./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-a_file-58.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_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/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_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-a_file-58.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/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_5ca846bd-8f80-4296-bb22-fe3fbda3258f/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 588d5c1b74b435c7b48e7846cdcbcdd05a5e0ef56f650b6f67ae59d316b919cf --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:35:39,707 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:35:39,770 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:35:39,774 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:35:39,774 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:35:39,796 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:35:39,796 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:35:39,797 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:35:39,798 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:35:39,798 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:35:39,799 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:35:39,799 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:35:39,800 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:35:39,801 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:35:39,801 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:35:39,802 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:35:39,803 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:35:39,803 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:35:39,804 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:35:39,804 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:35:39,805 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:35:39,805 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:35:39,806 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:35:39,806 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:35:39,807 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:35:39,807 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:35:39,808 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:35:39,808 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:35:39,809 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:35:39,809 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:35:39,809 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:35:39,810 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:35:39,810 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:35:39,810 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:35:39,811 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:35:39,811 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:35:39,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:35:39,811 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:35:39,811 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:35:39,811 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:35:39,812 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:35:39,812 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:35:39,812 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_5ca846bd-8f80-4296-bb22-fe3fbda3258f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588d5c1b74b435c7b48e7846cdcbcdd05a5e0ef56f650b6f67ae59d316b919cf [2023-11-28 20:35:40,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:35:40,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:35:40,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:35:40,060 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:35:40,060 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:35:40,061 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-a_file-58.i [2023-11-28 20:35:43,013 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:35:43,187 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:35:43,188 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-a_file-58.i [2023-11-28 20:35:43,198 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/data/6cfdfdd43/88c3d6eb7e6442d998a522dcc9325314/FLAG05d954204 [2023-11-28 20:35:43,211 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/data/6cfdfdd43/88c3d6eb7e6442d998a522dcc9325314 [2023-11-28 20:35:43,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:35:43,216 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:35:43,217 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:35:43,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:35:43,222 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:35:43,222 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:35:43" (1/1) ... [2023-11-28 20:35:43,224 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65abebca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:43, skipping insertion in model container [2023-11-28 20:35:43,224 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:35:43" (1/1) ... [2023-11-28 20:35:43,249 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:35:43,370 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_5ca846bd-8f80-4296-bb22-fe3fbda3258f/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-a_file-58.i[916,929] [2023-11-28 20:35:43,442 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:35:43,453 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:35:43,463 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_5ca846bd-8f80-4296-bb22-fe3fbda3258f/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-a_file-58.i[916,929] [2023-11-28 20:35:43,505 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:35:43,520 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:35:43,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:43 WrapperNode [2023-11-28 20:35:43,520 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:35:43,521 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:35:43,521 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:35:43,521 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:35:43,527 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:43" (1/1) ... [2023-11-28 20:35:43,542 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:43" (1/1) ... [2023-11-28 20:35:43,583 INFO L138 Inliner]: procedures = 26, calls = 156, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 385 [2023-11-28 20:35:43,583 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:35:43,584 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:35:43,584 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:35:43,585 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:35:43,594 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:43" (1/1) ... [2023-11-28 20:35:43,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:43" (1/1) ... [2023-11-28 20:35:43,601 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:43" (1/1) ... [2023-11-28 20:35:43,624 INFO L175 MemorySlicer]: Split 125 memory accesses to 6 slices as follows [2, 6, 11, 7, 74, 25]. 59 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 1, 1, 1, 6, 2]. The 15 writes are split as follows [0, 1, 1, 3, 8, 2]. [2023-11-28 20:35:43,624 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:43" (1/1) ... [2023-11-28 20:35:43,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:43" (1/1) ... [2023-11-28 20:35:43,645 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:43" (1/1) ... [2023-11-28 20:35:43,650 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:43" (1/1) ... [2023-11-28 20:35:43,654 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:43" (1/1) ... [2023-11-28 20:35:43,657 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:43" (1/1) ... [2023-11-28 20:35:43,664 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:35:43,665 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:35:43,665 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:35:43,665 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:35:43,666 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:43" (1/1) ... [2023-11-28 20:35:43,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:35:43,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:43,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:35:43,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:35:43,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:35:43,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:35:43,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:35:43,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 20:35:43,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-28 20:35:43,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-28 20:35:43,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-28 20:35:43,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:35:43,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:35:43,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 20:35:43,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-28 20:35:43,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-28 20:35:43,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-28 20:35:43,733 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-28 20:35:43,733 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-28 20:35:43,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:35:43,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:35:43,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:35:43,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-28 20:35:43,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-28 20:35:43,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-28 20:35:43,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:35:43,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:35:43,848 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:35:43,850 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:35:44,320 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:35:44,350 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:35:44,350 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-28 20:35:44,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:35:44 BoogieIcfgContainer [2023-11-28 20:35:44,351 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:35:44,354 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:35:44,354 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:35:44,357 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:35:44,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:35:43" (1/3) ... [2023-11-28 20:35:44,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec1d245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:35:44, skipping insertion in model container [2023-11-28 20:35:44,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:35:43" (2/3) ... [2023-11-28 20:35:44,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec1d245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:35:44, skipping insertion in model container [2023-11-28 20:35:44,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:35:44" (3/3) ... [2023-11-28 20:35:44,361 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_variablewrapping_wrapper-a_file-58.i [2023-11-28 20:35:44,382 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:35:44,383 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:35:44,438 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:35:44,445 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;@dbba39d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:35:44,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:35:44,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 67 states have (on average 1.4328358208955223) internal successors, (96), 68 states have internal predecessors, (96), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-28 20:35:44,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-28 20:35:44,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:44,467 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:44,467 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:44,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:44,472 INFO L85 PathProgramCache]: Analyzing trace with hash -370712058, now seen corresponding path program 1 times [2023-11-28 20:35:44,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:44,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574428562] [2023-11-28 20:35:44,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:44,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:44,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:44,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574428562] [2023-11-28 20:35:44,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-28 20:35:44,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642496538] [2023-11-28 20:35:44,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:44,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:44,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:44,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:44,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:35:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:44,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-28 20:35:44,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-11-28 20:35:44,947 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:35:44,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642496538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:44,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:44,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:35:44,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171237502] [2023-11-28 20:35:44,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:44,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:35:44,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:44,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:35:44,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:35:44,989 INFO L87 Difference]: Start difference. First operand has 85 states, 67 states have (on average 1.4328358208955223) internal successors, (96), 68 states have internal predecessors, (96), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-28 20:35:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:45,039 INFO L93 Difference]: Finished difference Result 163 states and 259 transitions. [2023-11-28 20:35:45,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:35:45,042 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2023-11-28 20:35:45,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:45,050 INFO L225 Difference]: With dead ends: 163 [2023-11-28 20:35:45,050 INFO L226 Difference]: Without dead ends: 79 [2023-11-28 20:35:45,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:35:45,057 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:45,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:35:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-28 20:35:45,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-11-28 20:35:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.3387096774193548) internal successors, (83), 62 states have internal predecessors, (83), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-28 20:35:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 113 transitions. [2023-11-28 20:35:45,102 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 113 transitions. Word has length 111 [2023-11-28 20:35:45,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:45,103 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 113 transitions. [2023-11-28 20:35:45,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-28 20:35:45,104 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 113 transitions. [2023-11-28 20:35:45,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-28 20:35:45,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:45,108 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:45,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:35:45,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-28 20:35:45,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:45,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:45,314 INFO L85 PathProgramCache]: Analyzing trace with hash -433786332, now seen corresponding path program 1 times [2023-11-28 20:35:45,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:45,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163609321] [2023-11-28 20:35:45,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:45,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:45,384 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:35:45,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364969178] [2023-11-28 20:35:45,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:45,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:45,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:45,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:45,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:35:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:45,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:35:45,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:35:45,627 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:35:45,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:45,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163609321] [2023-11-28 20:35:45,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:35:45,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364969178] [2023-11-28 20:35:45,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364969178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:45,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:45,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:35:45,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358949099] [2023-11-28 20:35:45,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:45,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:35:45,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:45,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:35:45,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:35:45,632 INFO L87 Difference]: Start difference. First operand 79 states and 113 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:45,683 INFO L93 Difference]: Finished difference Result 161 states and 230 transitions. [2023-11-28 20:35:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:35:45,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 111 [2023-11-28 20:35:45,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:45,686 INFO L225 Difference]: With dead ends: 161 [2023-11-28 20:35:45,686 INFO L226 Difference]: Without dead ends: 83 [2023-11-28 