./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-ci_file-81.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/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_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-ci_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/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_63157bb0-91f9-4360-89f5-ffce091cadf1/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 6b77a3b8187af54765a505f7649175cf18add0380d30145d0f26a5ac8cc02bbd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:46:46,824 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:46:46,887 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 23:46:46,891 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:46:46,892 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:46:46,916 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:46:46,916 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:46:46,917 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:46:46,917 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:46:46,918 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:46:46,919 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:46:46,919 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:46:46,920 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:46:46,920 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:46:46,921 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:46:46,921 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:46:46,922 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 23:46:46,922 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:46:46,923 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:46:46,923 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:46:46,924 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:46:46,924 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 23:46:46,925 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:46:46,925 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 23:46:46,926 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:46:46,926 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 23:46:46,927 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:46:46,927 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:46:46,927 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:46:46,928 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:46:46,928 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:46:46,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:46:46,929 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:46:46,930 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:46:46,930 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 23:46:46,930 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:46:46,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:46:46,931 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:46:46,931 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:46:46,931 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 23:46:46,931 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:46:46,931 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:46:46,932 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_63157bb0-91f9-4360-89f5-ffce091cadf1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b77a3b8187af54765a505f7649175cf18add0380d30145d0f26a5ac8cc02bbd [2023-11-28 23:46:47,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:46:47,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:46:47,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:46:47,185 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:46:47,185 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:46:47,187 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-ci_file-81.i [2023-11-28 23:46:49,990 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:46:50,196 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:46:50,196 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-ci_file-81.i [2023-11-28 23:46:50,206 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/data/09334da98/86b68b10a6b444528c9302143048b6b4/FLAGbb5dc1d8a [2023-11-28 23:46:50,220 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/data/09334da98/86b68b10a6b444528c9302143048b6b4 [2023-11-28 23:46:50,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:46:50,224 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:46:50,226 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:46:50,226 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:46:50,231 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:46:50,231 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:46:50" (1/1) ... [2023-11-28 23:46:50,233 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35be3871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:50, skipping insertion in model container [2023-11-28 23:46:50,233 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:46:50" (1/1) ... [2023-11-28 23:46:50,270 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:46:50,402 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_63157bb0-91f9-4360-89f5-ffce091cadf1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-ci_file-81.i[919,932] [2023-11-28 23:46:50,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:46:50,496 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:46:50,506 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_63157bb0-91f9-4360-89f5-ffce091cadf1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-ci_file-81.i[919,932] [2023-11-28 23:46:50,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:46:50,565 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:46:50,565 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:50 WrapperNode [2023-11-28 23:46:50,566 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:46:50,566 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:46:50,567 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:46:50,567 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:46:50,573 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:50" (1/1) ... [2023-11-28 23:46:50,585 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:50" (1/1) ... [2023-11-28 23:46:50,632 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 258 [2023-11-28 23:46:50,632 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:46:50,633 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:46:50,633 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:46:50,633 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:46:50,645 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:50" (1/1) ... [2023-11-28 23:46:50,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:50" (1/1) ... [2023-11-28 23:46:50,650 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:50" (1/1) ... [2023-11-28 23:46:50,672 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-28 23:46:50,672 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:50" (1/1) ... [2023-11-28 23:46:50,673 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:50" (1/1) ... [2023-11-28 23:46:50,690 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:50" (1/1) ... [2023-11-28 23:46:50,695 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:50" (1/1) ... [2023-11-28 23:46:50,698 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:50" (1/1) ... [2023-11-28 23:46:50,702 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:50" (1/1) ... [2023-11-28 23:46:50,709 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:46:50,710 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:46:50,710 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:46:50,710 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:46:50,711 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:50" (1/1) ... [2023-11-28 23:46:50,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:46:50,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:46:50,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:46:50,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:46:50,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:46:50,778 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-28 23:46:50,779 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-28 23:46:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:46:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:46:50,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:46:50,875 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:46:50,877 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:46:51,317 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:46:51,359 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:46:51,359 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-28 23:46:51,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:46:51 BoogieIcfgContainer [2023-11-28 23:46:51,360 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:46:51,363 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:46:51,363 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:46:51,366 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:46:51,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:46:50" (1/3) ... [2023-11-28 23:46:51,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4711aa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:46:51, skipping insertion in model container [2023-11-28 23:46:51,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:46:50" (2/3) ... [2023-11-28 23:46:51,368 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4711aa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:46:51, skipping insertion in model container [2023-11-28 23:46:51,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:46:51" (3/3) ... [2023-11-28 23:46:51,370 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pe-ci_file-81.i [2023-11-28 23:46:51,389 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:46:51,389 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 23:46:51,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:46:51,439 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;@f7fc6c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:46:51,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 23:46:51,445 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 63 states have internal predecessors, (96), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-28 23:46:51,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-28 23:46:51,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:51,464 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:51,464 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:51,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:51,468 INFO L85 PathProgramCache]: Analyzing trace with hash -331034907, now seen corresponding path program 1 times [2023-11-28 23:46:51,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:51,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186248212] [2023-11-28 23:46:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:51,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:51,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:51,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186248212] [2023-11-28 23:46:51,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-28 23:46:51,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547791974] [2023-11-28 23:46:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:51,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:51,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:46:51,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:46:51,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 23:46:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:51,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-28 23:46:51,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:46:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2023-11-28 23:46:51,994 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:46:51,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547791974] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:51,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:51,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:46:51,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828458572] [2023-11-28 23:46:51,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:52,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 23:46:52,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:52,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 23:46:52,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 23:46:52,039 INFO L87 Difference]: Start difference. First operand has 96 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 63 states have internal predecessors, (96), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-28 23:46:52,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:52,085 INFO L93 Difference]: Finished difference Result 189 states and 345 transitions. [2023-11-28 23:46:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 23:46:52,087 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) Word has length 198 [2023-11-28 23:46:52,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:52,096 INFO L225 Difference]: With dead ends: 189 [2023-11-28 23:46:52,096 INFO L226 Difference]: Without dead ends: 94 [2023-11-28 23:46:52,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 23:46:52,103 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:52,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:46:52,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-28 23:46:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-28 23:46:52,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-28 23:46:52,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 153 transitions. [2023-11-28 23:46:52,154 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 153 transitions. Word has length 198 [2023-11-28 23:46:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:52,155 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 153 transitions. [2023-11-28 23:46:52,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-28 23:46:52,156 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 153 transitions. [2023-11-28 23:46:52,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-28 23:46:52,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:52,162 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:52,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 