors, (136), 5 states have call predecessors, (136), 6 states have call successors, (136) Word has length 485 [2023-11-29 00:04:06,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:04:06,207 INFO L225 Difference]: With dead ends: 26934 [2023-11-29 00:04:06,207 INFO L226 Difference]: Without dead ends: 16504 [2023-11-29 00:04:06,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 952 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:04:06,219 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 3159 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3159 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:04:06,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3159 Valid, 1613 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:04:06,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16504 states. [2023-11-29 00:04:07,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16504 to 14842. [2023-11-29 00:04:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14842 states, 13219 states have (on average 1.4672062939707997) internal successors, (19395), 13251 states have internal predecessors, (19395), 1308 states have call successors, (1308), 314 states have call predecessors, (1308), 314 states have return successors, (1308), 1276 states have call predecessors, (1308), 1308 states have call successors, (1308) [2023-11-29 00:04:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14842 states to 14842 states and 22011 transitions. [2023-11-29 00:04:07,376 INFO L78 Accepts]: Start accepts. Automaton has 14842 states and 22011 transitions. Word has length 485 [2023-11-29 00:04:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:04:07,376 INFO L495 AbstractCegarLoop]: Abstraction has 14842 states and 22011 transitions. [2023-11-29 00:04:07,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 14.88888888888889) internal successors, (268), 17 states have internal predecessors, (268), 6 states have call successors, (135), 4 states have call predecessors, (135), 8 states have return successors, (136), 5 states have call predecessors, (136), 6 states have call successors, (136) [2023-11-29 00:04:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 14842 states and 22011 transitions. [2023-11-29 00:04:07,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2023-11-29 00:04:07,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:04:07,385 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:04:07,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 00:04:07,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 00:04:07,586 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:04:07,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:04:07,587 INFO L85 PathProgramCache]: Analyzing trace with hash 694087659, now seen corresponding path program 1 times [2023-11-29 00:04:07,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:04:07,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589368728] [2023-11-29 00:04:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:04:07,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:04:07,643 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:04:07,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780541248] [2023-11-29 00:04:07,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:04:07,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:04:07,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:04:07,644 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:04:07,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 00:04:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:04:08,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:04:08,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:04:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:04:10,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:04:10,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:04:10,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589368728] [2023-11-29 00:04:10,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:04:10,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780541248] [2023-11-29 00:04:10,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780541248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:04:10,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:04:10,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:04:10,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601797503] [2023-11-29 00:04:10,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:04:10,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:04:10,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:04:10,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:04:10,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:04:10,080 INFO L87 Difference]: Start difference. First operand 14842 states and 22011 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:04:13,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:04:13,210 INFO L93 Difference]: Finished difference Result 29571 states and 43978 transitions. [2023-11-29 00:04:13,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:04:13,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 485 [2023-11-29 00:04:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:04:13,241 INFO L225 Difference]: With dead ends: 29571 [2023-11-29 00:04:13,241 INFO L226 Difference]: Without dead ends: 24257 [2023-11-29 00:04:13,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:04:13,251 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 1863 mSDsluCounter, 2882 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1863 SdHoareTripleChecker+Valid, 3526 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:04:13,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1863 Valid, 3526 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 00:04:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24257 states. [2023-11-29 00:04:14,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24257 to 14809. [2023-11-29 00:04:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14809 states, 13186 states have (on average 1.4672379796754134) internal successors, (19347), 13218 states have internal predecessors, (19347), 1308 states have call successors, (1308), 314 states have call predecessors, (1308), 314 states have return successors, (1308), 1276 states have call predecessors, (1308), 1308 states have call successors, (1308) [2023-11-29 00:04:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14809 states to 14809 states and 21963 transitions. [2023-11-29 00:04:14,496 INFO L78 Accepts]: Start accepts. Automaton has 14809 states and 21963 transitions. Word has length 485 [2023-11-29 00:04:14,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:04:14,497 INFO L495 AbstractCegarLoop]: Abstraction has 14809 states and 21963 transitions. [2023-11-29 00:04:14,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:04:14,497 INFO L276 IsEmpty]: Start isEmpty. Operand 14809 states and 21963 transitions. [2023-11-29 00:04:14,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2023-11-29 