20:35:45,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:35:45,689 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 3 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:45,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 315 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:35:45,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-28 20:35:45,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2023-11-28 20:35:45,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 64 states have (on average 1.328125) internal successors, (85), 64 states have internal predecessors, (85), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-28 20:35:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2023-11-28 20:35:45,702 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 111 [2023-11-28 20:35:45,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:45,704 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2023-11-28 20:35:45,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:45,704 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2023-11-28 20:35:45,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-28 20:35:45,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:45,707 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:45,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:35:45,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:45,908 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:45,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:45,908 INFO L85 PathProgramCache]: Analyzing trace with hash -433726750, now seen corresponding path program 1 times [2023-11-28 20:35:45,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:45,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778016389] [2023-11-28 20:35:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:45,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:45,959 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:35:45,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675143499] [2023-11-28 20:35:45,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:45,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:45,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:45,961 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:45,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:35:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:46,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-28 20:35:46,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:46,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:35:46,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-28 20:35:46,442 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:35:46,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2023-11-28 20:35:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-28 20:35:46,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:35:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:35:46,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:46,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778016389] [2023-11-28 20:35:46,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:35:46,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675143499] [2023-11-28 20:35:46,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675143499] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:35:46,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:35:46,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-11-28 20:35:46,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137752883] [2023-11-28 20:35:46,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:46,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:35:46,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:46,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:35:46,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:35:46,587 INFO L87 Difference]: Start difference. First operand 81 states and 115 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:46,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:46,933 INFO L93 Difference]: Finished difference Result 249 states and 352 transitions. [2023-11-28 20:35:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 20:35:46,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 111 [2023-11-28 20:35:46,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:46,937 INFO L225 Difference]: With dead ends: 249 [2023-11-28 20:35:46,937 INFO L226 Difference]: Without dead ends: 169 [2023-11-28 20:35:46,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:35:46,940 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 196 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:46,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 514 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:35:46,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-28 20:35:46,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 147. [2023-11-28 20:35:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 118 states have (on average 1.3220338983050848) internal successors, (156), 119 states have internal predecessors, (156), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-28 20:35:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 208 transitions. [2023-11-28 20:35:46,963 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 208 transitions. Word has length 111 [2023-11-28 20:35:46,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:46,964 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 208 transitions. [2023-11-28 20:35:46,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:46,965 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 208 transitions. [2023-11-28 20:35:46,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-28 20:35:46,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:46,968 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:46,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:35:47,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:47,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:47,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:47,174 INFO L85 PathProgramCache]: Analyzing trace with hash 267337828, now seen corresponding path program 1 times [2023-11-28 20:35:47,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:47,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211508956] [2023-11-28 20:35:47,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:47,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:47,214 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:35:47,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480862223] [2023-11-28 20:35:47,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:47,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:47,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:47,216 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:47,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:35:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:47,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-28 20:35:47,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:47,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:35:47,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:35:47,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:35:47,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-11-28 20:35:47,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:35:47,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 22 [2023-11-28 20:35:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:35:47,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:35:47,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:47,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211508956] [2023-11-28 20:35:47,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:35:47,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480862223] [2023-11-28 20:35:47,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480862223] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:47,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:47,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:35:47,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207444893] [2023-11-28 20:35:47,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:47,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:35:47,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:47,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:35:47,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:35:47,682 INFO L87 Difference]: Start difference. First operand 147 states and 208 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:48,170 INFO L93 Difference]: Finished difference Result 354 states and 495 transitions. [2023-11-28 20:35:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:35:48,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 111 [2023-11-28 20:35:48,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:48,175 INFO L225 Difference]: With dead ends: 354 [2023-11-28 20:35:48,175 INFO L226 Difference]: Without dead ends: 208 [2023-11-28 20:35:48,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:35:48,177 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 312 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:48,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 236 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:35:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-28 20:35:48,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 164. [2023-11-28 20:35:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 128 states have (on average 1.2890625) internal successors, (165), 130 states have internal predecessors, (165), 31 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-28 20:35:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 227 transitions. [2023-11-28 20:35:48,202 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 227 transitions. Word has length 111 [2023-11-28 20:35:48,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:48,203 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 227 transitions. [2023-11-28 20:35:48,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:48,203 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 227 transitions. [2023-11-28 20:35:48,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-28 20:35:48,205 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:48,205 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:48,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-28 20:35:48,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:48,409 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:48,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:48,410 INFO L85 PathProgramCache]: Analyzing trace with hash -133092051, now seen corresponding path program 1 times [2023-11-28 20:35:48,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:48,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895433288] [2023-11-28 20:35:48,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:48,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:48,448 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:35:48,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647641799] [2023-11-28 20:35:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:48,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:48,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:48,450 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:48,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:35:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:48,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:35:48,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:48,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-28 20:35:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:35:48,670 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:35:48,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:48,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895433288] [2023-11-28 20:35:48,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:35:48,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647641799] [2023-11-28 20:35:48,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647641799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:48,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:48,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:35:48,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403671874] [2023-11-28 20:35:48,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:48,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:35:48,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:48,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:35:48,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:35:48,674 INFO L87 Difference]: Start difference. First operand 164 states and 227 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:48,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:48,906 INFO L93 Difference]: Finished difference Result 405 states and 565 transitions. [2023-11-28 20:35:48,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:35:48,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 111 [2023-11-28 20:35:48,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:48,909 INFO L225 Difference]: With dead ends: 405 [2023-11-28 20:35:48,910 INFO L226 Difference]: Without dead ends: 256 [2023-11-28 20:35:48,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:35:48,911 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 159 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:48,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 477 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:35:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-11-28 20:35:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 233. [2023-11-28 20:35:48,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 181 states have (on average 1.276243093922652) internal successors, (231), 183 states have internal predecessors, (231), 46 states have call successors, (46), 5 states have call predecessors, (46), 5 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-28 20:35:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 323 transitions. [2023-11-28 20:35:48,942 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 323 transitions. Word has length 111 [2023-11-28 20:35:48,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:48,943 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 323 transitions. [2023-11-28 20:35:48,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:48,944 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 323 transitions. [2023-11-28 20:35:48,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-28 20:35:48,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:48,945 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:48,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:35:49,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:49,149 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:49,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:49,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1454795104, now seen corresponding path program 1 times [2023-11-28 20:35:49,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:49,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391513565] [2023-11-28 20:35:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:49,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:49,185 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:35:49,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645778401] [2023-11-28 20:35:49,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:49,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:49,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:49,187 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:49,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:35:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:49,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-28 20:35:49,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:49,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:35:49,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-11-28 20:35:49,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:35:49,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 22 [2023-11-28 20:35:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:35:49,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:35:49,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:49,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391513565] [2023-11-28 20:35:49,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:35:49,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645778401] [2023-11-28 20:35:49,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645778401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:49,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:49,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:35:49,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501175620] [2023-11-28 20:35:49,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:49,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:35:49,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:49,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:35:49,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:35:49,623 INFO L87 Difference]: Start difference. First operand 233 states and 323 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:50,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:50,127 INFO L93 Difference]: Finished difference Result 479 states and 662 transitions. [2023-11-28 20:35:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:35:50,128 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 111 [2023-11-28 20:35:50,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:50,131 INFO L225 Difference]: With dead ends: 479 [2023-11-28 20:35:50,131 INFO L226 Difference]: Without dead ends: 261 [2023-11-28 20:35:50,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:35:50,133 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 210 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:50,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 304 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:35:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-28 20:35:50,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 237. [2023-11-28 20:35:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 184 states have (on average 1.266304347826087) internal successors, (233), 186 states have internal predecessors, (233), 46 states have call successors, (46), 6 states have call predecessors, (46), 6 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-28 