23:46:52,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-28 23:46:52,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:52,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:52,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1078675281, now seen corresponding path program 1 times [2023-11-28 23:46:52,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:52,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618273017] [2023-11-28 23:46:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:52,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:52,433 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:46:52,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356542323] [2023-11-28 23:46:52,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:52,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:52,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:46:52,435 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:46:52,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 23:46:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:52,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 23:46:52,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:46:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-28 23:46:52,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:46:52,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:52,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618273017] [2023-11-28 23:46:52,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:46:52,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356542323] [2023-11-28 23:46:52,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356542323] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:52,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:52,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:46:52,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118050556] [2023-11-28 23:46:52,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:52,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:46:52,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:52,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:46:52,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:46:52,728 INFO L87 Difference]: Start difference. First operand 94 states and 153 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:46:52,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:52,876 INFO L93 Difference]: Finished difference Result 274 states and 444 transitions. [2023-11-28 23:46:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:46:52,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 198 [2023-11-28 23:46:52,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:52,881 INFO L225 Difference]: With dead ends: 274 [2023-11-28 23:46:52,881 INFO L226 Difference]: Without dead ends: 181 [2023-11-28 23:46:52,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:46:52,884 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 135 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:52,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 389 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:46:52,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-28 23:46:52,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 175. [2023-11-28 23:46:52,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 130 states have (on average 1.5384615384615385) internal successors, (200), 132 states have internal predecessors, (200), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-28 23:46:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 282 transitions. [2023-11-28 23:46:52,913 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 282 transitions. Word has length 198 [2023-11-28 23:46:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:52,914 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 282 transitions. [2023-11-28 23:46:52,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:46:52,915 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 282 transitions. [2023-11-28 23:46:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-28 23:46:52,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:52,920 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:52,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 23:46:53,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:53,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:53,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:53,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1222147309, now seen corresponding path program 1 times [2023-11-28 23:46:53,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:53,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478535897] [2023-11-28 23:46:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:53,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:53,175 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:46:53,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517354658] [2023-11-28 23:46:53,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:53,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:53,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:46:53,178 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:46:53,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 23:46:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:53,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 23:46:53,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:46:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-28 23:46:53,387 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:46:53,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:53,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478535897] [2023-11-28 23:46:53,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:46:53,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517354658] [2023-11-28 23:46:53,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517354658] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:53,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:53,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:46:53,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787512554] [2023-11-28 23:46:53,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:53,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:46:53,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:53,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:46:53,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:46:53,391 INFO L87 Difference]: Start difference. First operand 175 states and 282 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:46:53,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:53,503 INFO L93 Difference]: Finished difference Result 415 states and 665 transitions. [2023-11-28 23:46:53,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:46:53,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 198 [2023-11-28 23:46:53,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:53,508 INFO L225 Difference]: With dead ends: 415 [2023-11-28 23:46:53,508 INFO L226 Difference]: Without dead ends: 241 [2023-11-28 23:46:53,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:46:53,511 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 165 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:53,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 370 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:46:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-11-28 23:46:53,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 219. [2023-11-28 23:46:53,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 169 states have (on average 1.544378698224852) internal successors, (261), 172 states have internal predecessors, (261), 45 states have call successors, (45), 4 states have call predecessors, (45), 4 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-28 23:46:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 351 transitions. [2023-11-28 23:46:53,540 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 351 transitions. Word has length 198 [2023-11-28 23:46:53,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:53,541 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 351 transitions. [2023-11-28 23:46:53,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:46:53,542 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 351 transitions. [2023-11-28 23:46:53,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-28 23:46:53,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:53,546 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:53,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 23:46:53,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-28 23:46:53,749 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:53,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:53,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1527348273, now seen corresponding path program 1 times [2023-11-28 23:46:53,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:53,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925054856] [2023-11-28 23:46:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:53,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:53,790 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:46:53,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985770524] [2023-11-28 23:46:53,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:53,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:53,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:46:53,792 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:46:53,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 23:46:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:53,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-28 23:46:53,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:46:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 750 proven. 66 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2023-11-28 23:46:54,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:46:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 24 proven. 66 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-28 23:46:54,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:54,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925054856] [2023-11-28 23:46:54,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:46:54,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985770524] [2023-11-28 23:46:54,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985770524] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:46:54,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:46:54,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-28 23:46:54,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696292682] [2023-11-28 23:46:54,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:46:54,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 23:46:54,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:54,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 23:46:54,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-28 23:46:54,515 INFO L87 Difference]: Start difference. First operand 219 states and 351 transitions. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2023-11-28 23:46:55,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:55,106 INFO L93 Difference]: Finished difference Result 527 states and 829 transitions. [2023-11-28 23:46:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 23:46:55,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) Word has length 198 [2023-11-28 23:46:55,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:55,111 INFO L225 Difference]: With dead ends: 527 [2023-11-28 23:46:55,111 INFO L226 Difference]: Without dead ends: 309 [2023-11-28 23:46:55,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-11-28 23:46:55,113 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 302 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:55,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 419 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 23:46:55,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-11-28 23:46:55,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 223. [2023-11-28 23:46:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 172 states have (on average 1.4651162790697674) internal successors, (252), 175 states have internal predecessors, (252), 45 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-28 23:46:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 342 transitions. [2023-11-28 23:46:55,145 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 342 transitions. Word has length 198 [2023-11-28 23:46:55,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:55,146 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 342 transitions. [2023-11-28 23:46:55,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2023-11-28 23:46:55,147 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 342 transitions. [2023-11-28 23:46:55,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-28 23:46:55,150 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:55,150 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:55,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-28 23:46:55,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:55,353 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:55,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:55,353 INFO L85 PathProgramCache]: Analyzing trace with hash 879748644, now seen corresponding path program 1 times [2023-11-28 23:46:55,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:55,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638615418] [2023-11-28 23:46:55,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:55,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:55,395 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:46:55,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282754041] [2023-11-28 23:46:55,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:55,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:55,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:46:55,397 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:46:55,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 23:46:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:55,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 