00:04:14,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:04:14,511 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:04:14,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 00:04:14,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 00:04:14,711 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:04:14,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:04:14,712 INFO L85 PathProgramCache]: Analyzing trace with hash 699200706, now seen corresponding path program 1 times [2023-11-29 00:04:14,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:04:14,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815510641] [2023-11-29 00:04:14,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:04:14,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:04:14,764 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:04:14,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126210824] [2023-11-29 00:04:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:04:14,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:04:14,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:04:14,766 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:04:14,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 00:04:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:04:15,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 00:04:15,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:04:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 5317 proven. 81 refuted. 0 times theorem prover too weak. 3714 trivial. 0 not checked. [2023-11-29 00:04:17,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:04:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:04:19,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:04:19,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815510641] [2023-11-29 00:04:19,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:04:19,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126210824] [2023-11-29 00:04:19,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126210824] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:04:19,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:04:19,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 17 [2023-11-29 00:04:19,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814576590] [2023-11-29 00:04:19,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:04:19,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 00:04:19,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:04:19,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 00:04:19,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:04:19,049 INFO L87 Difference]: Start difference. First operand 14809 states and 21963 transitions. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 2 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) [2023-11-29 00:04:32,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:04:32,880 INFO L93 Difference]: Finished difference Result 112127 states and 166943 transitions. [2023-11-29 00:04:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 00:04:32,880 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 2 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) Word has length 486 [2023-11-29 00:04:32,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:04:33,014 INFO L225 Difference]: With dead ends: 112127 [2023-11-29 00:04:33,014 INFO L226 Difference]: Without dead ends: 100897 [2023-11-29 00:04:33,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1008 GetRequests, 964 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=449, Invalid=1621, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 00:04:33,037 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 2497 mSDsluCounter, 6679 mSDsCounter, 0 mSdLazyCounter, 2795 mSolverCounterSat, 698 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2497 SdHoareTripleChecker+Valid, 7512 SdHoareTripleChecker+Invalid, 3493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 698 IncrementalHoareTripleChecker+Valid, 2795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:04:33,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2497 Valid, 7512 Invalid, 3493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [698 Valid, 2795 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2023-11-29 00:04:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100897 states. [2023-11-29 00:04:38,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100897 to 56655. [2023-11-29 00:04:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56655 states, 51411 states have (on average 1.4608741319950984) internal successors, (75105), 51555 states have internal predecessors, (75105), 4084 states have call successors, (4084), 1159 states have call predecessors, (4084), 1159 states have return successors, (4084), 3940 states have call predecessors, (4084), 4084 states have call successors, (4084) [2023-11-29 00:04:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56655 states to 56655 states and 83273 transitions. [2023-11-29 00:04:38,206 INFO L78 Accepts]: Start accepts. Automaton has 56655 states and 83273 transitions. Word has length 486 [2023-11-29 00:04:38,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:04:38,207 INFO L495 AbstractCegarLoop]: Abstraction has 56655 states and 83273 transitions. [2023-11-29 00:04:38,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 2 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) [2023-11-29 00:04:38,207 INFO L276 IsEmpty]: Start isEmpty. Operand 56655 states and 83273 transitions. [2023-11-29 00:04:38,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2023-11-29 00:04:38,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:04:38,235 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:04:38,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 00:04:38,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 00:04:38,436 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:04:38,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:04:38,436 INFO L85 PathProgramCache]: Analyzing trace with hash 839749316, now seen corresponding path program 1 times [2023-11-29 00:04:38,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:04:38,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553139617] [2023-11-29 00:04:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:04:38,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:04:38,489 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:04:38,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290872545] [2023-11-29 00:04:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:04:38,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:04:38,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:04:38,490 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:04:38,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 00:04:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:04:39,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:04:39,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:04:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:04:40,447 