20:35:50,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 325 transitions. [2023-11-28 20:35:50,157 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 325 transitions. Word has length 111 [2023-11-28 20:35:50,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:50,158 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 325 transitions. [2023-11-28 20:35:50,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 325 transitions. [2023-11-28 20:35:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-28 20:35:50,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:50,160 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:50,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:35:50,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-28 20:35:50,361 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:50,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:50,362 INFO L85 PathProgramCache]: Analyzing trace with hash -753730526, now seen corresponding path program 1 times [2023-11-28 20:35:50,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:50,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550001297] [2023-11-28 20:35:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:50,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:50,398 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:35:50,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920950568] [2023-11-28 20:35:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:50,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:50,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:50,400 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:50,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:35:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:50,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-28 20:35:50,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:50,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-28 20:35:50,738 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:35:50,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2023-11-28 20:35:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-28 20:35:50,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:35:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:35:50,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:50,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550001297] [2023-11-28 20:35:50,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:35:50,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920950568] [2023-11-28 20:35:50,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920950568] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:35:50,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:35:50,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-11-28 20:35:50,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640597142] [2023-11-28 20:35:50,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:50,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:35:50,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:50,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:35:50,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:35:50,848 INFO L87 Difference]: Start difference. First operand 237 states and 325 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:51,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:51,076 INFO L93 Difference]: Finished difference Result 461 states and 632 transitions. [2023-11-28 20:35:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:35:51,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 111 [2023-11-28 20:35:51,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:51,080 INFO L225 Difference]: With dead ends: 461 [2023-11-28 20:35:51,080 INFO L226 Difference]: Without dead ends: 239 [2023-11-28 20:35:51,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-11-28 20:35:51,082 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 128 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:51,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 597 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:35:51,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-11-28 20:35:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2023-11-28 20:35:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 184 states have (on average 1.2608695652173914) internal successors, (232), 186 states have internal predecessors, (232), 46 states have call successors, (46), 6 states have call predecessors, (46), 6 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-28 20:35:51,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 324 transitions. [2023-11-28 20:35:51,104 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 324 transitions. Word has length 111 [2023-11-28 20:35:51,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:51,104 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 324 transitions. [2023-11-28 20:35:51,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:51,105 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 324 transitions. [2023-11-28 20:35:51,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-28 20:35:51,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:51,107 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:51,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:35:51,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-28 20:35:51,307 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:51,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:51,308 INFO L85 PathProgramCache]: Analyzing trace with hash 695402590, now seen corresponding path program 1 times [2023-11-28 20:35:51,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:51,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198776625] [2023-11-28 20:35:51,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:51,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:51,347 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:35:51,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59223191] [2023-11-28 20:35:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:51,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:51,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:51,349 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:51,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:35:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:51,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:35:51,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:51,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-28 20:35:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:35:51,579 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:35:51,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:51,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198776625] [2023-11-28 20:35:51,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:35:51,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59223191] [2023-11-28 20:35:51,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59223191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:51,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:51,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:35:51,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860312868] [2023-11-28 20:35:51,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:51,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:35:51,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:51,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:35:51,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:35:51,583 INFO L87 Difference]: Start difference. First operand 237 states and 324 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:51,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:51,785 INFO L93 Difference]: Finished difference Result 461 states and 630 transitions. [2023-11-28 20:35:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:35:51,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 112 [2023-11-28 20:35:51,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:51,788 INFO L225 Difference]: With dead ends: 461 [2023-11-28 20:35:51,789 INFO L226 Difference]: Without dead ends: 239 [2023-11-28 20:35:51,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:35:51,791 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 129 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:51,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 387 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:35:51,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-11-28 20:35:51,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2023-11-28 20:35:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 184 states have (on average 1.25) internal successors, (230), 186 states have internal predecessors, (230), 46 states have call successors, (46), 6 states have call predecessors, (46), 6 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-28 20:35:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 322 transitions. [2023-11-28 20:35:51,816 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 322 transitions. Word has length 112 [2023-11-28 20:35:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:51,816 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 322 transitions. [2023-11-28 20:35:51,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 322 transitions. [2023-11-28 20:35:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-28 20:35:51,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:51,819 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:51,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:35:52,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:52,020 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:52,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:52,020 INFO L85 PathProgramCache]: Analyzing trace with hash 996037289, now seen corresponding path program 1 times [2023-11-28 20:35:52,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:52,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682800187] [2023-11-28 20:35:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:52,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:52,057 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:35:52,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267812366] [2023-11-28 20:35:52,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:52,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:52,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:52,059 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:52,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:35:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:52,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:35:52,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:52,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:35:52,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:35:52,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2023-11-28 20:35:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:35:52,433 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:35:52,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:52,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682800187] [2023-11-28 20:35:52,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:35:52,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267812366] [2023-11-28 20:35:52,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267812366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:52,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:52,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:35:52,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391731120] [2023-11-28 20:35:52,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:52,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:35:52,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:52,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:35:52,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:35:52,436 INFO L87 Difference]: Start difference. First operand 237 states and 322 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:52,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:52,792 INFO L93 Difference]: Finished difference Result 520 states and 708 transitions. [2023-11-28 20:35:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:35:52,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 112 [2023-11-28 20:35:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:52,795 INFO L225 Difference]: With dead ends: 520 [2023-11-28 20:35:52,795 INFO L226 Difference]: Without dead ends: 298 [2023-11-28 20:35:52,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:35:52,797 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 132 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:52,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 214 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:35:52,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-28 20:35:52,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 295. [2023-11-28 20:35:52,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 232 states have (on average 1.2586206896551724) internal successors, (292), 235 states have internal predecessors, (292), 55 states have call successors, (55), 7 states have call predecessors, (55), 7 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-28 20:35:52,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 402 transitions. [2023-11-28 20:35:52,824 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 402 transitions. Word has length 112 [2023-11-28 20:35:52,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:52,824 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 402 transitions. [2023-11-28 20:35:52,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:52,825 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 402 transitions. [2023-11-28 20:35:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-28 20:35:52,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:52,826 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:52,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-28 20:35:53,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:53,027 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:53,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:53,027 INFO L85 PathProgramCache]: Analyzing trace with hash 294972711, now seen corresponding path program 1 times [2023-11-28 20:35:53,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:53,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477100447] [2023-11-28 20:35:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:53,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:53,056 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:35:53,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637811313] [2023-11-28 20:35:53,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:53,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:53,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:53,058 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:53,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:35:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:53,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-28 20:35:53,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:53,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:35:53,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2023-11-28 20:35:53,456 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:35:53,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2023-11-28 20:35:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-28 20:35:53,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:35:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:35:53,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:53,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477100447] [2023-11-28 20:35:53,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:35:53,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637811313] [2023-11-28 20:35:53,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637811313] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:35:53,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:35:53,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2023-11-28 20:35:53,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938771153] [2023-11-28 20:35:53,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:53,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:35:53,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:53,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:35:53,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:35:53,645 INFO L87 Difference]: Start difference. First operand 295 states and 402 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:54,152 INFO L93 Difference]: Finished difference Result 599 states and 812 transitions. [2023-11-28 20:35:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:35:54,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 112 [2023-11-28 20:35:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:54,156 INFO L225 Difference]: With dead ends: 599 [2023-11-28 20:35:54,156 INFO L226 Difference]: Without dead ends: 319 [2023-11-28 20:35:54,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-11-28 20:35:54,158 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 189 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:54,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 757 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:35:54,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-11-28 20:35:54,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 315. [2023-11-28 20:35:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 244 states have (on average 1.2418032786885247) internal successors, (303), 247 states have internal predecessors, (303), 61 states have call successors, (61), 9 states have call predecessors, (61), 9 states have return successors, (61), 58 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-28 20:35:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 425 transitions. [2023-11-28 20:35:54,188 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 425 transitions. Word has length 112 [2023-11-28 20:35:54,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:54,189 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 425 transitions. [2023-11-28 20:35:54,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:54,189 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 425 transitions. [2023-11-28 20:35:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-28 