23:46:55,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:46:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-28 23:46:55,583 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:46:55,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:55,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638615418] [2023-11-28 23:46:55,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:46:55,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282754041] [2023-11-28 23:46:55,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282754041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:55,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:55,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:46:55,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494566514] [2023-11-28 23:46:55,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:55,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:46:55,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:55,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:46:55,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:46:55,587 INFO L87 Difference]: Start difference. First operand 223 states and 342 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:46:55,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:55,779 INFO L93 Difference]: Finished difference Result 546 states and 836 transitions. [2023-11-28 23:46:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:46:55,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 200 [2023-11-28 23:46:55,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:55,783 INFO L225 Difference]: With dead ends: 546 [2023-11-28 23:46:55,783 INFO L226 Difference]: Without dead ends: 303 [2023-11-28 23:46:55,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:46:55,785 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 155 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:55,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 473 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 23:46:55,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-11-28 23:46:55,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 227. [2023-11-28 23:46:55,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 176 states have (on average 1.4545454545454546) internal successors, (256), 179 states have internal predecessors, (256), 45 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-28 23:46:55,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 346 transitions. [2023-11-28 23:46:55,812 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 346 transitions. Word has length 200 [2023-11-28 23:46:55,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:55,813 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 346 transitions. [2023-11-28 23:46:55,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:46:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 346 transitions. [2023-11-28 23:46:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-28 23:46:55,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:55,817 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:55,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-28 23:46:56,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:56,017 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:56,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:56,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1860034967, now seen corresponding path program 1 times [2023-11-28 23:46:56,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:56,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096235083] [2023-11-28 23:46:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:56,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:56,048 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:46:56,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091865439] [2023-11-28 23:46:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:56,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:56,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:46:56,050 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:46:56,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 23:46:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:56,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 23:46:56,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:46:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-28 23:46:56,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:46:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-28 23:46:56,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:56,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096235083] [2023-11-28 23:46:56,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:46:56,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091865439] [2023-11-28 23:46:56,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091865439] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:46:56,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:46:56,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-28 23:46:56,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523855054] [2023-11-28 23:46:56,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:46:56,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-28 23:46:56,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:56,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-28 23:46:56,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-28 23:46:56,785 INFO L87 Difference]: Start difference. First operand 227 states and 346 transitions. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 3 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 3 states have call successors, (62) [2023-11-28 23:46:57,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:57,964 INFO L93 Difference]: Finished difference Result 1212 states and 1735 transitions. [2023-11-28 23:46:57,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-28 23:46:57,965 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 3 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 3 states have call successors, (62) Word has length 201 [2023-11-28 23:46:57,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:57,973 INFO L225 Difference]: With dead ends: 1212 [2023-11-28 23:46:57,973 INFO L226 Difference]: Without dead ends: 986 [2023-11-28 23:46:57,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 394 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=427, Invalid=1213, Unknown=0, NotChecked=0, Total=1640 [2023-11-28 23:46:57,976 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 483 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:57,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 645 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 23:46:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2023-11-28 23:46:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 507. [2023-11-28 23:46:58,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 419 states have (on average 1.441527446300716) internal successors, (604), 426 states have internal predecessors, (604), 69 states have call successors, (69), 18 states have call predecessors, (69), 18 states have return successors, (69), 62 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-28 23:46:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 742 transitions. [2023-11-28 23:46:58,038 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 742 transitions. Word has length 201 [2023-11-28 23:46:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:58,039 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 742 transitions. [2023-11-28 23:46:58,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 3 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 3 states have call successors, (62) [2023-11-28 23:46:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 742 transitions. [2023-11-28 23:46:58,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-28 23:46:58,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:58,043 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:58,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-28 23:46:58,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:58,244 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:58,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:58,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1550222122, now seen corresponding path program 1 times [2023-11-28 23:46:58,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:58,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512481403] [2023-11-28 23:46:58,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:58,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:58,271 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:46:58,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427760669] [2023-11-28 23:46:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:58,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:58,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:46:58,273 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:46:58,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 23:46:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:58,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 23:46:58,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:46:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 750 proven. 66 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2023-11-28 23:46:58,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:46:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 24 proven. 66 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-28 23:46:58,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:58,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512481403] [2023-11-28 23:46:58,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:46:58,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427760669] [2023-11-28 23:46:58,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427760669] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:46:58,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:46:58,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2023-11-28 23:46:58,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499591198] [2023-11-28 23:46:58,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:46:58,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 23:46:58,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:58,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 23:46:58,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-28 23:46:58,866 INFO L87 Difference]: Start difference. First operand 507 states and 742 transitions. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2023-11-28 23:46:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:46:59,447 INFO L93 Difference]: Finished difference Result 1121 states and 1634 transitions. [2023-11-28 23:46:59,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-28 23:46:59,448 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) Word has length 201 [2023-11-28 23:46:59,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:46:59,453 INFO L225 Difference]: With dead ends: 1121 [2023-11-28 23:46:59,453 INFO L226 Difference]: Without dead ends: 615 [2023-11-28 23:46:59,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2023-11-28 23:46:59,456 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 306 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:46:59,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 541 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:46:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-11-28 23:46:59,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 507. [2023-11-28 23:46:59,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 419 states have (on average 1.431980906921241) internal successors, (600), 426 states have internal predecessors, (600), 69 states have call successors, (69), 18 states have call predecessors, (69), 18 states have return successors, (69), 62 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-28 23:46:59,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 738 transitions. [2023-11-28 23:46:59,502 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 738 transitions. Word has length 201 [2023-11-28 23:46:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:46:59,503 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 738 transitions. [2023-11-28 23:46:59,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2023-11-28 23:46:59,503 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 738 transitions. [2023-11-28 23:46:59,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-28 23:46:59,507 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:46:59,507 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:59,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 23:46:59,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:59,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:46:59,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:59,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1736720385, now seen corresponding path program 1 times [2023-11-28 23:46:59,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:59,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038197902] [2023-11-28 23:46:59,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:59,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:59,738 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:46:59,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729577667] [2023-11-28 23:46:59,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:59,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:59,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:46:59,740 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:46:59,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 23:46:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:59,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 23:46:59,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:47:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 800 proven. 147 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2023-11-28 23:47:00,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:47:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 27 proven. 