./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-18.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-18.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ --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 44903c27af28474fa8f64f9be68c4119ba3454622360f31f5c3d951f7d2ecb67 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:35:28,976 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:35:29,115 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 21:35:29,120 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:35:29,120 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:35:29,159 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:35:29,160 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:35:29,160 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:35:29,161 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 21:35:29,162 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 21:35:29,163 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:35:29,163 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:35:29,164 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:35:29,165 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:35:29,165 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 21:35:29,166 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:35:29,167 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:35:29,167 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:35:29,168 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:35:29,169 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:35:29,169 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:35:29,170 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:35:29,170 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:35:29,171 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:35:29,172 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:35:29,172 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:35:29,173 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:35:29,173 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:35:29,174 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:35:29,175 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:35:29,175 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:35:29,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:35:29,176 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:35:29,177 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:35:29,177 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:35:29,178 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 21:35:29,179 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:35:29,179 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:35:29,180 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 21:35:29,180 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:35:29,181 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 21:35:29,181 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:35:29,182 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_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44903c27af28474fa8f64f9be68c4119ba3454622360f31f5c3d951f7d2ecb67 [2023-11-23 21:35:29,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:35:29,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:35:29,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:35:29,544 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:35:29,545 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:35:29,546 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-18.i [2023-11-23 21:35:32,851 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:35:33,179 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:35:33,180 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-18.i [2023-11-23 21:35:33,197 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/data/349092645/c17e55f328ed4ba5a39ca676389f1faa/FLAGd5445a475 [2023-11-23 21:35:33,217 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/data/349092645/c17e55f328ed4ba5a39ca676389f1faa [2023-11-23 21:35:33,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:35:33,223 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:35:33,224 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:35:33,225 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:35:33,232 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:35:33,233 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:35:33" (1/1) ... [2023-11-23 21:35:33,234 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a78996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:33, skipping insertion in model container [2023-11-23 21:35:33,235 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:35:33" (1/1) ... [2023-11-23 21:35:33,298 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:35:33,558 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_ddc7326b-5144-4e04-a1c2-57975fc84f70/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-18.i[916,929] [2023-11-23 21:35:33,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:35:33,825 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:35:33,839 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_ddc7326b-5144-4e04-a1c2-57975fc84f70/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-18.i[916,929] [2023-11-23 21:35:33,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:35:33,933 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:35:33,933 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:33 WrapperNode [2023-11-23 21:35:33,934 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:35:33,935 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:35:33,935 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:35:33,935 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:35:33,944 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:33" (1/1) ... [2023-11-23 21:35:33,988 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:33" (1/1) ... [2023-11-23 21:35:34,136 INFO L138 Inliner]: procedures = 26, calls = 95, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 578 [2023-11-23 21:35:34,137 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:35:34,138 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:35:34,138 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:35:34,138 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:35:34,167 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:33" (1/1) ... [2023-11-23 21:35:34,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:33" (1/1) ... [2023-11-23 21:35:34,180 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:33" (1/1) ... [2023-11-23 21:35:34,215 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 21:35:34,231 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:33" (1/1) ... [2023-11-23 21:35:34,232 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:33" (1/1) ... [2023-11-23 21:35:34,266 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:33" (1/1) ... [2023-11-23 21:35:34,292 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:33" (1/1) ... [2023-11-23 21:35:34,312 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:33" (1/1) ... [2023-11-23 21:35:34,318 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:33" (1/1) ... [2023-11-23 21:35:34,337 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:35:34,339 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:35:34,341 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:35:34,341 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:35:34,342 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:33" (1/1) ... [2023-11-23 21:35:34,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:35:34,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:34,380 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:35:34,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:35:34,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:35:34,434 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:35:34,435 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:35:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 21:35:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:35:34,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:35:34,633 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:35:34,636 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:35:35,562 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:35:35,660 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:35:35,664 