20:35:54,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:54,191 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:54,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 20:35:54,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:54,391 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:54,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:54,392 INFO L85 PathProgramCache]: Analyzing trace with hash -592310613, now seen corresponding path program 1 times [2023-11-28 20:35:54,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:54,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79334977] [2023-11-28 20:35:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:54,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:54,420 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:35:54,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516334163] [2023-11-28 20:35:54,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:54,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:54,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:54,422 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:54,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 20:35:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:54,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-28 20:35:54,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:54,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2023-11-28 20:35:54,786 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:35:54,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2023-11-28 20:35:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-28 20:35:54,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:35:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:35:54,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:54,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79334977] [2023-11-28 20:35:54,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:35:54,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516334163] [2023-11-28 20:35:54,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516334163] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:35:54,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:35:54,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2023-11-28 20:35:54,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374424238] [2023-11-28 20:35:54,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:54,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:35:54,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:54,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:35:54,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:35:54,968 INFO L87 Difference]: Start difference. First operand 315 states and 425 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:55,493 INFO L93 Difference]: Finished difference Result 632 states and 852 transitions. [2023-11-28 20:35:55,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:35:55,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 112 [2023-11-28 20:35:55,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:55,499 INFO L225 Difference]: With dead ends: 632 [2023-11-28 20:35:55,500 INFO L226 Difference]: Without dead ends: 344 [2023-11-28 20:35:55,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2023-11-28 20:35:55,502 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 207 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:55,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 786 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:35:55,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-11-28 20:35:55,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 322. [2023-11-28 20:35:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 250 states have (on average 1.236) internal successors, (309), 253 states have internal predecessors, (309), 61 states have call successors, (61), 10 states have call predecessors, (61), 10 states have return successors, (61), 58 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-28 20:35:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 431 transitions. [2023-11-28 20:35:55,522 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 431 transitions. Word has length 112 [2023-11-28 20:35:55,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:55,523 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 431 transitions. [2023-11-28 20:35:55,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:55,523 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 431 transitions. [2023-11-28 20:35:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-28 20:35:55,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:55,524 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:55,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 20:35:55,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:55,725 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:55,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:55,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1293375191, now seen corresponding path program 1 times [2023-11-28 20:35:55,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:55,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063054104] [2023-11-28 20:35:55,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:55,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:55,747 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:35:55,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056312675] [2023-11-28 20:35:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:55,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:55,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:55,749 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:55,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 20:35:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:55,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:35:55,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:56,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:35:56,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:35:56,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2023-11-28 20:35:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:35:56,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:35:56,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:56,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063054104] [2023-11-28 20:35:56,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:35:56,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056312675] [2023-11-28 20:35:56,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056312675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:56,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:56,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:35:56,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490427387] [2023-11-28 20:35:56,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:56,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:35:56,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:35:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:35:56,118 INFO L87 Difference]: Start difference. First operand 322 states and 431 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:56,477 INFO L93 Difference]: Finished difference Result 617 states and 826 transitions. [2023-11-28 20:35:56,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:35:56,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 112 [2023-11-28 20:35:56,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:56,480 INFO L225 Difference]: With dead ends: 617 [2023-11-28 20:35:56,480 INFO L226 Difference]: Without dead ends: 322 [2023-11-28 20:35:56,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:35:56,481 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 130 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:56,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 275 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:35:56,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-11-28 20:35:56,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2023-11-28 20:35:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 247 states have (on average 1.2307692307692308) internal successors, (304), 250 states have internal predecessors, (304), 61 states have call successors, (61), 10 states have call predecessors, (61), 10 states have return successors, (61), 58 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-28 20:35:56,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 426 transitions. [2023-11-28 20:35:56,501 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 426 transitions. Word has length 112 [2023-11-28 20:35:56,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:56,501 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 426 transitions. [2023-11-28 20:35:56,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:56,501 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 426 transitions. [2023-11-28 20:35:56,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-28 20:35:56,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:56,503 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:56,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-28 20:35:56,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-28 20:35:56,703 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:56,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:56,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1184079089, now seen corresponding path program 1 times [2023-11-28 20:35:56,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:56,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701115319] [2023-11-28 20:35:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:56,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:56,725 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:35:56,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028992960] [2023-11-28 20:35:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:56,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:56,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:56,726 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:56,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 20:35:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:56,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-28 20:35:56,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:56,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-28 20:35:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-28 20:35:56,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:35:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:35:57,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:57,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701115319] [2023-11-28 20:35:57,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:35:57,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028992960] [2023-11-28 20:35:57,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028992960] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:35:57,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:35:57,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 9 [2023-11-28 20:35:57,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846962041] [2023-11-28 20:35:57,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:57,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:35:57,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:57,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:35:57,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:35:57,035 INFO L87 Difference]: Start difference. First operand 319 states and 426 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:57,292 INFO L93 Difference]: Finished difference Result 853 states and 1137 transitions. [2023-11-28 20:35:57,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:35:57,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 113 [2023-11-28 20:35:57,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:57,297 INFO L225 Difference]: With dead ends: 853 [2023-11-28 20:35:57,297 INFO L226 Difference]: Without dead ends: 561 [2023-11-28 20:35:57,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:35:57,298 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 122 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:57,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 544 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:35:57,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2023-11-28 20:35:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 451. [2023-11-28 20:35:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 357 states have (on average 1.2156862745098038) internal successors, (434), 362 states have internal predecessors, (434), 79 states have call successors, (79), 14 states have call predecessors, (79), 14 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-28 20:35:57,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 592 transitions. [2023-11-28 20:35:57,341 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 592 transitions. Word has length 113 [2023-11-28 20:35:57,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:57,341 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 592 transitions. [2023-11-28 20:35:57,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:35:57,341 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 592 transitions. [2023-11-28 20:35:57,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-28 20:35:57,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:57,343 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:57,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 20:35:57,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-28 20:35:57,543 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:57,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2126233590, now seen corresponding path program 1 times [2023-11-28 20:35:57,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:57,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492265956] [2023-11-28 20:35:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:57,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:57,565 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:35:57,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8423740] [2023-11-28 20:35:57,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:57,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:57,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:57,567 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:57,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 20:36:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:04,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-28 20:36:04,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:04,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 5 [2023-11-28 20:36:04,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-28 20:36:04,949 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:36:04,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2023-11-28 20:36:05,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:36:05,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 46 [2023-11-28 20:36:05,754 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:36:05,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 46 [2023-11-28 20:36:10,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2023-11-28 20:36:10,790 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:36:10,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 43 [2023-11-28 20:36:10,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2023-11-28 20:36:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 235 proven. 158 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-28 20:36:13,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:17,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:17,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492265956] [2023-11-28 20:36:17,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:17,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8423740] [2023-11-28 20:36:17,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8423740] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:17,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:36:17,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [26] total 30 [2023-11-28 20:36:17,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065561080] [2023-11-28 20:36:17,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:17,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:36:17,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:17,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:36:17,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2023-11-28 20:36:17,211 INFO L87 Difference]: Start difference. First operand 451 states and 592 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:19,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:19,858 INFO L93 Difference]: Finished difference Result 967 states and 1264 transitions. [2023-11-28 20:36:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:36:19,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 114 [2023-11-28 20:36:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:19,863 INFO L225 Difference]: With dead ends: 967 [2023-11-28 20:36:19,863 INFO L226 Difference]: Without dead ends: 543 [2023-11-28 20:36:19,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2023-11-28 20:36:19,865 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 120 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:19,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 273 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-28 20:36:19,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-11-28 20:36:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 519. [2023-11-28 20:36:19,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 416 states have (on average 1.2139423076923077) internal successors, (505), 423 states have internal predecessors, (505), 83 states have call successors, (83), 19 states have call predecessors, (83), 19 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2023-11-28 20:36:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 671 transitions. [2023-11-28 20:36:19,916 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 671 transitions. Word has length 114 [2023-11-28 20:36:19,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:19,917 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 671 transitions. [2023-11-28 20:36:19,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 671 transitions. [2023-11-28 20:36:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-28 