150 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2023-11-28 23:47:00,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:47:00,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038197902] [2023-11-28 23:47:00,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:47:00,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729577667] [2023-11-28 23:47:00,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729577667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:47:00,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:47:00,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-28 23:47:00,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426955698] [2023-11-28 23:47:00,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:47:00,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-28 23:47:00,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:47:00,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-28 23:47:00,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-28 23:47:00,763 INFO L87 Difference]: Start difference. First operand 507 states and 738 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 5 states have call successors, (61), 3 states have call predecessors, (61), 7 states have return successors, (62), 4 states have call predecessors, (62), 5 states have call successors, (62) [2023-11-28 23:47:01,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:47:01,646 INFO L93 Difference]: Finished difference Result 1143 states and 1637 transitions. [2023-11-28 23:47:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-28 23:47:01,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 5 states have call successors, (61), 3 states have call predecessors, (61), 7 states have return successors, (62), 4 states have call predecessors, (62), 5 states have call successors, (62) Word has length 202 [2023-11-28 23:47:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:47:01,652 INFO L225 Difference]: With dead ends: 1143 [2023-11-28 23:47:01,652 INFO L226 Difference]: Without dead ends: 637 [2023-11-28 23:47:01,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=340, Invalid=782, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 23:47:01,655 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 582 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 23:47:01,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 516 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 23:47:01,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2023-11-28 23:47:01,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 428. [2023-11-28 23:47:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 339 states have (on average 1.3628318584070795) internal successors, (462), 346 states have internal predecessors, (462), 69 states have call successors, (69), 19 states have call predecessors, (69), 19 states have return successors, (69), 62 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-28 23:47:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 600 transitions. [2023-11-28 23:47:01,700 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 600 transitions. Word has length 202 [2023-11-28 23:47:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:47:01,701 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 600 transitions. [2023-11-28 23:47:01,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 5 states have call successors, (61), 3 states have call predecessors, (61), 7 states have return successors, (62), 4 states have call predecessors, (62), 5 states have call successors, (62) [2023-11-28 23:47:01,701 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 600 transitions. [2023-11-28 23:47:01,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-28 23:47:01,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:47:01,703 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:47:01,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 23:47:01,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:47:01,904 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:47:01,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:47:01,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1744773667, now seen corresponding path program 1 times [2023-11-28 23:47:01,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:47:01,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337783707] [2023-11-28 23:47:01,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:47:01,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:47:01,925 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:47:01,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597755373] [2023-11-28 23:47:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:47:01,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:47:01,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:47:01,927 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:47:01,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 23:47:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:47:02,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-28 23:47:02,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:47:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 888 proven. 486 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2023-11-28 23:47:37,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:47:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-28 23:47:46,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:47:46,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337783707] [2023-11-28 23:47:46,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:47:46,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597755373] [2023-11-28 23:47:46,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597755373] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 23:47:46,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 23:47:46,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [40] total 47 [2023-11-28 23:47:46,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28823877] [2023-11-28 23:47:46,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:47:46,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 23:47:46,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:47:46,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 23:47:46,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1703, Unknown=0, NotChecked=0, Total=2162 [2023-11-28 23:47:46,582 INFO L87 Difference]: Start difference. First operand 428 states and 600 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:47:52,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:47:52,564 INFO L93 Difference]: Finished difference Result 1234 states and 1737 transitions. [2023-11-28 23:47:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 23:47:52,565 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 202 [2023-11-28 23:47:52,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:47:52,570 INFO L225 Difference]: With dead ends: 1234 [2023-11-28 23:47:52,571 INFO L226 Difference]: Without dead ends: 807 [2023-11-28 23:47:52,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=509, Invalid=2246, Unknown=1, NotChecked=0, Total=2756 [2023-11-28 23:47:52,573 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 356 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:47:52,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 666 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-28 23:47:52,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2023-11-28 23:47:52,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 455. [2023-11-28 23:47:52,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 366 states have (on average 1.3633879781420766) internal successors, (499), 373 states have internal predecessors, (499), 69 states have call successors, (69), 19 states have call predecessors, (69), 19 states have return successors, (69), 62 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-28 23:47:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 637 transitions. [2023-11-28 23:47:52,626 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 637 transitions. Word has length 202 [2023-11-28 23:47:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:47:52,626 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 637 transitions. [2023-11-28 23:47:52,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:47:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 637 transitions. [2023-11-28 23:47:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-28 23:47:52,628 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:47:52,628 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:47:52,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-28 23:47:52,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:47:52,829 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:47:52,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:47:52,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1610760161, now seen corresponding path program 1 times [2023-11-28 23:47:52,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:47:52,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625629031] [2023-11-28 23:47:52,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:47:52,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:47:52,856 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:47:52,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700149831] [2023-11-28 23:47:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:47:52,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:47:52,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:47:52,858 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:47:52,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 23:47:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:47:53,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-28 23:47:53,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:47:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 36 proven. 171 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2023-11-28 23:47:53,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:47:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-28 23:47:54,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:47:54,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625629031] [2023-11-28 23:47:54,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:47:54,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700149831] [2023-11-28 23:47:54,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700149831] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:47:54,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:47:54,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2023-11-28 23:47:54,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213170599] [2023-11-28 23:47:54,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:47:54,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-28 23:47:54,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:47:54,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 23:47:54,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-11-28 23:47:54,624 INFO L87 Difference]: Start difference. First operand 455 states and 637 transitions. Second operand has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 20 states have internal predecessors, (86), 4 states have call successors, (62), 3 states have call predecessors, (62), 5 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-28 23:47:55,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:47:55,991 INFO L93 Difference]: Finished difference Result 1389 states and 1960 transitions. [2023-11-28 23:47:55,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-28 23:47:55,991 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 20 states have internal predecessors, (86), 4 states have call successors, (62), 3 states have call predecessors, (62), 5 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) Word has length 202 [2023-11-28 23:47:55,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:47:55,996 INFO L225 Difference]: With dead ends: 1389 [2023-11-28 23:47:55,996 INFO L226 Difference]: Without dead ends: 935 [2023-11-28 23:47:55,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 23:47:55,998 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 921 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:47:55,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 804 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-28 23:47:56,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2023-11-28 23:47:56,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 538. [2023-11-28 23:47:56,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 413 states have (on average 1.334140435835351) internal successors, (551), 420 states have internal predecessors, (551), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 93 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-28 23:47:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 751 transitions. [2023-11-28 23:47:56,077 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 751 transitions. Word has length 202 [2023-11-28 23:47:56,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:47:56,078 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 751 transitions. [2023-11-28 23:47:56,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 20 states have internal predecessors, (86), 4 states have call successors, (62), 3 states have call predecessors, (62), 5 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-28 23:47:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 751 transitions. [2023-11-28 23:47:56,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-28 23:47:56,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:47:56,080 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:47:56,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 23:47:56,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 23:47:56,281 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:47:56,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:47:56,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1682734053, now seen corresponding path program 1 times [2023-11-28 23:47:56,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:47:56,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709706254] [2023-11-28 23:47:56,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:47:56,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:47:56,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:47:56,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285917668] [2023-11-28 