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:35:35,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:35:35 BoogieIcfgContainer [2023-11-23 21:35:35,665 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:35:35,668 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:35:35,668 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:35:35,672 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:35:35,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:35:33" (1/3) ... [2023-11-23 21:35:35,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@249b43db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:35:35, skipping insertion in model container [2023-11-23 21:35:35,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:33" (2/3) ... [2023-11-23 21:35:35,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@249b43db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:35:35, skipping insertion in model container [2023-11-23 21:35:35,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:35:35" (3/3) ... [2023-11-23 21:35:35,679 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-18.i [2023-11-23 21:35:35,698 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:35:35,698 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:35:35,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:35:35,768 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;@4d47b3a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:35:35,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:35:35,775 INFO L276 IsEmpty]: Start isEmpty. Operand has 227 states, 142 states have (on average 1.5704225352112675) internal successors, (223), 143 states have internal predecessors, (223), 82 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2023-11-23 21:35:35,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-23 21:35:35,822 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:35,824 INFO L195 NwaCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:35,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:35:35,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:35,832 INFO L85 PathProgramCache]: Analyzing trace with hash -236378922, now seen corresponding path program 1 times [2023-11-23 21:35:35,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:35,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530863625] [2023-11-23 21:35:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:35,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:36,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:36,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530863625] [2023-11-23 21:35:36,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 21:35:36,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478117507] [2023-11-23 21:35:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:36,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:36,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:36,269 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:36,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:35:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:36,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 21:35:36,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 13122 trivial. 0 not checked. [2023-11-23 21:35:36,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:36,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478117507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:36,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:36,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:35:36,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818246639] [2023-11-23 21:35:36,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:36,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:35:36,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:37,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:35:37,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:35:37,008 INFO L87 Difference]: Start difference. First operand has 227 states, 142 states have (on average 1.5704225352112675) internal successors, (223), 143 states have internal predecessors, (223), 82 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) Second operand has 2 states, 2 states have (on average 54.5) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (82), 2 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 2 states have call successors, (82) [2023-11-23 21:35:37,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:37,119 INFO L93 Difference]: Finished difference Result 451 states and 854 transitions. [2023-11-23 21:35:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:35:37,122 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 54.5) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (82), 2 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 2 states have call successors, (82) Word has length 514 [2023-11-23 21:35:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:37,140 INFO L225 Difference]: With dead ends: 451 [2023-11-23 21:35:37,140 INFO L226 Difference]: Without dead ends: 225 [2023-11-23 21:35:37,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:35:37,153 INFO L413 NwaCegarLoop]: 377 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, 377 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 [2023-11-23 21:35:37,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 377 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:35:37,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-23 21:35:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2023-11-23 21:35:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 141 states have (on average 1.5319148936170213) internal successors, (216), 141 states have internal predecessors, (216), 82 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2023-11-23 21:35:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 380 transitions. [2023-11-23 21:35:37,282 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 380 transitions. Word has length 514 [2023-11-23 21:35:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:37,283 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 380 transitions. [2023-11-23 21:35:37,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 54.5) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (82), 2 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 2 states have call successors, (82) [2023-11-23 21:35:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 380 transitions. [2023-11-23 21:35:37,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-23 21:35:37,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:37,303 INFO L195 NwaCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:37,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:37,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:37,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:35:37,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:37,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2099031318, now seen corresponding path program 1 times [2023-11-23 21:35:37,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:37,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631239970] [2023-11-23 21:35:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:37,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:37,756 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:37,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039589966] [2023-11-23 21:35:37,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:37,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:37,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:37,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:37,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:35:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:38,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:35:38,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13284 trivial. 