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:04:40,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:04:40,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553139617] [2023-11-29 00:04:40,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:04:40,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290872545] [2023-11-29 00:04:40,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290872545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:04:40,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:04:40,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:04:40,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499724000] [2023-11-29 00:04:40,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:04:40,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:04:40,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:04:40,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:04:40,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:04:40,450 INFO L87 Difference]: Start difference. First operand 56655 states and 83273 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:04:43,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:04:43,290 INFO L93 Difference]: Finished difference Result 83763 states and 123939 transitions. [2023-11-29 00:04:43,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:04:43,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 486 [2023-11-29 00:04:43,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:04:43,332 INFO L225 Difference]: With dead ends: 83763 [2023-11-29 00:04:43,332 INFO L226 Difference]: Without dead ends: 33523 [2023-11-29 00:04:43,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 483 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 00:04:43,365 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 661 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:04:43,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 1628 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:04:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33523 states. [2023-11-29 00:04:46,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33523 to 28067. [2023-11-29 00:04:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28067 states, 24903 states have (on average 1.4669718507810303) internal successors, (36532), 24967 states have internal predecessors, (36532), 2548 states have call successors, (2548), 615 states have call predecessors, (2548), 615 states have return successors, (2548), 2484 states have call predecessors, (2548), 2548 states have call successors, (2548) [2023-11-29 00:04:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28067 states to 28067 states and 41628 transitions. [2023-11-29 00:04:46,399 INFO L78 Accepts]: Start accepts. Automaton has 28067 states and 41628 transitions. Word has length 486 [2023-11-29 00:04:46,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:04:46,399 INFO L495 AbstractCegarLoop]: Abstraction has 28067 states and 41628 transitions. [2023-11-29 00:04:46,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:04:46,400 INFO L276 IsEmpty]: Start isEmpty. Operand 28067 states and 41628 transitions. [2023-11-29 00:04:46,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2023-11-29 00:04:46,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:04:46,411 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:04:46,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 00:04:46,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 00:04:46,612 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:04:46,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:04:46,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1730241604, now seen corresponding path program 1 times [2023-11-29 00:04:46,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:04:46,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280713303] [2023-11-29 00:04:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:04:46,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:04:46,663 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:04:46,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114080984] [2023-11-29 00:04:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:04:46,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:04:46,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:04:46,664 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:04:46,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 00:04:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:04:47,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:04:47,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:04:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:04:48,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:04:48,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:04:48,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280713303] [2023-11-29 00:04:48,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:04:48,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114080984] [2023-11-29 00:04:48,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114080984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:04:48,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:04:48,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:04:48,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290403187] [2023-11-29 00:04:48,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:04:48,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:04:48,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:04:48,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:04:48,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:04:48,307 INFO L87 Difference]: Start difference. First operand 28067 states and 41628 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:04:53,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:04:53,085 INFO L93 Difference]: Finished difference Result 82547 states and 122426 transitions. [2023-11-29 00:04:53,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:04:53,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 486 [2023-11-29 00:04:53,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:04:53,161 INFO L225 Difference]: With dead ends: 82547 [2023-11-29 00:04:53,161 INFO L226 Difference]: Without dead ends: 55813 [2023-11-29 00:04:53,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 483 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 00:04:53,187 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 610 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:04:53,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 1412 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:04:53,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55813 states. [2023-11-29 00:04:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55813 to 55683. [2023-11-29 00:04:58,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55683 states, 49439 states have (on average 1.4626104896943708) internal successors, (72310), 49567 states have internal