23:47:56,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:47:56,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:47:56,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:47:56,309 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:47:56,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 23:47:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:47:56,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:47:56,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:47:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-28 23:47:56,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:47:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-28 23:47:57,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:47:57,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709706254] [2023-11-28 23:47:57,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:47:57,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285917668] [2023-11-28 23:47:57,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285917668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:47:57,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:47:57,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-28 23:47:57,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046445191] [2023-11-28 23:47:57,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:47:57,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-28 23:47:57,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:47:57,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-28 23:47:57,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-28 23:47:57,311 INFO L87 Difference]: Start difference. First operand 538 states and 751 transitions. Second operand has 16 states, 15 states have (on average 5.4) internal successors, (81), 16 states have internal predecessors, (81), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-28 23:47:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:47:58,803 INFO L93 Difference]: Finished difference Result 1484 states and 2083 transitions. [2023-11-28 23:47:58,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-28 23:47:58,803 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.4) internal successors, (81), 16 states have internal predecessors, (81), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) Word has length 202 [2023-11-28 23:47:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:47:58,808 INFO L225 Difference]: With dead ends: 1484 [2023-11-28 23:47:58,808 INFO L226 Difference]: Without dead ends: 1024 [2023-11-28 23:47:58,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=370, Invalid=962, Unknown=0, NotChecked=0, Total=1332 [2023-11-28 23:47:58,811 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 1065 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:47:58,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1065 Valid, 663 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-28 23:47:58,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2023-11-28 23:47:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 756. [2023-11-28 23:47:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 596 states have (on average 1.3238255033557047) internal successors, (789), 607 states have internal predecessors, (789), 125 states have call successors, (125), 34 states have call predecessors, (125), 34 states have return successors, (125), 114 states have call predecessors, (125), 125 states have call successors, (125) [2023-11-28 23:47:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1039 transitions. [2023-11-28 23:47:58,990 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1039 transitions. Word has length 202 [2023-11-28 23:47:58,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:47:58,990 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 1039 transitions. [2023-11-28 23:47:58,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.4) internal successors, (81), 16 states have internal predecessors, (81), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-28 23:47:58,991 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1039 transitions. [2023-11-28 23:47:58,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-28 23:47:58,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:47:58,993 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:47:59,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 23:47:59,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-28 23:47:59,195 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:47:59,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:47:59,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2048744804, now seen corresponding path program 1 times [2023-11-28 23:47:59,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:47:59,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502027239] [2023-11-28 23:47:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:47:59,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:47:59,213 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:47:59,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200180644] [2023-11-28 23:47:59,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:47:59,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:47:59,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:47:59,214 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:47:59,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 23:47:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:47:59,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-28 23:47:59,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:48:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-28 23:48:03,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:48:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-28 23:48:25,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:48:25,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502027239] [2023-11-28 23:48:25,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:48:25,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200180644] [2023-11-28 23:48:25,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200180644] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 23:48:25,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 23:48:25,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 25 [2023-11-28 23:48:25,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700403742] [2023-11-28 23:48:25,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:48:25,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-28 23:48:25,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:48:25,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-28 23:48:25,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2023-11-28 23:48:25,933 INFO L87 Difference]: Start difference. First operand 756 states and 1039 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:48:28,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:48:28,143 INFO L93 Difference]: Finished difference Result 1408 states and 1955 transitions. [2023-11-28 23:48:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-28 23:48:28,144 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 202 [2023-11-28 23:48:28,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:48:28,148 INFO L225 Difference]: With dead ends: 1408 [2023-11-28 23:48:28,148 INFO L226 Difference]: Without dead ends: 956 [2023-11-28 23:48:28,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2023-11-28 23:48:28,150 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 471 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 23:48:28,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 782 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 23:48:28,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2023-11-28 23:48:28,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 793. [2023-11-28 23:48:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 633 states have (on average 1.3364928909952607) internal successors, (846), 644 states have internal predecessors, (846), 125 states have call successors, (125), 34 states have call predecessors, (125), 34 states have return successors, (125), 114 states have call predecessors, (125), 125 states have call successors, (125) [2023-11-28 23:48:28,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1096 transitions. [2023-11-28 23:48:28,254 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1096 transitions. Word has length 202 [2023-11-28 23:48:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:48:28,255 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1096 transitions. [2023-11-28 23:48:28,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:48:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1096 transitions. [2023-11-28 23:48:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-28 23:48:28,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:48:28,257 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:48:28,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-28 23:48:28,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:48:28,457 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:48:28,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:48:28,458 INFO L85 PathProgramCache]: Analyzing trace with hash 256549794, now seen corresponding path program 1 times [2023-11-28 23:48:28,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:48:28,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451978856] [2023-11-28 23:48:28,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:48:28,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:48:28,479 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:48:28,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496045310] [2023-11-28 23:48:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:48:28,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:48:28,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:48:28,480 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:48:28,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 23:48:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:48:28,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 23:48:28,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:48:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-28 23:48:28,644 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:48:28,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:48:28,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451978856] [2023-11-28 23:48:28,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:48:28,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496045310] [2023-11-28 23:48:28,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496045310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:48:28,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:48:28,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:48:28,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536779496] [2023-11-28 23:48:28,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:48:28,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:48:28,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:48:28,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:48:28,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:48:28,646 INFO L87 Difference]: Start difference. First operand 793 states and 1096 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:48:28,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:48:28,860 INFO L93 Difference]: Finished difference Result 1324 states and 1811 transitions. [2023-11-28 23:48:28,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:48:28,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 202 [2023-11-28 23:48:28,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:48:28,864 INFO L225 Difference]: With dead ends: 1324 [2023-11-28 23:48:28,864 INFO L226 Difference]: Without dead ends: 728 [2023-11-28 23:48:28,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:48:28,866 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 104 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:48:28,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 366 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:48:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2023-11-28 23:48:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 634. [2023-11-28 23:48:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 503 states have (on average 1.2962226640159045) internal successors, (652), 508 states have internal predecessors, (652), 101 states have call successors, (101), 29 states have call predecessors, (101), 29 states have return successors, (101), 96 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-28 23:48:28,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 854 transitions. [2023-11-28 23:48:28,950 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 854 transitions. Word has length 202 [2023-11-28 23:48:28,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:48:28,950 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 854 transitions. [2023-11-28 23:48:28,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:48:28,951 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 854 transitions. [2023-11-28 23:48:28,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-28 23:48:28,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:48:28,952 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:48:28,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 23:48:29,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:48:29,153 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:48:29,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:48:29,153 INFO L85 PathProgramCache]: Analyzing trace with hash -2027367774, now seen corresponding path program 1 times [2023-11-28 23:48:29,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:48:29,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675326887] [2023-11-28 23:48:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:48:29,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:48:29,177 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:48:29,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505770660] [2023-11-28 23:48:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:48:29,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:48:29,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:48:29,179 