20:36:19,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:19,919 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:19,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-28 20:36:20,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 20:36:20,120 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:20,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:20,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1889182760, now seen corresponding path program 1 times [2023-11-28 20:36:20,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:20,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724798834] [2023-11-28 20:36:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:20,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:20,170 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:20,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927448697] [2023-11-28 20:36:20,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:20,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:20,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:20,172 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:20,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 20:36:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:20,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-28 20:36:20,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:20,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-28 20:36:20,477 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:36:20,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2023-11-28 20:36:20,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:36:20,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 25 [2023-11-28 20:36:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-28 20:36:20,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:20,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:20,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724798834] [2023-11-28 20:36:20,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:20,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927448697] [2023-11-28 20:36:20,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927448697] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:20,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:36:20,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-11-28 20:36:20,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873947487] [2023-11-28 20:36:20,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:20,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:36:20,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:20,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:36:20,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:36:20,645 INFO L87 Difference]: Start difference. First operand 519 states and 671 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:20,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:20,833 INFO L93 Difference]: Finished difference Result 545 states and 702 transitions. [2023-11-28 20:36:20,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:36:20,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 115 [2023-11-28 20:36:20,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:20,837 INFO L225 Difference]: With dead ends: 545 [2023-11-28 20:36:20,837 INFO L226 Difference]: Without dead ends: 543 [2023-11-28 20:36:20,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:36:20,838 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 61 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:20,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 314 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:36:20,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-11-28 20:36:20,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 531. [2023-11-28 20:36:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 431 states have (on average 1.2064965197215778) internal successors, (520), 438 states have internal predecessors, (520), 79 states have call successors, (79), 20 states have call predecessors, (79), 20 states have return successors, (79), 72 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-28 20:36:20,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 678 transitions. [2023-11-28 20:36:20,884 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 678 transitions. Word has length 115 [2023-11-28 20:36:20,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:20,885 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 678 transitions. [2023-11-28 20:36:20,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:20,885 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 678 transitions. [2023-11-28 20:36:20,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-28 20:36:20,886 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:20,886 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:20,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-28 20:36:21,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:21,087 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:21,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:21,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1889123178, now seen corresponding path program 1 times [2023-11-28 20:36:21,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:21,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117314658] [2023-11-28 20:36:21,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:21,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:21,106 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:21,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39375840] [2023-11-28 20:36:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:21,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:21,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:21,107 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:21,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 20:36:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:21,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-28 20:36:21,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:21,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-11-28 20:36:21,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2023-11-28 20:36:21,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 36 [2023-11-28 20:36:21,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:36:21,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 77 [2023-11-28 20:36:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-28 20:36:21,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:21,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:21,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117314658] [2023-11-28 20:36:21,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:21,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39375840] [2023-11-28 20:36:21,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39375840] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:21,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:36:21,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 18 [2023-11-28 20:36:21,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130181176] [2023-11-28 20:36:21,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:21,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 20:36:21,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:21,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 20:36:21,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-11-28 20:36:21,907 INFO L87 Difference]: Start difference. First operand 531 states and 678 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:22,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:22,854 INFO L93 Difference]: Finished difference Result 1584 states and 2020 transitions. [2023-11-28 20:36:22,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:36:22,854 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 115 [2023-11-28 20:36:22,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:22,859 INFO L225 Difference]: With dead ends: 1584 [2023-11-28 20:36:22,859 INFO L226 Difference]: Without dead ends: 1072 [2023-11-28 20:36:22,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2023-11-28 20:36:22,861 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 132 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:22,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 567 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 20:36:22,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2023-11-28 20:36:22,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 685. [2023-11-28 20:36:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 585 states have (on average 1.2273504273504274) internal successors, (718), 592 states have internal predecessors, (718), 79 states have call successors, (79), 20 states have call predecessors, (79), 20 states have return successors, (79), 72 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-28 20:36:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 876 transitions. [2023-11-28 20:36:22,913 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 876 transitions. Word has length 115 [2023-11-28 20:36:22,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:22,914 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 876 transitions. [2023-11-28 20:36:22,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:22,914 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 876 transitions. [2023-11-28 20:36:22,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-28 20:36:22,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:22,915 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:22,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-28 20:36:23,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 20:36:23,116 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:23,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:23,116 INFO L85 PathProgramCache]: Analyzing trace with hash 876300398, now seen corresponding path program 1 times [2023-11-28 20:36:23,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:23,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805657678] [2023-11-28 20:36:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:23,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:23,135 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:23,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75747068] [2023-11-28 20:36:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:23,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:23,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:23,136 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:23,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 20:36:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:23,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-28 20:36:23,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:23,974 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:36:23,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 30 [2023-11-28 20:36:23,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2023-11-28 20:36:23,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-11-28 20:36:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 182 proven. 30 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-11-28 20:36:24,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:25,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:25,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805657678] [2023-11-28 20:36:25,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:25,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75747068] [2023-11-28 20:36:25,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75747068] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:25,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:36:25,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-11-28 20:36:25,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401560909] [2023-11-28 20:36:25,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:25,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:36:25,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:25,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:36:25,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:36:25,263 INFO L87 Difference]: Start difference. First operand 685 states and 876 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:28,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:28,053 INFO L93 Difference]: Finished difference Result 1297 states and 1641 transitions. [2023-11-28 20:36:28,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:36:28,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 116 [2023-11-28 20:36:28,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:28,058 INFO L225 Difference]: With dead ends: 1297 [2023-11-28 20:36:28,058 INFO L226 Difference]: Without dead ends: 631 [2023-11-28 20:36:28,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:36:28,061 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 40 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:28,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 318 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-28 20:36:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2023-11-28 20:36:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 568. [2023-11-28 20:36:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 477 states have (on average 1.1886792452830188) internal successors, (567), 481 states have internal predecessors, (567), 70 states have call successors, (70), 20 states have call predecessors, (70), 20 states have return successors, (70), 66 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-28 20:36:28,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 707 transitions. [2023-11-28 20:36:28,106 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 707 transitions. Word has length 116 [2023-11-28 20:36:28,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:28,107 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 707 transitions. [2023-11-28 20:36:28,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 707 transitions. [2023-11-28 20:36:28,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-28 20:36:28,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:28,108 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:28,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-28 20:36:28,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 20:36:28,313 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:28,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:28,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1691077145, now seen corresponding path program 1 times [2023-11-28 20:36:28,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:28,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641415836] [2023-11-28 20:36:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:28,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:28,336 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:28,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242039477] [2023-11-28 20:36:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:28,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:28,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:28,338 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:28,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-28 20:36:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:28,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 20:36:28,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:28,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-11-28 20:36:28,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-11-28 20:36:28,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-28 20:36:28,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-28 20:36:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:28,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:36:28,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:28,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641415836] [2023-11-28 20:36:28,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:28,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242039477] [2023-11-28 20:36:28,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242039477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:28,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:36:28,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:36:28,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427832504] [2023-11-28 20:36:28,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:28,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:36:28,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:28,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:36:28,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:36:28,728 INFO L87 Difference]: Start difference. First operand 568 states and 707 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:29,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:29,093 INFO L93 Difference]: Finished difference Result 1180 states and 1454 transitions. [2023-11-28 20:36:29,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:36:29,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 116 [2023-11-28 20:36:29,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:29,096 INFO L225 Difference]: With dead ends: 1180 [2023-11-28 20:36:29,097 INFO L226 Difference]: Without dead ends: 613 [2023-11-28 20:36:29,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:36:29,098 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 117 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:29,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 296 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:36:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2023-11-28 20:36:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 546. [2023-11-28 20:36:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 455 states have (on average 1.167032967032967) internal successors, (531), 459 states have internal predecessors, (531), 70 states have call successors, (70), 20 states have call predecessors, (70), 20 states have return successors, (70), 66 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-28 20:36:29,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 671 transitions. [2023-11-28 20:36:29,166 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 671 transitions. Word has length 116 [2023-11-28 20:36:29,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:29,166 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 671 transitions. [2023-11-28 