predecessors, (72310), 5028 states have call successors, (5028), 1215 states have call predecessors, (5028), 1215 states have return successors, (5028), 4900 states have call predecessors, (5028), 5028 states have call successors, (5028) [2023-11-29 00:04:58,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55683 states to 55683 states and 82366 transitions. [2023-11-29 00:04:58,445 INFO L78 Accepts]: Start accepts. Automaton has 55683 states and 82366 transitions. Word has length 486 [2023-11-29 00:04:58,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:04:58,446 INFO L495 AbstractCegarLoop]: Abstraction has 55683 states and 82366 transitions. [2023-11-29 00:04:58,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:04:58,446 INFO L276 IsEmpty]: Start isEmpty. Operand 55683 states and 82366 transitions. [2023-11-29 00:04:58,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2023-11-29 00:04:58,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:04:58,467 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:04:58,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-29 00:04:58,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 00:04:58,668 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:04:58,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:04:58,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1492005021, now seen corresponding path program 1 times [2023-11-29 00:04:58,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:04:58,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393196118] [2023-11-29 00:04:58,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:04:58,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:04:58,720 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:04:58,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622599400] [2023-11-29 00:04:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:04:58,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:04:58,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:04:58,722 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:04:58,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 00:04:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:04:59,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:04:59,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:04:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:04:59,601 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:04:59,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:04:59,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393196118] [2023-11-29 00:04:59,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:04:59,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622599400] [2023-11-29 00:04:59,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622599400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:04:59,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:04:59,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:04:59,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137277531] [2023-11-29 00:04:59,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:04:59,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:04:59,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:04:59,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:04:59,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:04:59,603 INFO L87 Difference]: Start difference. First operand 55683 states and 82366 transitions. Second operand has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:05:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:05:07,391 INFO L93 Difference]: Finished difference Result 124411 states and 184322 transitions. [2023-11-29 00:05:07,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:05:07,391 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 486 [2023-11-29 00:05:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:05:07,566 INFO L225 Difference]: With dead ends: 124411 [2023-11-29 00:05:07,566 INFO L226 Difference]: Without dead ends: 82257 [2023-11-29 00:05:07,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:05:07,597 INFO L413 NwaCegarLoop]: 916 mSDtfsCounter, 1616 mSDsluCounter, 2731 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1616 SdHoareTripleChecker+Valid, 3647 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:05:07,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1616 Valid, 3647 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:05:07,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82257 states. [2023-11-29 00:05:12,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82257 to 55755. [2023-11-29 00:05:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55755 states, 49511 states have (on average 1.4619377512068026) internal successors, (72382), 49639 states have internal predecessors, (72382), 5028 states have call successors, (5028), 1215 states have call predecessors, (5028), 1215 states have return successors, (5028), 4900 states have call predecessors, (5028), 5028 states have call successors, (5028) [2023-11-29 00:05:13,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55755 states to 55755 states and 82438 transitions. [2023-11-29 00:05:13,033 INFO L78 Accepts]: Start accepts. Automaton has 55755 states and 82438 transitions. Word has length 486 [2023-11-29 00:05:13,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:05:13,034 INFO L495 AbstractCegarLoop]: Abstraction has 55755 states and 82438 transitions. [2023-11-29 00:05:13,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:05:13,034 INFO L276 IsEmpty]: Start isEmpty. Operand 55755 states and 82438 transitions. [2023-11-29 00:05:13,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2023-11-29 00:05:13,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:05:13,063 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:13,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-29 00:05:13,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 00:05:13,264 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:05:13,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:13,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1014687969, now seen corresponding path program 1 times [2023-11-29 00:05:13,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:13,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024925573] [2023-11-29 00:05:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:13,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:13,320 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:05:13,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783818909] [2023-11-29 00:05:13,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:13,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:13,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:05:13,321 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:05:13,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 