0 not checked. [2023-11-23 21:35:38,259 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:38,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:38,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631239970] [2023-11-23 21:35:38,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:38,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039589966] [2023-11-23 21:35:38,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039589966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:38,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:38,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:35:38,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788994367] [2023-11-23 21:35:38,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:38,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:35:38,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:38,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:35:38,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:35:38,267 INFO L87 Difference]: Start difference. First operand 225 states and 380 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:35:38,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:38,366 INFO L93 Difference]: Finished difference Result 673 states and 1138 transitions. [2023-11-23 21:35:38,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:35:38,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) Word has length 514 [2023-11-23 21:35:38,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:38,377 INFO L225 Difference]: With dead ends: 673 [2023-11-23 21:35:38,378 INFO L226 Difference]: Without dead ends: 449 [2023-11-23 21:35:38,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:35:38,381 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 376 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:38,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 1036 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:35:38,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-11-23 21:35:38,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 226. [2023-11-23 21:35:38,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 142 states have (on average 1.528169014084507) internal successors, (217), 142 states have internal predecessors, (217), 82 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2023-11-23 21:35:38,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 381 transitions. [2023-11-23 21:35:38,469 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 381 transitions. Word has length 514 [2023-11-23 21:35:38,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:38,477 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 381 transitions. [2023-11-23 21:35:38,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:35:38,478 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 381 transitions. [2023-11-23 21:35:38,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-23 21:35:38,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:38,496 INFO L195 NwaCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:38,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:38,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:38,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:35:38,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:38,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2121663572, now seen corresponding path program 1 times [2023-11-23 21:35:38,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:38,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430252624] [2023-11-23 21:35:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:38,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:38,827 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:38,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352791354] [2023-11-23 21:35:38,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:38,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:38,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:38,830 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:38,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:35:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:39,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:35:39,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13284 trivial. 0 not checked. [2023-11-23 21:35:39,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:39,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:39,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430252624] [2023-11-23 21:35:39,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:39,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352791354] [2023-11-23 21:35:39,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352791354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:39,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:39,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:35:39,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85071506] [2023-11-23 21:35:39,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:39,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:35:39,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:39,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:35:39,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:35:39,325 INFO L87 Difference]: Start difference. First operand 226 states and 381 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:35:39,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:39,474 INFO L93 Difference]: Finished difference Result 675 states and 1139 transitions. [2023-11-23 21:35:39,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:35:39,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) Word has length 514 [2023-11-23 21:35:39,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:39,492 INFO L225 Difference]: With dead ends: 675 [2023-11-23 21:35:39,492 INFO L226 Difference]: Without dead ends: 450 [2023-11-23 21:35:39,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:35:39,498 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 364 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:39,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 736 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:35:39,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2023-11-23 21:35:39,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2023-11-23 21:35:39,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 281 states have (on average 1.5124555160142348) internal successors, (425), 281 states have internal predecessors, (425), 164 states have call successors, (164), 2 states have call predecessors, (164), 2 states have return successors, (164), 164 states have call predecessors, (164), 164 states have call successors, (164) [2023-11-23 21:35:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 753 transitions. [2023-11-23 21:35:39,581 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 753 transitions. Word has length 514 [2023-11-23 21:35:39,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:39,583 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 753 transitions. [2023-11-23 21:35:39,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:35:39,584 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 753 transitions. [2023-11-23 21:35:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-23 21:35:39,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:39,590 INFO L195 NwaCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:39,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:39,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:39,804 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:35:39,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:39,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1735286232, now seen corresponding path program 1 times [2023-11-23 21:35:39,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:39,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215984667] [2023-11-23 21:35:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:39,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:40,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:40,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128198746] [2023-11-23 21:35:40,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:40,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:40,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:40,052 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:40,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:35:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:40,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:35:40,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13284 trivial. 