20:36:29,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:29,167 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 671 transitions. [2023-11-28 20:36:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-28 20:36:29,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:29,168 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:29,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-28 20:36:29,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 20:36:29,369 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:29,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:29,369 INFO L85 PathProgramCache]: Analyzing trace with hash 95363765, now seen corresponding path program 1 times [2023-11-28 20:36:29,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:29,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4426767] [2023-11-28 20:36:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:29,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:29,400 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:29,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425354619] [2023-11-28 20:36:29,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:29,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:29,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:29,401 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:29,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-28 20:36:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:29,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 20:36:29,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:29,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-28 20:36:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-28 20:36:29,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:29,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:29,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4426767] [2023-11-28 20:36:29,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:29,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425354619] [2023-11-28 20:36:29,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425354619] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:29,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:36:29,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 11 [2023-11-28 20:36:29,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764480949] [2023-11-28 20:36:29,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:29,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:36:29,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:29,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:36:29,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:36:29,745 INFO L87 Difference]: Start difference. First operand 546 states and 671 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:30,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:30,022 INFO L93 Difference]: Finished difference Result 1375 states and 1680 transitions. [2023-11-28 20:36:30,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:36:30,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 117 [2023-11-28 20:36:30,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:30,026 INFO L225 Difference]: With dead ends: 1375 [2023-11-28 20:36:30,026 INFO L226 Difference]: Without dead ends: 830 [2023-11-28 20:36:30,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:36:30,028 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 113 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:30,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 671 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:36:30,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2023-11-28 20:36:30,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 621. [2023-11-28 20:36:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 530 states have (on average 1.1660377358490566) internal successors, (618), 534 states have internal predecessors, (618), 70 states have call successors, (70), 20 states have call predecessors, (70), 20 states have return successors, (70), 66 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-28 20:36:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 758 transitions. [2023-11-28 20:36:30,097 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 758 transitions. Word has length 117 [2023-11-28 20:36:30,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:30,097 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 758 transitions. [2023-11-28 20:36:30,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:30,097 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 758 transitions. [2023-11-28 20:36:30,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-28 20:36:30,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:30,099 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:30,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-28 20:36:30,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:30,300 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:30,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:30,300 INFO L85 PathProgramCache]: Analyzing trace with hash -425145827, now seen corresponding path program 1 times [2023-11-28 20:36:30,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:30,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245840602] [2023-11-28 20:36:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:30,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:30,322 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:30,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272589672] [2023-11-28 20:36:30,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:30,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:30,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:30,324 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:30,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-28 20:36:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:30,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 20:36:30,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:30,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2023-11-28 20:36:30,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-28 20:36:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:30,653 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:36:30,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:30,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245840602] [2023-11-28 20:36:30,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:30,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272589672] [2023-11-28 20:36:30,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272589672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:30,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:36:30,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:36:30,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656938917] [2023-11-28 20:36:30,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:30,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:36:30,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:30,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:36:30,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:36:30,656 INFO L87 Difference]: Start difference. First operand 621 states and 758 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:31,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:31,063 INFO L93 Difference]: Finished difference Result 1353 states and 1645 transitions. [2023-11-28 20:36:31,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:36:31,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 122 [2023-11-28 20:36:31,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:31,067 INFO L225 Difference]: With dead ends: 1353 [2023-11-28 20:36:31,067 INFO L226 Difference]: Without dead ends: 733 [2023-11-28 20:36:31,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:36:31,069 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 54 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:31,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 398 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:36:31,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2023-11-28 20:36:31,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 627. [2023-11-28 20:36:31,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 536 states have (on average 1.1529850746268657) internal successors, (618), 540 states have internal predecessors, (618), 70 states have call successors, (70), 20 states have call predecessors, (70), 20 states have return successors, (70), 66 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-28 20:36:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 758 transitions. [2023-11-28 20:36:31,135 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 758 transitions. Word has length 122 [2023-11-28 20:36:31,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:31,135 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 758 transitions. [2023-11-28 20:36:31,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 758 transitions. [2023-11-28 20:36:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-28 20:36:31,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:31,138 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:31,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-28 20:36:31,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:31,338 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:31,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:31,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1093029139, now seen corresponding path program 1 times [2023-11-28 20:36:31,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:31,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520284638] [2023-11-28 20:36:31,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:31,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:31,356 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:31,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023400057] [2023-11-28 20:36:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:31,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:31,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:31,358 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:31,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-28 20:36:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:31,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:36:31,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:31,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 28 [2023-11-28 20:36:31,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-28 20:36:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:31,937 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:36:31,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:31,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520284638] [2023-11-28 20:36:31,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:31,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023400057] [2023-11-28 20:36:31,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023400057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:31,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:36:31,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:36:31,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710591412] [2023-11-28 20:36:31,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:31,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:36:31,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:31,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:36:31,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:36:31,939 INFO L87 Difference]: Start difference. First operand 627 states and 758 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:32,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:32,245 INFO L93 Difference]: Finished difference Result 1377 states and 1653 transitions. [2023-11-28 20:36:32,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:36:32,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 122 [2023-11-28 20:36:32,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:32,249 INFO L225 Difference]: With dead ends: 1377 [2023-11-28 20:36:32,249 INFO L226 Difference]: Without dead ends: 751 [2023-11-28 20:36:32,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:36:32,251 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 72 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:32,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 371 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:36:32,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-11-28 20:36:32,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 627. [2023-11-28 20:36:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 536 states have (on average 1.1417910447761195) internal successors, (612), 540 states have internal predecessors, (612), 70 states have call successors, (70), 20 states have call predecessors, (70), 20 states have return successors, (70), 66 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-28 20:36:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 752 transitions. [2023-11-28 20:36:32,295 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 752 transitions. Word has length 122 [2023-11-28 20:36:32,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:32,296 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 752 transitions. [2023-11-28 20:36:32,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 752 transitions. [2023-11-28 20:36:32,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-28 20:36:32,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:32,298 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:32,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-28 20:36:32,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-28 20:36:32,499 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:32,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:32,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1794093717, now seen corresponding path program 1 times [2023-11-28 20:36:32,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:32,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495377111] [2023-11-28 20:36:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:32,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:32,517 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:32,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54063207] [2023-11-28 20:36:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:32,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:32,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:32,519 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:32,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-28 20:36:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:32,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 20:36:32,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:32,727 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:36:32,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:32,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495377111] [2023-11-28 20:36:32,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:32,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54063207] [2023-11-28 20:36:32,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54063207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:32,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:36:32,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:36:32,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223232339] [2023-11-28 20:36:32,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:32,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:36:32,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:32,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:36:32,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:36:32,729 INFO L87 Difference]: Start difference. First operand 627 states and 752 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:32,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:32,854 INFO L93 Difference]: Finished difference Result 1281 states and 1533 transitions. [2023-11-28 20:36:32,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:36:32,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 122 [2023-11-28 20:36:32,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:32,857 INFO L225 Difference]: With dead ends: 1281 [2023-11-28 20:36:32,857 INFO L226 Difference]: Without dead ends: 655 [2023-11-28 20:36:32,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:36:32,858 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 51 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:32,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 438 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:36:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2023-11-28 20:36:32,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 621. [2023-11-28 20:36:32,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 530 states have (on average 1.1320754716981132) internal successors, (600), 534 states have internal predecessors, (600), 70 states have call successors, (70), 20 states have call predecessors, (70), 20 states have return successors, (70), 66 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-28 20:36:32,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 740 transitions. [2023-11-28 20:36:32,924 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 740 transitions. Word has length 122 [2023-11-28 20:36:32,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:32,924 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 740 transitions. [2023-11-28 20:36:32,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:32,925 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 740 transitions. [2023-11-28 20:36:32,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-28 20:36:32,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:32,926 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:32,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-28 20:36:33,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-28 20:36:33,127 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:33,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:33,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1987876225, now seen corresponding path program 1 times [2023-11-28 20:36:33,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:33,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61979226] [2023-11-28 20:36:33,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:33,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:33,146 