00:05:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:13,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:05:13,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:05:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:05:15,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:05:15,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:15,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024925573] [2023-11-29 00:05:15,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:05:15,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783818909] [2023-11-29 00:05:15,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783818909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:05:15,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:05:15,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:05:15,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890120050] [2023-11-29 00:05:15,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:05:15,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:05:15,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:15,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:05:15,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:05:15,897 INFO L87 Difference]: Start difference. First operand 55755 states and 82438 transitions. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 9 states have internal predecessors, (149), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:05:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:05:22,834 INFO L93 Difference]: Finished difference Result 86471 states and 128210 transitions. [2023-11-29 00:05:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:05:22,835 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 9 states have internal predecessors, (149), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 486 [2023-11-29 00:05:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:05:22,918 INFO L225 Difference]: With dead ends: 86471 [2023-11-29 00:05:22,919 INFO L226 Difference]: Without dead ends: 68613 [2023-11-29 00:05:22,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:05:22,939 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 1113 mSDsluCounter, 4536 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 5337 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:05:22,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 5337 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 00:05:22,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68613 states. [2023-11-29 00:05:27,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68613 to 59107. [2023-11-29 00:05:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59107 states, 52863 states have (on average 1.4629514026824055) internal successors, (77336), 52991 states have internal predecessors, (77336), 5028 states have call successors, (5028), 1215 states have call predecessors, (5028), 1215 states have return successors, (5028), 4900 states have call predecessors, (5028), 5028 states have call successors, (5028) [2023-11-29 00:05:28,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59107 states to 59107 states and 87392 transitions. [2023-11-29 00:05:28,134 INFO L78 Accepts]: Start accepts. Automaton has 59107 states and 87392 transitions. Word has length 486 [2023-11-29 00:05:28,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:05:28,135 INFO L495 AbstractCegarLoop]: Abstraction has 59107 states and 87392 transitions. [2023-11-29 00:05:28,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 9 states have internal predecessors, (149), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:05:28,135 INFO L276 IsEmpty]: Start isEmpty. Operand 59107 states and 87392 transitions. [2023-11-29 00:05:28,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2023-11-29 00:05:28,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:05:28,157 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:28,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 00:05:28,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:28,358 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:05:28,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:28,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1804655861, now seen corresponding path program 1 times [2023-11-29 00:05:28,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:28,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660835059] [2023-11-29 00:05:28,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:28,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:28,546 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:05:28,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007871426] [2023-11-29 00:05:28,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:28,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:28,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:05:28,548 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:05:28,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 00:05:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:29,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:05:29,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:05:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:05:30,363 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:05:30,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:30,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660835059] [2023-11-29 00:05:30,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:05:30,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007871426] [2023-11-29 00:05:30,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007871426] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:05:30,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:05:30,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:05:30,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733243784] [2023-11-29 00:05:30,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:05:30,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:05:30,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:30,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:05:30,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:05:30,366 INFO L87 Difference]: Start difference. First operand 59107 states and 87392 transitions. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 6 states have internal predecessors, (149), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:05:36,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:05:36,840 INFO L93 Difference]: Finished difference Result 85907 states and 126320 transitions. [2023-11-29 00:05:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:05:36,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 6 states have internal predecessors, (149), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 486 [2023-11-29 00:05:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:05:36,931 INFO L225 Difference]: With dead ends: 85907 [2023-11-29 00:05:36,931 INFO L226 Difference]: Without dead ends: 62137 [2023-11-29 00:05:36,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:05:36,961 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 746 mSDsluCounter, 2807 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 3521 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:05:36,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 3521 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:05:37,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62137 states. [2023-11-29 00:05:42,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62137 to 57045. [2023-11-29 00:05:42,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57045 states, 50825 states have (on average 1.4599508116084603) internal successors, (74202), 50945 states have internal predecessors, (74202), 5012 states have call successors, (5012), 1207 states have call predecessors, (5012), 1207 states have return successors, (5012), 4892 states have call predecessors, (5012), 5012 states have call successors, (5012) [2023-11-29 00:05:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57045 states to 57045 states and 84226 transitions. [2023-11-29 00:05:42,347 INFO L78 Accepts]: Start accepts. Automaton has 57045 states and 84226 transitions. Word has length 486 [2023-11-29 00:05:42,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:05:42,348 INFO L495 AbstractCegarLoop]: Abstraction has 57045 states and 84226 transitions. [2023-11-29 00:05:42,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 6 states have internal predecessors, (149), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:05:42,348 INFO L276 IsEmpty]: Start isEmpty. Operand 57045 states and 84226 transitions. [2023-11-29 00:05:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2023-11-29 00:05:42,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:05:42,367 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:42,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 00:05:42,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 00:05:42,568 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:05:42,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:42,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1412366545, now seen corresponding path program 1 times [2023-11-29 00:05:42,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:42,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598395828] [2023-11-29 00:05:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:42,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:42,623 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:05:42,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909836393] [2023-11-29 00:05:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:42,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:42,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:05:42,624 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:05:42,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 00:05:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:43,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 1275 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:05:43,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:05:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 00:05:43,570 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:05:43,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:43,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598395828] [2023-11-29 00:05:43,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:05:43,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909836393] [2023-11-29 00:05:43,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909836393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:05:43,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:05:43,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 00:05:43,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102488410] [2023-11-29 00:05:43,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:05:43,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:05:43,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:43,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:05:43,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:05:43,573 INFO L87 Difference]: Start difference. First operand 57045 states and 84226 transitions. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:05:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:05:50,985 INFO L93 Difference]: Finished difference Result 125784 states and 186222 transitions. [2023-11-29 00:05:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:05:50,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 487 [2023-11-29 00:05:50,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:05:51,095 INFO L225 Difference]: With dead ends: 125784 [2023-11-29 00:05:51,096 INFO L226 Difference]: Without dead ends: 81774 [2023-11-29 00:05:51,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:05:51,140 INFO L413 NwaCegarLoop]: 957 mSDtfsCounter, 3072 mSDsluCounter, 3382 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3072 SdHoareTripleChecker+Valid, 4339 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:05:51,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3072 Valid, 4339 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 00:05:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81774 states. [2023-11-29 00:05:56,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81774 to 59371. [2023-11-29 00:05:56,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59371 states, 53151 states have (on average 1.4624372072021223) internal successors, (77730), 53271 states have internal predecessors, (77730), 5012 states have call successors, (5012), 1207 states have call predecessors, (5012), 1207 states have return successors, (5012), 4892 states have call predecessors, (5012), 5012 states have call successors, (5012) [2023-11-29 00:05:57,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59371 states to 59371 states and 87754 transitions. [2023-11-29 00:05:57,086 INFO L78 Accepts]: Start accepts. Automaton has 59371 states and 87754 transitions. Word has length 487 [2023-11-29 00:05:57,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:05:57,087 INFO L495 AbstractCegarLoop]: Abstraction has 59371 states and 87754 transitions. [2023-11-29 00:05:57,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 00:05:57,087 INFO L276 IsEmpty]: Start isEmpty. Operand 59371 states and 87754 transitions. [2023-11-29 00:05:57,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2023-11-29 00:05:57,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:05:57,106 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:05:57,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 00:05:57,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 00:05:57,307 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:05:57,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:57,307 INFO L85 PathProgramCache]: Analyzing trace with hash 994969939, now seen corresponding path program 1 times [2023-11-29 00:05:57,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:57,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399162654] [2023-11-29 00:05:57,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:57,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:57,348 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:05:57,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561797017] [2023-11-29 00:05:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:57,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:57,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:05:57,349 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:05:57,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 00:05:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:57,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 00:05:57,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:05:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 2901 proven. 