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:48:29,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 23:48:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:48:29,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-28 23:48:29,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:48:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-28 23:48:32,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:48:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-28 23:48:39,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:48:39,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675326887] [2023-11-28 23:48:39,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:48:39,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505770660] [2023-11-28 23:48:39,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505770660] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 23:48:39,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 23:48:39,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 25 [2023-11-28 23:48:39,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422355345] [2023-11-28 23:48:39,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:48:39,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-28 23:48:39,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:48:39,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-28 23:48:39,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2023-11-28 23:48:39,375 INFO L87 Difference]: Start difference. First operand 634 states and 854 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:48:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:48:41,549 INFO L93 Difference]: Finished difference Result 1056 states and 1425 transitions. [2023-11-28 23:48:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-28 23:48:41,550 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 202 [2023-11-28 23:48:41,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:48:41,553 INFO L225 Difference]: With dead ends: 1056 [2023-11-28 23:48:41,553 INFO L226 Difference]: Without dead ends: 694 [2023-11-28 23:48:41,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=315, Invalid=945, Unknown=0, NotChecked=0, Total=1260 [2023-11-28 23:48:41,555 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 401 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 23:48:41,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 694 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 23:48:41,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2023-11-28 23:48:41,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 654. [2023-11-28 23:48:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 523 states have (on average 1.3021032504780115) internal successors, (681), 528 states have internal predecessors, (681), 101 states have call successors, (101), 29 states have call predecessors, (101), 29 states have return successors, (101), 96 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-28 23:48:41,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 883 transitions. [2023-11-28 23:48:41,658 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 883 transitions. Word has length 202 [2023-11-28 23:48:41,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:48:41,658 INFO L495 AbstractCegarLoop]: Abstraction has 654 states and 883 transitions. [2023-11-28 23:48:41,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:48:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 883 transitions. [2023-11-28 23:48:41,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-28 23:48:41,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:48:41,661 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:48:41,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-28 23:48:41,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 23:48:41,861 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:48:41,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:48:41,862 INFO L85 PathProgramCache]: Analyzing trace with hash -753679704, now seen corresponding path program 1 times [2023-11-28 23:48:41,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:48:41,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113912249] [2023-11-28 23:48:41,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:48:41,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:48:41,881 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:48:41,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669983644] [2023-11-28 23:48:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:48:41,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:48:41,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:48:41,883 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:48:41,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 23:48:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:48:42,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-28 23:48:42,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:49:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-28 23:49:10,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:49:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-28 23:49:19,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:49:19,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113912249] [2023-11-28 23:49:19,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:49:19,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669983644] [2023-11-28 23:49:19,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669983644] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 23:49:19,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 23:49:19,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 21 [2023-11-28 23:49:19,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514870033] [2023-11-28 23:49:19,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:49:19,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 23:49:19,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:49:19,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 23:49:19,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-11-28 23:49:19,192 INFO L87 Difference]: Start difference. First operand 654 states and 883 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:49:21,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:49:21,523 INFO L93 Difference]: Finished difference Result 1224 states and 1641 transitions. [2023-11-28 23:49:21,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 23:49:21,523 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 203 [2023-11-28 23:49:21,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:49:21,528 INFO L225 Difference]: With dead ends: 1224 [2023-11-28 23:49:21,528 INFO L226 Difference]: Without dead ends: 798 [2023-11-28 23:49:21,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2023-11-28 23:49:21,530 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 310 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:49:21,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 456 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-28 23:49:21,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2023-11-28 23:49:21,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 703. [2023-11-28 23:49:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 572 states have (on average 1.3041958041958042) internal successors, (746), 577 states have internal predecessors, (746), 101 states have call successors, (101), 29 states have call predecessors, (101), 29 states have return successors, (101), 96 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-28 23:49:21,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 948 transitions. [2023-11-28 23:49:21,680 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 948 transitions. Word has length 203 [2023-11-28 23:49:21,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:49:21,680 INFO L495 AbstractCegarLoop]: Abstraction has 703 states and 948 transitions. [2023-11-28 23:49:21,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:49:21,681 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 948 transitions. [2023-11-28 23:49:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-28 23:49:21,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:49:21,683 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:49:21,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-28 23:49:21,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 23:49:21,884 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:49:21,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:49:21,884 INFO L85 PathProgramCache]: Analyzing trace with hash 328837442, now seen corresponding path program 1 times [2023-11-28 23:49:21,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:49:21,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735604861] [2023-11-28 23:49:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:21,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:49:21,909 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:49:21,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333748657] [2023-11-28 23:49:21,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:21,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:49:21,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:49:21,911 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:49:21,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 23:49:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:49:22,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 23:49:22,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:49:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-28 23:49:22,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:49:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-28 23:49:22,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:49:22,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735604861] [2023-11-28 23:49:22,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:49:22,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333748657] [2023-11-28 23:49:22,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333748657] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:49:22,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:49:22,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-11-28 23:49:22,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938190305] [2023-11-28 23:49:22,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:49:22,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-28 23:49:22,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:49:22,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-28 23:49:22,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-28 23:49:22,859 INFO L87 Difference]: Start difference. First operand 703 states and 948 transitions. Second operand has 15 states, 14 states have (on average 5.857142857142857) internal successors, (82), 15 states have internal predecessors, (82), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-28 23:49:23,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:49:23,880 INFO L93 Difference]: Finished difference Result 1439 states and 1921 transitions. [2023-11-28 23:49:23,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-28 23:49:23,881 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.857142857142857) internal successors, (82), 15 states have internal predecessors, (82), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) Word has length 203 [2023-11-28 23:49:23,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:49:23,886 INFO L225 Difference]: With dead ends: 1439 [2023-11-28 23:49:23,886 INFO L226 Difference]: Without dead ends: 918 [2023-11-28 23:49:23,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 393 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2023-11-28 23:49:23,888 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 864 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:49:23,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 546 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 23:49:23,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2023-11-28 23:49:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 663. [2023-11-28 23:49:23,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 532 states have (on average 1.2894736842105263) internal successors, (686), 537 states have internal predecessors, (686), 101 states have call successors, (101), 29 states have call predecessors, (101), 29 states have return successors, (101), 96 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-28 23:49:24,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 888 transitions. [2023-11-28 23:49:24,001 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 888 transitions. Word has length 203 [2023-11-28 23:49:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:49:24,001 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 888 transitions. [2023-11-28 23:49:24,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.857142857142857) internal successors, (82), 15 states have internal predecessors, (82), 4 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (62), 2 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-28 23:49:24,001 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 888 transitions. [2023-11-28 23:49:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-28 23:49:24,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:49:24,003 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:49:24,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-28 23:49:24,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 23:49:24,203 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:49:24,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:49:24,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1011163784, now seen corresponding path program 1 times [2023-11-28 23:49:24,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:49:24,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780695284] [2023-11-28 23:49:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:24,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:49:24,222 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:49:24,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935566564] [2023-11-28 23:49:24,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:24,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:49:24,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:49:24,223 