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:33,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305061596] [2023-11-28 20:36:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:33,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:33,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:33,147 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:33,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-28 20:36:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:33,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-28 20:36:33,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:33,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:36:33,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 69 [2023-11-28 20:36:33,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2023-11-28 20:36:33,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 45 [2023-11-28 20:36:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-28 20:36:33,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:34,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-11-28 20:36:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:34,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:34,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61979226] [2023-11-28 20:36:34,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:34,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305061596] [2023-11-28 20:36:34,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305061596] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:34,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:36:34,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 20 [2023-11-28 20:36:34,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550525323] [2023-11-28 20:36:34,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:34,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 20:36:34,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:34,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 20:36:34,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2023-11-28 20:36:34,386 INFO L87 Difference]: Start difference. First operand 621 states and 740 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:36,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:36,024 INFO L93 Difference]: Finished difference Result 1601 states and 1894 transitions. [2023-11-28 20:36:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-28 20:36:36,025 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 127 [2023-11-28 20:36:36,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:36,031 INFO L225 Difference]: With dead ends: 1601 [2023-11-28 20:36:36,031 INFO L226 Difference]: Without dead ends: 981 [2023-11-28 20:36:36,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2023-11-28 20:36:36,033 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 170 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:36,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1259 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 20:36:36,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2023-11-28 20:36:36,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 756. [2023-11-28 20:36:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 665 states have (on average 1.130827067669173) internal successors, (752), 669 states have internal predecessors, (752), 70 states have call successors, (70), 20 states have call predecessors, (70), 20 states have return successors, (70), 66 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-28 20:36:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 892 transitions. [2023-11-28 20:36:36,122 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 892 transitions. Word has length 127 [2023-11-28 20:36:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:36,122 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 892 transitions. [2023-11-28 20:36:36,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:36,122 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 892 transitions. [2023-11-28 20:36:36,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-28 20:36:36,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:36,123 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:36,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-28 20:36:36,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:36,324 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:36,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:36,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1729710787, now seen corresponding path program 1 times [2023-11-28 20:36:36,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:36,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181213931] [2023-11-28 20:36:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:36,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:36,343 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:36,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876543295] [2023-11-28 20:36:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:36,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:36,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:36,345 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:36,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-28 20:36:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:36,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:36:36,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:36,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-28 20:36:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:36,616 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:36:36,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:36,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181213931] [2023-11-28 20:36:36,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:36,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876543295] [2023-11-28 20:36:36,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876543295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:36,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:36:36,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:36:36,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779996367] [2023-11-28 20:36:36,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:36,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:36:36,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:36,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:36:36,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:36:36,618 INFO L87 Difference]: Start difference. First operand 756 states and 892 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:36,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:36,854 INFO L93 Difference]: Finished difference Result 1518 states and 1786 transitions. [2023-11-28 20:36:36,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:36:36,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 127 [2023-11-28 20:36:36,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:36,859 INFO L225 Difference]: With dead ends: 1518 [2023-11-28 20:36:36,859 INFO L226 Difference]: Without dead ends: 763 [2023-11-28 20:36:36,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:36:36,860 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 164 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:36,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 495 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:36:36,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2023-11-28 20:36:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 730. [2023-11-28 20:36:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 639 states have (on average 1.1189358372456963) internal successors, (715), 643 states have internal predecessors, (715), 70 states have call successors, (70), 20 states have call predecessors, (70), 20 states have return successors, (70), 66 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-28 20:36:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 855 transitions. [2023-11-28 20:36:36,912 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 855 transitions. Word has length 127 [2023-11-28 20:36:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:36,912 INFO L495 AbstractCegarLoop]: Abstraction has 730 states and 855 transitions. [2023-11-28 20:36:36,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 855 transitions. [2023-11-28 20:36:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-28 20:36:36,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:36,914 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:36,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-28 20:36:37,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-28 20:36:37,114 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:37,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:37,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1925836611, now seen corresponding path program 1 times [2023-11-28 20:36:37,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:37,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783350197] [2023-11-28 20:36:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:37,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:37,136 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:37,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244229727] [2023-11-28 20:36:37,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:37,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:37,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:37,137 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:37,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-28 20:36:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:37,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:36:37,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:37,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-28 20:36:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:37,352 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:36:37,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:37,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783350197] [2023-11-28 20:36:37,353 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:37,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244229727] [2023-11-28 20:36:37,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244229727] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:37,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:36:37,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:36:37,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020273350] [2023-11-28 20:36:37,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:37,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:36:37,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:37,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:36:37,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:36:37,355 INFO L87 Difference]: Start difference. First operand 730 states and 855 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:37,611 INFO L93 Difference]: Finished difference Result 1620 states and 1901 transitions. [2023-11-28 20:36:37,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:36:37,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 127 [2023-11-28 20:36:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:37,617 INFO L225 Difference]: With dead ends: 1620 [2023-11-28 20:36:37,617 INFO L226 Difference]: Without dead ends: 875 [2023-11-28 20:36:37,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:36:37,619 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 132 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:37,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 439 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:36:37,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2023-11-28 20:36:37,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 657. [2023-11-28 20:36:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 566 states have (on average 1.1130742049469964) internal successors, (630), 570 states have internal predecessors, (630), 70 states have call successors, (70), 20 states have call predecessors, (70), 20 states have return successors, (70), 66 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-28 20:36:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 770 transitions. [2023-11-28 20:36:37,697 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 770 transitions. Word has length 127 [2023-11-28 20:36:37,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:37,698 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 770 transitions. [2023-11-28 20:36:37,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:37,698 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 770 transitions. [2023-11-28 20:36:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-28 20:36:37,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:37,700 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:37,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-28 20:36:37,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-28 20:36:37,900 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:37,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:37,901 INFO L85 PathProgramCache]: Analyzing trace with hash -255023038, now seen corresponding path program 1 times [2023-11-28 20:36:37,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:37,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179301945] [2023-11-28 20:36:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:37,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:37,920 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:37,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65929862] [2023-11-28 20:36:37,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:37,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:37,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:37,922 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:37,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-28 20:36:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:38,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:36:38,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:38,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-28 20:36:38,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-28 20:36:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:38,164 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:36:38,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:38,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179301945] [2023-11-28 20:36:38,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:38,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65929862] [2023-11-28 20:36:38,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65929862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:38,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:36:38,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:36:38,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894077724] [2023-11-28 20:36:38,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:38,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:36:38,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:38,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:36:38,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:36:38,167 INFO L87 Difference]: Start difference. First operand 657 states and 770 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:38,524 INFO L93 Difference]: Finished difference Result 1553 states and 1813 transitions. [2023-11-28 20:36:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:36:38,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 128 [2023-11-28 20:36:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:38,528 INFO L225 Difference]: With dead ends: 1553 [2023-11-28 20:36:38,528 INFO L226 Difference]: Without dead ends: 897 [2023-11-28 20:36:38,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:36:38,530 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 83 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:38,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 421 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:36:38,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-11-28 20:36:38,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 686. [2023-11-28 20:36:38,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 580 states have (on average 1.103448275862069) internal successors, (640), 585 states have internal predecessors, (640), 81 states have call successors, (81), 24 states have call predecessors, (81), 24 states have return successors, (81), 76 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-28 20:36:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 802 transitions. [2023-11-28 20:36:38,594 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 802 transitions. Word has length 128 [2023-11-28 20:36:38,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:38,594 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 802 transitions. [2023-11-28 20:36:38,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:38,595 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 802 transitions. [2023-11-28 20:36:38,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-28 20:36:38,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:38,596 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:38,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-28 20:36:38,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-28 20:36:38,796 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:38,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:38,797 INFO L85 PathProgramCache]: Analyzing trace with hash -451148862, now seen corresponding path program 1 times [2023-11-28 20:36:38,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:38,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585092211] [2023-11-28 20:36:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:38,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:38,819 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:38,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932750678] [2023-11-28 20:36:38,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:38,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:38,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:38,820 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:38,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-28 