162 refuted. 0 times theorem prover too weak. 6049 trivial. 0 not checked. [2023-11-29 00:05:59,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:05:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 39 proven. 162 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 00:05:59,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:59,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399162654] [2023-11-29 00:05:59,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:05:59,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561797017] [2023-11-29 00:05:59,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561797017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:05:59,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:05:59,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-11-29 00:05:59,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147154980] [2023-11-29 00:05:59,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:05:59,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 00:05:59,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:59,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 00:05:59,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:05:59,709 INFO L87 Difference]: Start difference. First operand 59371 states and 87754 transitions. Second operand has 20 states, 20 states have (on average 13.65) internal successors, (273), 20 states have internal predecessors, (273), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-29 00:06:03,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:06:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:06:10,468 INFO L93 Difference]: Finished difference Result 142463 states and 211775 transitions. [2023-11-29 00:06:10,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 00:06:10,469 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 13.65) internal successors, (273), 20 states have internal predecessors, (273), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) Word has length 487 [2023-11-29 00:06:10,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:06:10,610 INFO L225 Difference]: With dead ends: 142463 [2023-11-29 00:06:10,610 INFO L226 Difference]: Without dead ends: 102069 [2023-11-29 00:06:10,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 993 GetRequests, 955 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 00:06:10,658 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 2211 mSDsluCounter, 2772 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2224 SdHoareTripleChecker+Valid, 3407 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:06:10,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2224 Valid, 3407 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-29 00:06:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102069 states. [2023-11-29 00:06:16,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102069 to 62795. [2023-11-29 00:06:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62795 states, 56494 states have (on average 1.4600311537508408) internal successors, (82483), 56614 states have internal predecessors, (82483), 5012 states have call successors, (5012), 1288 states have call predecessors, (5012), 1288 states have return successors, (5012), 4892 states have call predecessors, (5012), 5012 states have call successors, (5012) [2023-11-29 00:06:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62795 states to 62795 states and 92507 transitions. [2023-11-29 00:06:17,153 INFO L78 Accepts]: Start accepts. Automaton has 62795 states and 92507 transitions. Word has length 487 [2023-11-29 00:06:17,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:06:17,153 INFO L495 AbstractCegarLoop]: Abstraction has 62795 states and 92507 transitions. [2023-11-29 00:06:17,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.65) internal successors, (273), 20 states have internal predecessors, (273), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-29 00:06:17,153 INFO L276 IsEmpty]: Start isEmpty. Operand 62795 states and 92507 transitions. [2023-11-29 00:06:17,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2023-11-29 00:06:17,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:06:17,170 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:06:17,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 00:06:17,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:17,371 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:06:17,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:17,371 INFO L85 PathProgramCache]: Analyzing trace with hash 459836332, now seen corresponding path program 1 times [2023-11-29 00:06:17,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:17,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861826408] [2023-11-29 00:06:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:17,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:17,426 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:06:17,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445708960] [2023-11-29 00:06:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:17,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:17,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:17,428 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:17,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 00:06:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:18,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 1277 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 00:06:18,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 5846 proven. 252 refuted. 0 times theorem prover too weak. 3014 trivial. 0 not checked. [2023-11-29 00:06:19,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:28,329 WARN L293 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 4 DAG size of output: 1 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:07:15,423 WARN L293 SmtUtils]: Spent 18.27s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:08:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 864 proven. 297 refuted. 0 times theorem prover too weak. 7951 trivial. 