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:49:24,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 23:49:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:49:24,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-28 23:49:24,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:49:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-28 23:49:45,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:49:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-28 23:49:53,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:49:53,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780695284] [2023-11-28 23:49:53,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:49:53,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935566564] [2023-11-28 23:49:53,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935566564] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 23:49:53,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 23:49:53,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-28 23:49:53,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163078246] [2023-11-28 23:49:53,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:49:53,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 23:49:53,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:49:53,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 23:49:53,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2023-11-28 23:49:53,874 INFO L87 Difference]: Start difference. First operand 663 states and 888 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:49:54,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:49:54,878 INFO L93 Difference]: Finished difference Result 1242 states and 1662 transitions. [2023-11-28 23:49:54,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 23:49:54,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 203 [2023-11-28 23:49:54,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:49:54,882 INFO L225 Difference]: With dead ends: 1242 [2023-11-28 23:49:54,882 INFO L226 Difference]: Without dead ends: 751 [2023-11-28 23:49:54,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2023-11-28 23:49:54,884 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 671 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 23:49:54,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 333 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 23:49:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-11-28 23:49:55,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 641. [2023-11-28 23:49:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 510 states have (on average 1.2843137254901962) internal successors, (655), 515 states have internal predecessors, (655), 101 states have call successors, (101), 29 states have call predecessors, (101), 29 states have return successors, (101), 96 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-28 23:49:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 857 transitions. [2023-11-28 23:49:55,025 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 857 transitions. Word has length 203 [2023-11-28 23:49:55,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:49:55,025 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 857 transitions. [2023-11-28 23:49:55,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:49:55,026 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 857 transitions. [2023-11-28 23:49:55,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-28 23:49:55,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:49:55,027 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:49:55,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-28 23:49:55,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:49:55,228 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:49:55,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:49:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1645158298, now seen corresponding path program 1 times [2023-11-28 23:49:55,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:49:55,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085341458] [2023-11-28 23:49:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:55,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:49:55,251 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:49:55,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848469834] [2023-11-28 23:49:55,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:55,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:49:55,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:49:55,252 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:49:55,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-28 23:49:55,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:49:55,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 23:49:55,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:49:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 1012 proven. 108 refuted. 0 times theorem prover too weak. 740 trivial. 0 not checked. [2023-11-28 23:49:55,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:49:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 66 proven. 111 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2023-11-28 23:49:56,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:49:56,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085341458] [2023-11-28 23:49:56,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:49:56,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848469834] [2023-11-28 23:49:56,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848469834] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:49:56,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:49:56,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-28 23:49:56,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168140010] [2023-11-28 23:49:56,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:49:56,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 23:49:56,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:49:56,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 23:49:56,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-11-28 23:49:56,026 INFO L87 Difference]: Start difference. First operand 641 states and 857 transitions. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 5 states have call successors, (51), 3 states have call predecessors, (51), 7 states have return successors, (52), 5 states have call predecessors, (52), 5 states have call successors, (52) [2023-11-28 23:49:56,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:49:56,388 INFO L93 Difference]: Finished difference Result 1150 states and 1517 transitions. [2023-11-28 23:49:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 23:49:56,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 5 states have call successors, (51), 3 states have call predecessors, (51), 7 states have return successors, (52), 5 states have call predecessors, (52), 5 states have call successors, (52) Word has length 203 [2023-11-28 23:49:56,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:49:56,391 INFO L225 Difference]: With dead ends: 1150 [2023-11-28 23:49:56,391 INFO L226 Difference]: Without dead ends: 656 [2023-11-28 23:49:56,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2023-11-28 23:49:56,392 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 204 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:49:56,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 274 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 23:49:56,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2023-11-28 23:49:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 408. [2023-11-28 23:49:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 322 states have (on average 1.2608695652173914) internal successors, (406), 323 states have internal predecessors, (406), 68 states have call successors, (68), 17 states have call predecessors, (68), 17 states have return successors, (68), 67 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-28 23:49:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 542 transitions. [2023-11-28 23:49:56,489 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 542 transitions. Word has length 203 [2023-11-28 23:49:56,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:49:56,489 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 542 transitions. [2023-11-28 23:49:56,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 5 states have call successors, (51), 3 states have call predecessors, (51), 7 states have return successors, (52), 5 states have call predecessors, (52), 5 states have call successors, (52) [2023-11-28 23:49:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 542 transitions. [2023-11-28 23:49:56,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-28 23:49:56,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:49:56,491 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:49:56,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-28 23:49:56,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 23:49:56,692 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:49:56,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:49:56,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2042901820, now seen corresponding path program 1 times [2023-11-28 23:49:56,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:49:56,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374985510] [2023-11-28 23:49:56,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:56,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:49:56,716 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:49:56,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633185398] [2023-11-28 23:49:56,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:49:56,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:49:56,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:49:56,720 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:49:56,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-28 23:49:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:49:56,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-28 23:49:56,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:50:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-28 23:50:07,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:50:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-28 23:50:14,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:50:14,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374985510] [2023-11-28 23:50:14,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:50:14,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633185398] [2023-11-28 23:50:14,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633185398] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 23:50:14,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 23:50:14,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-28 23:50:14,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854170170] [2023-11-28 23:50:14,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:50:14,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 23:50:14,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:50:14,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 23:50:14,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-28 23:50:14,028 INFO L87 Difference]: Start difference. First operand 408 states and 542 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:50:15,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:50:15,652 INFO L93 Difference]: Finished difference Result 840 states and 1116 transitions. [2023-11-28 23:50:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 23:50:15,653 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 203 [2023-11-28 23:50:15,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:50:15,656 INFO L225 Difference]: With dead ends: 840 [2023-11-28 23:50:15,656 INFO L226 Difference]: Without dead ends: 523 [2023-11-28 23:50:15,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2023-11-28 23:50:15,658 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 278 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 23:50:15,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 716 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 23:50:15,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-11-28 23:50:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 414. [2023-11-28 23:50:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 328 states have (on average 1.2591463414634145) internal successors, (413), 329 states have internal predecessors, (413), 68 states have call successors, (68), 17 states have call predecessors, (68), 17 states have return successors, (68), 67 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-28 23:50:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 549 transitions. [2023-11-28 23:50:15,746 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 549 transitions. Word has length 203 [2023-11-28 23:50:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:50:15,746 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 549 transitions. [2023-11-28 23:50:15,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:50:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 549 transitions. [2023-11-28 23:50:15,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-28 23:50:15,747 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:50:15,748 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:50:15,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-28 23:50:15,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:50:15,948 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:50:15,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:50:15,949 INFO L85 PathProgramCache]: Analyzing trace with hash 446627142, now seen corresponding path program 1 times [2023-11-28 23:50:15,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:50:15,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875503817] [2023-11-28 23:50:15,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:50:15,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:50:15,970 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:50:15,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695389554] [2023-11-28 23:50:15,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:50:15,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:50:15,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:50:15,971 