0 not checked. [2023-11-23 21:35:40,596 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:40,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:40,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215984667] [2023-11-23 21:35:40,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:40,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128198746] [2023-11-23 21:35:40,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128198746] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:40,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:40,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:35:40,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905156908] [2023-11-23 21:35:40,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:40,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:35:40,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:40,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:35:40,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:35:40,603 INFO L87 Difference]: Start difference. First operand 448 states and 753 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:35:40,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:40,708 INFO L93 Difference]: Finished difference Result 1125 states and 1898 transitions. [2023-11-23 21:35:40,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:35:40,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) Word has length 514 [2023-11-23 21:35:40,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:40,719 INFO L225 Difference]: With dead ends: 1125 [2023-11-23 21:35:40,719 INFO L226 Difference]: Without dead ends: 678 [2023-11-23 21:35:40,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:35:40,731 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 172 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:40,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 736 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:35:40,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2023-11-23 21:35:40,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 674. [2023-11-23 21:35:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 471 states have (on average 1.5774946921443738) internal successors, (743), 473 states have internal predecessors, (743), 198 states have call successors, (198), 4 states have call predecessors, (198), 4 states have return successors, (198), 196 states have call predecessors, (198), 198 states have call successors, (198) [2023-11-23 21:35:40,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1139 transitions. [2023-11-23 21:35:40,824 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1139 transitions. Word has length 514 [2023-11-23 21:35:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:40,826 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 1139 transitions. [2023-11-23 21:35:40,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:35:40,827 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1139 transitions. [2023-11-23 21:35:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-23 21:35:40,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:40,834 INFO L195 NwaCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:40,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:41,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-23 21:35:41,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:35:41,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:41,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1875834842, now seen corresponding path program 1 times [2023-11-23 21:35:41,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:41,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492982713] [2023-11-23 21:35:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:41,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:41,135 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:41,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248373358] [2023-11-23 21:35:41,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:41,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:41,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:41,137 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:41,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:35:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:41,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:35:41,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13284 trivial. 0 not checked. [2023-11-23 21:35:42,656 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:42,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:42,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492982713] [2023-11-23 21:35:42,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:42,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248373358] [2023-11-23 21:35:42,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248373358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:42,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:42,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:35:42,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014976476] [2023-11-23 21:35:42,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:42,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:35:42,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:42,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:35:42,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:35:42,667 INFO L87 Difference]: Start difference. First operand 674 states and 1139 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:35:44,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:44,572 INFO L93 Difference]: Finished difference Result 5339 states and 9025 transitions. [2023-11-23 21:35:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:35:44,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) Word has length 514 [2023-11-23 21:35:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:44,628 INFO L225 Difference]: With dead ends: 5339 [2023-11-23 21:35:44,629 INFO L226 Difference]: Without dead ends: 4666 [2023-11-23 21:35:44,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:35:44,636 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 1644 mSDsluCounter, 2486 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 3206 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:44,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1644 Valid, 3206 Invalid, 832 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [670 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 21:35:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2023-11-23 21:35:45,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4654. [2023-11-23 21:35:45,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4654 states, 3239 states have (on average 1.5538746526705773) internal successors, (5033), 3253 states have internal predecessors, (5033), 1386 states have call successors, (1386), 28 states have call predecessors, (1386), 28 states have return successors, (1386), 1372 states have call predecessors, (1386), 1386 states have call successors, (1386) [2023-11-23 21:35:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4654 states to 4654 states and 7805 transitions. [2023-11-23 21:35:45,561 INFO L78 Accepts]: Start accepts. Automaton has 4654 states and 7805 transitions. Word has length 514 [2023-11-23 21:35:45,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:45,564 INFO L495 AbstractCegarLoop]: Abstraction has 4654 states and 7805 transitions. [2023-11-23 21:35:45,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:35:45,564 INFO L276 IsEmpty]: Start isEmpty. Operand 4654 states and 7805 transitions. [2023-11-23 21:35:45,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-23 21:35:45,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:45,573 INFO L195 NwaCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:45,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:45,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:45,800 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:35:45,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:45,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1860316124, now seen corresponding path program 1 times [2023-11-23 21:35:45,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:45,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067233285] [2023-11-23 21:35:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:45,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:45,876 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:45,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419831558] [2023-11-23 21:35:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:45,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:45,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:45,878 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:45,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:35:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:46,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 1146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:35:46,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13284 trivial. 