20:36:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:39,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:36:39,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:39,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-28 20:36:39,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-28 20:36:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:39,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:36:39,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:39,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585092211] [2023-11-28 20:36:39,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:39,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932750678] [2023-11-28 20:36:39,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932750678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:39,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:36:39,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:36:39,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717595320] [2023-11-28 20:36:39,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:39,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:36:39,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:39,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:36:39,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:36:39,068 INFO L87 Difference]: Start difference. First operand 686 states and 802 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:39,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:39,486 INFO L93 Difference]: Finished difference Result 1507 states and 1756 transitions. [2023-11-28 20:36:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:36:39,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 128 [2023-11-28 20:36:39,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:39,489 INFO L225 Difference]: With dead ends: 1507 [2023-11-28 20:36:39,489 INFO L226 Difference]: Without dead ends: 822 [2023-11-28 20:36:39,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:36:39,491 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 77 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:39,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 344 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:36:39,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2023-11-28 20:36:39,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 667. [2023-11-28 20:36:39,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 561 states have (on average 1.0962566844919786) internal successors, (615), 566 states have internal predecessors, (615), 81 states have call successors, (81), 24 states have call predecessors, (81), 24 states have return successors, (81), 76 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-28 20:36:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 777 transitions. [2023-11-28 20:36:39,554 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 777 transitions. Word has length 128 [2023-11-28 20:36:39,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:39,554 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 777 transitions. [2023-11-28 20:36:39,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 777 transitions. [2023-11-28 20:36:39,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-28 20:36:39,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:39,555 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:39,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-28 20:36:39,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-28 20:36:39,756 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:39,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:39,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1462266112, now seen corresponding path program 1 times [2023-11-28 20:36:39,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:39,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022979827] [2023-11-28 20:36:39,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:39,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:39,780 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:39,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312260007] [2023-11-28 20:36:39,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:39,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:39,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:39,781 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:39,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-28 20:36:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:39,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:36:39,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:40,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-28 20:36:40,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-28 20:36:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:40,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:36:40,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:40,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022979827] [2023-11-28 20:36:40,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:40,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312260007] [2023-11-28 20:36:40,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312260007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:40,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:36:40,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:36:40,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725823478] [2023-11-28 20:36:40,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:40,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:36:40,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:40,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:36:40,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:36:40,068 INFO L87 Difference]: Start difference. First operand 667 states and 777 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:40,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:40,427 INFO L93 Difference]: Finished difference Result 1380 states and 1608 transitions. [2023-11-28 20:36:40,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:36:40,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 128 [2023-11-28 20:36:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:40,431 INFO L225 Difference]: With dead ends: 1380 [2023-11-28 20:36:40,431 INFO L226 Difference]: Without dead ends: 714 [2023-11-28 20:36:40,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:36:40,432 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 71 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:40,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 318 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:36:40,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2023-11-28 20:36:40,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 667. [2023-11-28 20:36:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 561 states have (on average 1.0926916221033869) internal successors, (613), 566 states have internal predecessors, (613), 81 states have call successors, (81), 24 states have call predecessors, (81), 24 states have return successors, (81), 76 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-28 20:36:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 775 transitions. [2023-11-28 20:36:40,495 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 775 transitions. Word has length 128 [2023-11-28 20:36:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:40,495 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 775 transitions. [2023-11-28 20:36:40,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:40,495 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 775 transitions. [2023-11-28 20:36:40,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-28 20:36:40,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:40,497 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:40,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-28 20:36:40,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-28 20:36:40,697 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:40,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:40,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1204100674, now seen corresponding path program 1 times [2023-11-28 20:36:40,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:40,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713114412] [2023-11-28 20:36:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:40,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:40,716 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:40,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856101685] [2023-11-28 20:36:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:40,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:40,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:40,717 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:40,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-28 20:36:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:40,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:36:40,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:40,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-28 20:36:40,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-28 20:36:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:40,939 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:36:40,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:40,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713114412] [2023-11-28 20:36:40,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:40,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856101685] [2023-11-28 20:36:40,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856101685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:40,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:36:40,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:36:40,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974360325] [2023-11-28 20:36:40,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:40,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:36:40,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:40,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:36:40,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:36:40,941 INFO L87 Difference]: Start difference. First operand 667 states and 775 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:41,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:41,309 INFO L93 Difference]: Finished difference Result 1543 states and 1783 transitions. [2023-11-28 20:36:41,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:36:41,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 128 [2023-11-28 20:36:41,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:41,313 INFO L225 Difference]: With dead ends: 1543 [2023-11-28 20:36:41,313 INFO L226 Difference]: Without dead ends: 877 [2023-11-28 20:36:41,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:36:41,315 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 82 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:41,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 413 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:36:41,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2023-11-28 20:36:41,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 675. [2023-11-28 20:36:41,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 569 states have (on average 1.0913884007029877) internal successors, (621), 574 states have internal predecessors, (621), 81 states have call successors, (81), 24 states have call predecessors, (81), 24 states have return successors, (81), 76 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-28 20:36:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 783 transitions. [2023-11-28 20:36:41,378 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 783 transitions. Word has length 128 [2023-11-28 20:36:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:41,378 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 783 transitions. [2023-11-28 20:36:41,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 783 transitions. [2023-11-28 20:36:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-28 20:36:41,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:41,380 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:41,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-28 20:36:41,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-28 20:36:41,580 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:41,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:41,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1713573764, now seen corresponding path program 1 times [2023-11-28 20:36:41,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:41,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303776306] [2023-11-28 20:36:41,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:41,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:41,602 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:41,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553556805] [2023-11-28 20:36:41,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:41,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:41,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:41,604 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:41,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-28 20:36:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:43,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 120 conjunts are in the unsatisfiable core [2023-11-28 20:36:43,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:43,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-28 20:36:43,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-28 20:36:43,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:36:43,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-28 20:36:44,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 33 [2023-11-28 20:36:44,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:36:44,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 70 [2023-11-28 20:36:44,613 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:36:44,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 88 [2023-11-28 20:36:44,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:36:44,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 41 [2023-11-28 20:36:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 290 proven. 57 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-28 20:36:44,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-28 20:36:45,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:45,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303776306] [2023-11-28 20:36:45,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:45,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553556805] [2023-11-28 20:36:45,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553556805] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:45,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:36:45,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [24] total 38 [2023-11-28 20:36:45,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122228265] [2023-11-28 20:36:45,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:45,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-28 20:36:45,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:45,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-28 20:36:45,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2023-11-28 20:36:45,769 INFO L87 Difference]: Start difference. First operand 675 states and 783 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:47,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:47,143 INFO L93 Difference]: Finished difference Result 1393 states and 1614 transitions. [2023-11-28 20:36:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-28 20:36:47,144 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 128 [2023-11-28 20:36:47,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:47,144 INFO L225 Difference]: With dead ends: 1393 [2023-11-28 20:36:47,144 INFO L226 Difference]: Without dead ends: 0 [2023-11-28 20:36:47,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=281, Invalid=2269, Unknown=0, NotChecked=0, Total=2550 [2023-11-28 20:36:47,147 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 133 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:47,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 1153 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 20:36:47,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-28 20:36:47,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-28 20:36:47,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-28 20:36:47,148 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 128 [2023-11-28 20:36:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:47,148 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-28 20:36:47,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-28 20:36:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-28 20:36:47,149 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-28 20:36:47,150 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-28 20:36:47,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-28 20:36:47,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca846bd-8f80-4296-bb22-fe3fbda3258f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:47,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-28 20:45:47,722 WARN L293 SmtUtils]: Spent 9.00m on a formula simplification. DAG size of input: 245 DAG size of output: 304 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-11-28 20:48:27,608 WARN L293 SmtUtils]: Spent 2.60m on a formula simplification. DAG size of input: 221 DAG size of output: 253 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-11-28 20:48:52,435 WARN L293 SmtUtils]: Spent 21.30s on a formula simplification. DAG size of input: 160 DAG size of output: 188 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-11-28 20:49:19,261 WARN L293 SmtUtils]: Spent 21.36s on a formula simplification. DAG size of input: 160 DAG size of output: 188 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-11-28 20:49:40,817 WARN L293 SmtUtils]: Spent 21.23s on a formula simplification. DAG size of input: 160 DAG size of output: 188 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-11-28 20:50:04,564 WARN L293 SmtUtils]: Spent 21.36s on a formula simplification. DAG size of input: 160 DAG size of output: 188 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-11-28 20:50:29,123 WARN L293 SmtUtils]: Spent 21.22s on a formula simplification. DAG size of input: 155 DAG size of output: 183 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)