0 not checked. [2023-11-29 00:08:16,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:16,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861826408] [2023-11-29 00:08:16,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:08:16,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445708960] [2023-11-29 00:08:16,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445708960] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:16,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:08:16,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-11-29 00:08:16,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083017635] [2023-11-29 00:08:16,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:16,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 00:08:16,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:16,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 00:08:16,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=1995, Unknown=1, NotChecked=0, Total=2450 [2023-11-29 00:08:16,826 INFO L87 Difference]: Start difference. First operand 62795 states and 92507 transitions. Second operand has 50 states, 47 states have (on average 6.276595744680851) internal successors, (295), 44 states have internal predecessors, (295), 13 states have call successors, (103), 7 states have call predecessors, (103), 16 states have return successors, (104), 13 states have call predecessors, (104), 13 states have call successors, (104) [2023-11-29 00:08:32,498 WARN L293 SmtUtils]: Spent 12.96s on a formula simplification. DAG size of input: 58 DAG size of output: 56 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:08:33,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:08:36,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.64s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:08:50,397 WARN L293 SmtUtils]: Spent 13.42s on a formula simplification. DAG size of input: 59 DAG size of output: 60 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:09:33,251 WARN L293 SmtUtils]: Spent 20.49s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:09:50,523 WARN L293 SmtUtils]: Spent 12.48s on a formula simplification. DAG size of input: 59 DAG size of output: 56 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:10:17,990 WARN L293 SmtUtils]: Spent 15.04s on a formula simplification. DAG size of input: 50 DAG size of output: 46 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:10:20,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:10:38,139 WARN L293 SmtUtils]: Spent 17.27s on a formula simplification. DAG size of input: 51 DAG size of output: 49 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:10:48,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:10:48,340 INFO L93 Difference]: Finished difference Result 227543 states and 334120 transitions. [2023-11-29 00:10:48,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-29 00:10:48,340 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 6.276595744680851) internal successors, (295), 44 states have internal predecessors, (295), 13 states have call successors, (103), 7 states have call predecessors, (103), 16 states have return successors, (104), 13 states have call predecessors, (104), 13 states have call successors, (104) Word has length 487 [2023-11-29 00:10:48,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:10:48,579 INFO L225 Difference]: With dead ends: 227543 [2023-11-29 00:10:48,579 INFO L226 Difference]: Without dead ends: 193323 [2023-11-29 00:10:48,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1072 GetRequests, 936 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5707 ImplicationChecksByTransitivity, 182.5s TimeCoverageRelationStatistics Valid=4458, Invalid=14171, Unknown=3, NotChecked=0, Total=18632 [2023-11-29 00:10:48,623 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 8077 mSDsluCounter, 5756 mSDsCounter, 0 mSdLazyCounter, 4640 mSolverCounterSat, 1947 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8109 SdHoareTripleChecker+Valid, 6317 SdHoareTripleChecker+Invalid, 6587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1947 IncrementalHoareTripleChecker+Valid, 4640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:10:48,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8109 Valid, 6317 Invalid, 6587 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1947 Valid, 4640 Invalid, 0 Unknown, 0 Unchecked, 18.6s Time] [2023-11-29 00:10:48,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193323 states. [2023-11-29 00:10:57,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193323 to 77049. [2023-11-29 00:10:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77049 states, 70342 states have (on average 1.4515225612009894) internal successors, (102103), 70462 states have internal predecessors, (102103), 5012 states have call successors, (5012), 1694 states have call predecessors, (5012), 1694 states have return successors, (5012), 4892 states have call predecessors, (5012), 5012 states have call successors, (5012) [2023-11-29 00:10:57,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77049 states to 77049 states and 112127 transitions. [2023-11-29 00:10:57,164 INFO L78 Accepts]: Start accepts. Automaton has 77049 states and 112127 transitions. Word has length 487 [2023-11-29 00:10:57,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:10:57,165 INFO L495 AbstractCegarLoop]: Abstraction has 77049 states and 112127 transitions. [2023-11-29 00:10:57,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 6.276595744680851) internal successors, (295), 44 states have internal predecessors, (295), 13 states have call successors, (103), 7 states have call predecessors, (103), 16 states have return successors, (104), 13 states have call predecessors, (104), 13 states have call successors, (104) [2023-11-29 00:10:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand 77049 states and 112127 transitions. [2023-11-29 00:10:57,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2023-11-29 00:10:57,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:10:57,182 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:10:57,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 00:10:57,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:10:57,383 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:10:57,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:10:57,384 INFO L85 PathProgramCache]: Analyzing trace with hash 600384942, now seen corresponding path program 1 times [2023-11-29 00:10:57,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:10:57,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132453340] [2023-11-29 00:10:57,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:10:57,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:10:57,448 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:10:57,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736785283] [2023-11-29 00:10:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:10:57,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:10:57,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:10:57,450 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:10:57,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31680ee-a4b5-4c5a-aa97-7f0aaa449458/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process