0 not checked. [2023-11-23 21:35:46,328 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:46,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:46,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067233285] [2023-11-23 21:35:46,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:46,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419831558] [2023-11-23 21:35:46,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419831558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:46,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:46,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:35:46,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368234448] [2023-11-23 21:35:46,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:46,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:35:46,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:46,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:35:46,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:35:46,333 INFO L87 Difference]: Start difference. First operand 4654 states and 7805 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:35:46,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:46,690 INFO L93 Difference]: Finished difference Result 8753 states and 14604 transitions. [2023-11-23 21:35:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:35:46,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) Word has length 514 [2023-11-23 21:35:46,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:46,723 INFO L225 Difference]: With dead ends: 8753 [2023-11-23 21:35:46,723 INFO L226 Difference]: Without dead ends: 4100 [2023-11-23 21:35:46,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:35:46,740 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 193 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:46,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 830 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:35:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2023-11-23 21:35:47,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 3488. [2023-11-23 21:35:47,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3488 states, 2311 states have (on average 1.5097360450021635) internal successors, (3489), 2311 states have internal predecessors, (3489), 1148 states have call successors, (1148), 28 states have call predecessors, (1148), 28 states have return successors, (1148), 1148 states have call predecessors, (1148), 1148 states have call successors, (1148) [2023-11-23 21:35:47,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3488 states to 3488 states and 5785 transitions. [2023-11-23 21:35:47,335 INFO L78 Accepts]: Start accepts. Automaton has 3488 states and 5785 transitions. Word has length 514 [2023-11-23 21:35:47,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:47,337 INFO L495 AbstractCegarLoop]: Abstraction has 3488 states and 5785 transitions. [2023-11-23 21:35:47,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:35:47,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3488 states and 5785 transitions. [2023-11-23 21:35:47,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-23 21:35:47,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:47,345 INFO L195 NwaCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:47,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:47,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:47,572 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:35:47,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:47,573 INFO L85 PathProgramCache]: Analyzing trace with hash -646927080, now seen corresponding path program 1 times [2023-11-23 21:35:47,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:47,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104757508] [2023-11-23 21:35:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:47,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:47,655 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:47,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851340802] [2023-11-23 21:35:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:47,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:47,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:47,657 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:47,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:35:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:48,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 1148 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:35:48,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13284 trivial. 0 not checked. [2023-11-23 21:35:50,359 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:50,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:50,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104757508] [2023-11-23 21:35:50,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:50,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851340802] [2023-11-23 21:35:50,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851340802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:50,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:50,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:35:50,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786775181] [2023-11-23 21:35:50,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:50,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:35:50,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:50,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:35:50,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:35:50,369 INFO L87 Difference]: Start difference. First operand 3488 states and 5785 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:35:51,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:51,097 INFO L93 Difference]: Finished difference Result 7426 states and 12315 transitions. [2023-11-23 21:35:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:35:51,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) Word has length 514 [2023-11-23 21:35:51,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:51,138 INFO L225 Difference]: With dead ends: 7426 [2023-11-23 21:35:51,139 INFO L226 Difference]: Without dead ends: 3939 [2023-11-23 21:35:51,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:35:51,161 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 136 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:51,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1012 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:35:51,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2023-11-23 21:35:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 3937. [2023-11-23 21:35:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3937 states, 2592 states have (on average 1.5007716049382716) internal successors, (3890), 2592 states have internal predecessors, (3890), 1312 states have call successors, (1312), 32 states have call predecessors, (1312), 32 states have return successors, (1312), 1312 states have call predecessors, (1312), 1312 states have call successors, (1312) [2023-11-23 21:35:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3937 states to 3937 states and 6514 transitions. [2023-11-23 21:35:51,850 INFO L78 Accepts]: Start accepts. Automaton has 3937 states and 6514 transitions. Word has length 514 [2023-11-23 21:35:51,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:51,852 INFO L495 AbstractCegarLoop]: Abstraction has 3937 states and 6514 transitions. [2023-11-23 21:35:51,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:35:51,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3937 states and 6514 transitions. [2023-11-23 21:35:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-23 21:35:51,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:51,859 INFO L195 NwaCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:51,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:52,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:52,088 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:35:52,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:52,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1490932582, now seen corresponding path program 1 times [2023-11-23 21:35:52,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:52,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751331369] [2023-11-23 21:35:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:52,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:52,159 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:52,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832914702] [2023-11-23 21:35:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:52,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:52,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:52,166 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:52,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:35:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:52,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 1145 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:35:52,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13284 trivial. 0 not checked. [2023-11-23 21:35:53,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:53,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:53,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751331369] [2023-11-23 21:35:53,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:53,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832914702] [2023-11-23 21:35:53,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832914702] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:53,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:53,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:35:53,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024818407] [2023-11-23 21:35:53,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:53,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:35:53,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:53,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:35:53,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:35:53,323 INFO L87 Difference]: Start difference. First operand 3937 states and 6514 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:35:54,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:54,341 INFO L93 Difference]: Finished difference Result 10865 states and 17979 transitions. [2023-11-23 21:35:54,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:35:54,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) Word has length 514 [2023-11-23 21:35:54,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:54,423 INFO L225 Difference]: With dead ends: 10865 [2023-11-23 21:35:54,423 INFO L226 Difference]: Without dead ends: 6929 [2023-11-23 21:35:54,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:35:54,444 INFO L413 NwaCegarLoop]: 802 mSDtfsCounter, 735 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 1993 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:54,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 1993 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:35:54,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6929 states. [2023-11-23 21:35:55,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6929 to 4835. [2023-11-23 21:35:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4835 states, 3154 states have (on average 1.4901712111604313) internal successors, (4700), 3154 states have internal predecessors, (4700), 1640 states have call successors, (1640), 40 states have call predecessors, (1640), 40 states have return successors, (1640), 1640 states have call predecessors, (1640), 1640 states have call successors, (1640) [2023-11-23 21:35:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 7980 transitions. [2023-11-23 21:35:55,517 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 7980 transitions. Word has length 514 [2023-11-23 21:35:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:55,518 INFO L495 AbstractCegarLoop]: Abstraction has 4835 states and 7980 transitions. [2023-11-23 21:35:55,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:35:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 7980 transitions. [2023-11-23 21:35:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-23 21:35:55,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:55,525 INFO L195 NwaCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:55,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:55,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:55,749 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:35:55,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:55,749 INFO L85 PathProgramCache]: Analyzing trace with hash -390546344, now seen corresponding path program 1 times [2023-11-23 21:35:55,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:55,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527932487] [2023-11-23 21:35:55,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:55,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:55,832 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:55,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655311706] [2023-11-23 21:35:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:55,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:55,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:55,834 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:55,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:35:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:56,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:35:56,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:56,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13284 trivial. 0 not checked. [2023-11-23 21:35:56,389 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:56,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:56,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527932487] [2023-11-23 21:35:56,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:56,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655311706] [2023-11-23 21:35:56,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655311706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:56,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:56,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:35:56,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861295955] [2023-11-23 21:35:56,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:56,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:35:56,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:56,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:35:56,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:35:56,397 INFO L87 Difference]: Start difference. First operand 4835 states and 7980 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:35:56,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:56,936 INFO L93 Difference]: Finished difference Result 12409 states and 20442 transitions. [2023-11-23 21:35:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:35:56,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) Word has length 514 [2023-11-23 21:35:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:56,980 INFO L225 Difference]: With dead ends: 12409 [2023-11-23 21:35:56,981 INFO L226 Difference]: Without dead ends: 7575 [2023-11-23 21:35:57,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:35:57,005 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 209 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:57,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 863 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:35:57,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7575 states. [2023-11-23 21:35:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7575 to 7553. [2023-11-23 21:35:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7553 states, 5332 states have (on average 1.5225056264066017) internal successors, (8118), 5352 states have internal predecessors, (8118), 2140 states have call successors, (2140), 80 states have call predecessors, (2140), 80 states have return successors, (2140), 2120 states have call predecessors, (2140), 2140 states have call successors, (2140) [2023-11-23 