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:50:15,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-28 23:50:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:50:16,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-28 23:50:16,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:50:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-28 23:50:26,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:50:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-28 23:50:32,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:50:32,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875503817] [2023-11-28 23:50:32,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:50:32,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695389554] [2023-11-28 23:50:32,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695389554] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 23:50:32,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 23:50:32,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-28 23:50:32,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478718075] [2023-11-28 23:50:32,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:50:32,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 23:50:32,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:50:32,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 23:50:32,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-28 23:50:32,564 INFO L87 Difference]: Start difference. First operand 414 states and 549 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:50:34,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:50:34,268 INFO L93 Difference]: Finished difference Result 846 states and 1122 transitions. [2023-11-28 23:50:34,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 23:50:34,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 203 [2023-11-28 23:50:34,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:50:34,271 INFO L225 Difference]: With dead ends: 846 [2023-11-28 23:50:34,271 INFO L226 Difference]: Without dead ends: 523 [2023-11-28 23:50:34,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2023-11-28 23:50:34,273 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 236 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 23:50:34,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 736 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 23:50:34,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-11-28 23:50:34,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 420. [2023-11-28 23:50:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 334 states have (on average 1.2574850299401197) internal successors, (420), 335 states have internal predecessors, (420), 68 states have call successors, (68), 17 states have call predecessors, (68), 17 states have return successors, (68), 67 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-28 23:50:34,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 556 transitions. [2023-11-28 23:50:34,328 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 556 transitions. Word has length 203 [2023-11-28 23:50:34,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:50:34,328 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 556 transitions. [2023-11-28 23:50:34,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:50:34,328 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 556 transitions. [2023-11-28 23:50:34,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-28 23:50:34,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:50:34,329 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:50:34,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-28 23:50:34,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:50:34,530 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:50:34,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:50:34,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2020749597, now seen corresponding path program 1 times [2023-11-28 23:50:34,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:50:34,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106902047] [2023-11-28 23:50:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:50:34,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:50:34,550 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:50:34,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602811956] [2023-11-28 23:50:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:50:34,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:50:34,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:50:34,552 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:50:34,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-28 23:50:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:50:34,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-28 23:50:34,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:51:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 888 proven. 486 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2023-11-28 23:51:16,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:51:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-28 23:51:26,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:26,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106902047] [2023-11-28 23:51:26,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:51:26,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602811956] [2023-11-28 23:51:26,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602811956] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 23:51:26,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 23:51:26,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [41] total 49 [2023-11-28 23:51:26,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049652858] [2023-11-28 23:51:26,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:26,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 23:51:26,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:26,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 23:51:26,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=1860, Unknown=0, NotChecked=0, Total=2352 [2023-11-28 23:51:26,885 INFO L87 Difference]: Start difference. First operand 420 states and 556 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:51:28,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:51:28,041 INFO L93 Difference]: Finished difference Result 854 states and 1134 transitions. [2023-11-28 23:51:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 23:51:28,042 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 204 [2023-11-28 23:51:28,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:51:28,044 INFO L225 Difference]: With dead ends: 854 [2023-11-28 23:51:28,044 INFO L226 Difference]: Without dead ends: 525 [2023-11-28 23:51:28,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=532, Invalid=2224, Unknown=0, NotChecked=0, Total=2756 [2023-11-28 23:51:28,046 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 383 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 23:51:28,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 342 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 23:51:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2023-11-28 23:51:28,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 417. [2023-11-28 23:51:28,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 331 states have (on average 1.2598187311178248) internal successors, (417), 332 states have internal predecessors, (417), 68 states have call successors, (68), 17 states have call predecessors, (68), 17 states have return successors, (68), 67 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-28 23:51:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 553 transitions. [2023-11-28 23:51:28,102 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 553 transitions. Word has length 204 [2023-11-28 23:51:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:51:28,102 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 553 transitions. [2023-11-28 23:51:28,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:51:28,103 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 553 transitions. [2023-11-28 23:51:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-28 23:51:28,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:51:28,104 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:28,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-28 23:51:28,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:51:28,304 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:51:28,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:28,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1251701161, now seen corresponding path program 1 times [2023-11-28 23:51:28,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:28,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106750693] [2023-11-28 23:51:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:28,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:28,324 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:51:28,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177876987] [2023-11-28 23:51:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:28,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:51:28,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:51:28,325 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:51:28,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-28 23:51:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:28,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 23:51:28,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:54:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-28 23:54:33,769 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:54:33,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:54:33,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106750693] [2023-11-28 23:54:33,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 23:54:33,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177876987] [2023-11-28 23:54:33,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177876987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:54:33,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:54:33,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 23:54:33,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555709607] [2023-11-28 23:54:33,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:54:33,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:54:33,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:54:33,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:54:33,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:54:33,771 INFO L87 Difference]: Start difference. First operand 417 states and 553 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:54:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:54:34,178 INFO L93 Difference]: Finished difference Result 539 states and 710 transitions. [2023-11-28 23:54:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 23:54:34,179 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 204 [2023-11-28 23:54:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:54:34,181 INFO L225 Difference]: With dead ends: 539 [2023-11-28 23:54:34,181 INFO L226 Difference]: Without dead ends: 537 [2023-11-28 23:54:34,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-28 23:54:34,182 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 146 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:54:34,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 487 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:54:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2023-11-28 23:54:34,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 427. [2023-11-28 23:54:34,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 340 states have (on average 1.2529411764705882) internal successors, (426), 341 states have internal predecessors, (426), 68 states have call successors, (68), 18 states have call predecessors, (68), 18 states have return successors, (68), 67 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-28 23:54:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 562 transitions. [2023-11-28 23:54:34,255 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 562 transitions. Word has length 204 [2023-11-28 23:54:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:54:34,255 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 562 transitions. [2023-11-28 23:54:34,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-28 23:54:34,255 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 562 transitions. [2023-11-28 23:54:34,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-28 23:54:34,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:54:34,257 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:54:34,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-28 23:54:34,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:54:34,458 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:54:34,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:54:34,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1612388128, now seen corresponding path program 1 times [2023-11-28 23:54:34,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:54:34,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88040881] [2023-11-28 23:54:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:54:34,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:54:34,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 23:54:34,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375986302] [2023-11-28 23:54:34,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:54:34,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:54:34,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:54:34,493 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:54:34,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63157bb0-91f9-4360-89f5-ffce091cadf1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-28 23:54:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:54:34,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 23:54:34,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 750 proven. 66 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2023-11-28 23:56:13,052 INFO L327 TraceCheckSpWp]: Computing backward predicates...