21:35:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7553 states to 7553 states and 12398 transitions. [2023-11-23 21:35:58,130 INFO L78 Accepts]: Start accepts. Automaton has 7553 states and 12398 transitions. Word has length 514 [2023-11-23 21:35:58,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:58,131 INFO L495 AbstractCegarLoop]: Abstraction has 7553 states and 12398 transitions. [2023-11-23 21:35:58,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:35:58,132 INFO L276 IsEmpty]: Start isEmpty. Operand 7553 states and 12398 transitions. [2023-11-23 21:35:58,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-11-23 21:35:58,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:58,144 INFO L195 NwaCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:58,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:58,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:58,360 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:35:58,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:58,361 INFO L85 PathProgramCache]: Analyzing trace with hash 471077767, now seen corresponding path program 1 times [2023-11-23 21:35:58,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:58,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251644075] [2023-11-23 21:35:58,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:58,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:58,447 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:58,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427377656] [2023-11-23 21:35:58,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:58,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:58,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:58,449 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:58,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:35:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:58,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:35:58,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13284 trivial. 0 not checked. [2023-11-23 21:35:59,689 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:59,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:59,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251644075] [2023-11-23 21:35:59,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:59,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427377656] [2023-11-23 21:35:59,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427377656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:59,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:59,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:35:59,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078490508] [2023-11-23 21:35:59,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:59,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:35:59,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:59,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:35:59,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:35:59,695 INFO L87 Difference]: Start difference. First operand 7553 states and 12398 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:36:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:36:00,645 INFO L93 Difference]: Finished difference Result 22657 states and 37192 transitions. [2023-11-23 21:36:00,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:36:00,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) Word has length 515 [2023-11-23 21:36:00,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:36:00,708 INFO L225 Difference]: With dead ends: 22657 [2023-11-23 21:36:00,709 INFO L226 Difference]: Without dead ends: 15105 [2023-11-23 21:36:00,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:36:00,733 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 124 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:36:00,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 791 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:36:00,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15105 states. [2023-11-23 21:36:02,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15105 to 15103. [2023-11-23 21:36:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15103 states, 10662 states have (on average 1.5188519977490151) internal successors, (16194), 10702 states have internal predecessors, (16194), 4280 states have call successors, (4280), 160 states have call predecessors, (4280), 160 states have return successors, (4280), 4240 states have call predecessors, (4280), 4280 states have call successors, (4280) [2023-11-23 21:36:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15103 states to 15103 states and 24754 transitions. [2023-11-23 21:36:02,785 INFO L78 Accepts]: Start accepts. Automaton has 15103 states and 24754 transitions. Word has length 515 [2023-11-23 21:36:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:36:02,787 INFO L495 AbstractCegarLoop]: Abstraction has 15103 states and 24754 transitions. [2023-11-23 21:36:02,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 1 states have call successors, (82), 1 states have call predecessors, (82), 1 states have return successors, (82), 1 states have call predecessors, (82), 1 states have call successors, (82) [2023-11-23 21:36:02,787 INFO L276 IsEmpty]: Start isEmpty. Operand 15103 states and 24754 transitions. [2023-11-23 21:36:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-11-23 21:36:02,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:36:02,801 INFO L195 NwaCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:36:02,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:36:03,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:36:03,026 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:36:03,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:36:03,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1150045387, now seen corresponding path program 1 times [2023-11-23 21:36:03,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:36:03,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785300328] [2023-11-23 21:36:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:03,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:36:03,117 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:36:03,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841601377] [2023-11-23 21:36:03,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:03,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:36:03,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:36:03,119 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:36:03,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 21:36:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:36:03,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:36:03,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:36:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 3967 proven. 42 refuted. 0 times theorem prover too weak. 9275 trivial. 0 not checked. [2023-11-23 21:36:03,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:36:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 201 proven. 42 refuted. 0 times theorem prover too weak. 13041 trivial. 0 not checked. [2023-11-23 21:36:04,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:36:04,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785300328] [2023-11-23 21:36:04,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:36:04,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841601377] [2023-11-23 21:36:04,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841601377] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:36:04,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:36:04,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-23 21:36:04,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607675728] [2023-11-23 21:36:04,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:36:04,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:36:04,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:36:04,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:36:04,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:36:04,230 INFO L87 Difference]: Start difference. First operand 15103 states and 24754 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) [2023-11-23 21:36:05,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:36:05,990 INFO L93 Difference]: Finished difference Result 30765 states and 50027 transitions. [2023-11-23 21:36:05,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:36:05,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) Word has length 515 [2023-11-23 21:36:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:36:06,057 INFO L225 Difference]: With dead ends: 30765 [2023-11-23 21:36:06,057 INFO L226 Difference]: Without dead ends: 15663 [2023-11-23 21:36:06,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1032 GetRequests, 1022 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:36:06,094 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 240 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:36:06,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 707 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:36:06,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15663 states. [2023-11-23 21:36:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15663 to 15263. [2023-11-23 21:36:08,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15263 states, 10782 states have (on average 1.505657577443888) internal successors, (16234), 10822 states have internal predecessors, (16234), 4280 states have call successors, (4280), 200 states have call predecessors, (4280), 200 states have return successors, (4280), 4240 states have call predecessors, (4280), 4280 states have call successors, (4280) [2023-11-23 21:36:08,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15263 states to 15263 states and 24794 transitions. [2023-11-23 21:36:08,361 INFO L78 Accepts]: Start accepts. Automaton has 15263 states and 24794 transitions. Word has length 515 [2023-11-23 21:36:08,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:36:08,362 INFO L495 AbstractCegarLoop]: Abstraction has 15263 states and 24794 transitions. [2023-11-23 21:36:08,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) [2023-11-23 21:36:08,363 INFO L276 IsEmpty]: Start isEmpty. Operand 15263 states and 24794 transitions. [2023-11-23 21:36:08,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-11-23 21:36:08,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:36:08,373 INFO L195 NwaCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:36:08,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 21:36:08,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 21:36:08,588 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:36:08,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:36:08,589 INFO L85 PathProgramCache]: Analyzing trace with hash -538898355, now seen corresponding path program 1 times [2023-11-23 21:36:08,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:36:08,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483870582] [2023-11-23 21:36:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:08,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:36:08,661 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:36:08,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781687092] [2023-11-23 21:36:08,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:08,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:36:08,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:36:08,663 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:36:08,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 21:36:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:36:09,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:36:09,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:36:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 4371 proven. 48 refuted. 0 times theorem prover too weak. 8865 trivial. 0 not checked. [2023-11-23 21:36:09,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:36:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 195 proven. 48 refuted. 0 times theorem prover too weak. 13041 trivial. 0 not checked. [2023-11-23 21:36:09,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:36:09,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483870582] [2023-11-23 21:36:09,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:36:09,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781687092] [2023-11-23 21:36:09,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781687092] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:36:09,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:36:09,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-23 21:36:09,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491967131] [2023-11-23 21:36:09,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:36:09,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:36:09,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:36:09,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:36:09,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:36:09,723 INFO L87 Difference]: Start difference. First operand 15263 states and 24794 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (98), 2 states have call predecessors, (98), 4 states have return successors, (99), 2 states have call predecessors, (99), 2 states have call successors, (99) [2023-11-23 21:36:11,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:36:11,978 INFO L93 Difference]: Finished difference Result 31165 states and 50187 transitions. [2023-11-23 21:36:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:36:11,979 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (98), 2 states have call predecessors, (98), 4 states have return successors, (99), 2 states have call predecessors, (99), 2 states have call successors, (99) Word has length 515 [2023-11-23 21:36:11,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:36:12,053 INFO L225 Difference]: With dead ends: 31165 [2023-11-23 21:36:12,054 INFO L226 Difference]: Without dead ends: 15903 [2023-11-23 21:36:12,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1032 GetRequests, 1022 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:36:12,093 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 552 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:36:12,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 696 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:36:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15903 states. [2023-11-23 21:36:14,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15903 to 15423. [2023-11-23 21:36:14,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15423 states, 10902 states have (on average 1.4927536231884058) internal successors, (16274), 10942 states have internal predecessors, (16274), 4280 states have call successors, (4280), 240 states have call predecessors, (4280), 240 states have return successors, (4280), 4240 states have call predecessors, (4280), 4280 states have call successors, (4280) [2023-11-23 21:36:14,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15423 states to 15423 states and 24834 transitions. [2023-11-23 21:36:14,329 INFO L78 Accepts]: Start accepts. Automaton has 15423 states and 24834 transitions. Word has length 515 [2023-11-23 21:36:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:36:14,330 INFO L495 AbstractCegarLoop]: Abstraction has 15423 states and 24834 transitions. [2023-11-23 21:36:14,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (98), 2 states have call predecessors, (98), 4 states have return successors, (99), 2 states have call predecessors, (99), 2 states have call successors, (99) [2023-11-23 21:36:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 15423 states and 24834 transitions. [2023-11-23 21:36:14,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-11-23 21:36:14,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:36:14,341 INFO L195 NwaCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:36:14,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 21:36:14,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7326b-5144-4e04-a1c2-57975fc84f70/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 21:36:14,564 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:36:14,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:36:14,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1550015605, now seen corresponding path program 1 times [2023-11-23 21:36:14,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:36:14,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477177102] [2023-11-23 21:36:14,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:14,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms