./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-35.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/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_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-35.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/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_86ff84e1-2257-448e-8974-b404c9177ba0/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 e2827751d54d31813193a5e232b3cfb1b986bd1ad92439dc43412e6cd0eff047 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:41:14,210 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:41:14,365 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:41:14,377 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:41:14,382 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:41:14,431 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:41:14,432 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:41:14,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:41:14,436 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:41:14,442 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:41:14,443 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:41:14,444 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:41:14,446 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:41:14,448 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:41:14,449 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:41:14,449 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:41:14,450 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:41:14,451 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:41:14,451 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:41:14,452 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:41:14,452 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:41:14,453 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:41:14,454 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:41:14,454 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:41:14,455 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:41:14,456 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:41:14,456 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:41:14,457 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:41:14,458 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:41:14,459 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:41:14,460 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:41:14,461 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:41:14,461 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:41:14,462 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:41:14,462 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:41:14,463 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:41:14,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:41:14,463 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:41:14,464 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:41:14,464 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:41:14,464 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:41:14,465 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:41:14,465 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_86ff84e1-2257-448e-8974-b404c9177ba0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2827751d54d31813193a5e232b3cfb1b986bd1ad92439dc43412e6cd0eff047 [2023-11-23 22:41:14,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:41:14,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:41:14,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:41:14,878 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:41:14,879 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:41:14,881 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-35.i [2023-11-23 22:41:18,849 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:41:19,219 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:41:19,221 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-35.i [2023-11-23 22:41:19,244 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/data/9dedee11e/b553a70df3a24d3ba4a71bbe8d04c577/FLAGdbae67946 [2023-11-23 22:41:19,267 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/data/9dedee11e/b553a70df3a24d3ba4a71bbe8d04c577 [2023-11-23 22:41:19,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:41:19,276 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:41:19,281 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:41:19,281 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:41:19,288 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:41:19,289 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:41:19" (1/1) ... [2023-11-23 22:41:19,290 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50ba49c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:19, skipping insertion in model container [2023-11-23 22:41:19,291 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:41:19" (1/1) ... [2023-11-23 22:41:19,362 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:41:19,548 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_86ff84e1-2257-448e-8974-b404c9177ba0/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-35.i[916,929] [2023-11-23 22:41:19,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:41:19,702 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:41:19,719 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_86ff84e1-2257-448e-8974-b404c9177ba0/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-35.i[916,929] [2023-11-23 22:41:19,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:41:19,831 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:41:19,832 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:19 WrapperNode [2023-11-23 22:41:19,832 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:41:19,833 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:41:19,834 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:41:19,834 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:41:19,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:19" (1/1) ... [2023-11-23 22:41:19,886 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:19" (1/1) ... [2023-11-23 22:41:19,975 INFO L138 Inliner]: procedures = 26, calls = 73, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 372 [2023-11-23 22:41:19,976 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:41:19,977 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:41:19,977 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:41:19,977 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:41:19,995 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:19" (1/1) ... [2023-11-23 22:41:19,995 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:19" (1/1) ... [2023-11-23 22:41:20,002 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:19" (1/1) ... [2023-11-23 22:41:20,072 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 22:41:20,072 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:19" (1/1) ... [2023-11-23 22:41:20,072 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:19" (1/1) ... [2023-11-23 22:41:20,115 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:19" (1/1) ... [2023-11-23 22:41:20,121 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:19" (1/1) ... [2023-11-23 22:41:20,126 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:19" (1/1) ... [2023-11-23 22:41:20,147 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:19" (1/1) ... [2023-11-23 22:41:20,156 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:41:20,171 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:41:20,171 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:41:20,172 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:41:20,173 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:19" (1/1) ... [2023-11-23 22:41:20,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:41:20,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:20,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:41:20,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:41:20,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:41:20,296 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 22:41:20,296 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 22:41:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:41:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:41:20,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:41:20,432 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:41:20,435 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:41:21,289 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:41:21,337 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:41:21,337 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:41:21,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:41:21 BoogieIcfgContainer [2023-11-23 22:41:21,338 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:41:21,342 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:41:21,342 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:41:21,346 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:41:21,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:41:19" (1/3) ... [2023-11-23 22:41:21,347 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a92014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:41:21, skipping insertion in model container [2023-11-23 22:41:21,348 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:19" (2/3) ... [2023-11-23 22:41:21,348 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a92014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:41:21, skipping insertion in model container [2023-11-23 22:41:21,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:41:21" (3/3) ... [2023-11-23 22:41:21,350 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-100_file-35.i [2023-11-23 22:41:21,375 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:41:21,375 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:41:21,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:41:21,456 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;@2a3b35f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:41:21,456 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:41:21,463 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 87 states have internal predecessors, (126), 60 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-23 22:41:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2023-11-23 22:41:21,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:21,500 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:21,501 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:41:21,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:21,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1016803514, now seen corresponding path program 1 times [2023-11-23 22:41:21,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:21,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302681294] [2023-11-23 22:41:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:21,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:21,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:21,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302681294] [2023-11-23 22:41:21,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 22:41:21,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793060785] [2023-11-23 22:41:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:21,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:21,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:21,950 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:21,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:41:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:22,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 22:41:22,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 6962 trivial. 0 not checked. [2023-11-23 22:41:22,516 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:41:22,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793060785] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:41:22,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:41:22,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:41:22,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630695731] [2023-11-23 22:41:22,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:41:22,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:41:22,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:22,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:41:22,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:41:22,610 INFO L87 Difference]: Start difference. First operand has 149 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 87 states have internal predecessors, (126), 60 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) Second operand has 2 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (60), 2 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 2 states have call successors, (60) [2023-11-23 22:41:22,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:22,711 INFO L93 Difference]: Finished difference Result 295 states and 550 transitions. [2023-11-23 22:41:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:41:22,715 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (60), 2 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 2 states have call successors, (60) Word has length 364 [2023-11-23 22:41:22,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:22,729 INFO L225 Difference]: With dead ends: 295 [2023-11-23 22:41:22,729 INFO L226 Difference]: Without dead ends: 147 [2023-11-23 22:41:22,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 363 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 22:41:22,741 INFO L413 NwaCegarLoop]: 238 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, 238 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 22:41:22,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 238 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:41:22,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-23 22:41:22,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-11-23 22:41:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 85 states have (on average 1.423529411764706) internal successors, (121), 85 states have internal predecessors, (121), 60 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-23 22:41:22,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 241 transitions. [2023-11-23 22:41:22,847 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 241 transitions. Word has length 364 [2023-11-23 22:41:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:22,848 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 241 transitions. [2023-11-23 22:41:22,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (60), 2 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 2 states have call successors, (60) [2023-11-23 22:41:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 241 transitions. [2023-11-23 22:41:22,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2023-11-23 22:41:22,862 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:22,863 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:22,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 22:41:23,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 22:41:23,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:41:23,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:23,092 INFO L85 PathProgramCache]: Analyzing trace with hash 855442738, now seen corresponding path program 1 times [2023-11-23 22:41:23,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:23,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676138917] [2023-11-23 22:41:23,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:23,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:23,283 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:41:23,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402453415] [2023-11-23 22:41:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:23,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:23,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:23,296 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:23,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:41:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:23,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:41:23,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-23 22:41:23,769 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:41:23,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:23,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676138917] [2023-11-23 22:41:23,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:41:23,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402453415] [2023-11-23 22:41:23,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402453415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:41:23,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:41:23,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:41:23,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153011061] [2023-11-23 22:41:23,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:41:23,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:41:23,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:23,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:41:23,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:41:23,785 INFO L87 Difference]: Start difference. First operand 147 states and 241 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-23 22:41:23,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:23,893 INFO L93 Difference]: Finished difference Result 293 states and 481 transitions. [2023-11-23 22:41:23,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:41:23,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 364 [2023-11-23 22:41:23,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:23,906 INFO L225 Difference]: With dead ends: 293 [2023-11-23 22:41:23,908 INFO L226 Difference]: Without dead ends: 147 [2023-11-23 22:41:23,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 362 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 22:41:23,918 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 18 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:41:23,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 452 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:41:23,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-23 22:41:23,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-11-23 22:41:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 85 states have (on average 1.411764705882353) internal successors, (120), 85 states have internal predecessors, (120), 60 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-23 22:41:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 240 transitions. [2023-11-23 22:41:23,982 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 240 transitions. Word has length 364 [2023-11-23 22:41:23,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:23,988 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 240 transitions. [2023-11-23 22:41:23,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-23 22:41:23,989 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 240 transitions. [2023-11-23 22:41:24,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-11-23 22:41:24,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:24,032 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:24,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:24,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:24,259 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:41:24,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:24,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1106707692, now seen corresponding path program 1 times [2023-11-23 22:41:24,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:24,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393290014] [2023-11-23 22:41:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:24,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:24,409 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:41:24,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670677489] [2023-11-23 22:41:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:24,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:24,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:24,411 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:24,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:41:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:24,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:41:24,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-23 22:41:24,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:41:24,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:24,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393290014] [2023-11-23 22:41:24,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:41:24,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670677489] [2023-11-23 22:41:24,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670677489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:41:24,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:41:24,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:41:24,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206257878] [2023-11-23 22:41:24,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:41:24,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:41:24,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:24,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:41:24,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:41:24,865 INFO L87 Difference]: Start difference. First operand 147 states and 240 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-23 22:41:24,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:24,978 INFO L93 Difference]: Finished difference Result 376 states and 613 transitions. [2023-11-23 22:41:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:41:24,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 365 [2023-11-23 22:41:24,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:24,986 INFO L225 Difference]: With dead ends: 376 [2023-11-23 22:41:24,987 INFO L226 Difference]: Without dead ends: 230 [2023-11-23 22:41:24,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 363 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 22:41:24,992 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 126 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:41:24,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 464 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:41:25,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-11-23 22:41:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2023-11-23 22:41:25,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 144 states have (on average 1.4583333333333333) internal successors, (210), 145 states have internal predecessors, (210), 80 states have call successors, (80), 2 states have call predecessors, (80), 2 states have return successors, (80), 79 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-23 22:41:25,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 370 transitions. [2023-11-23 22:41:25,077 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 370 transitions. Word has length 365 [2023-11-23 22:41:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:25,081 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 370 transitions. [2023-11-23 22:41:25,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-23 22:41:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 370 transitions. [2023-11-23 22:41:25,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-11-23 22:41:25,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:25,089 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:25,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:25,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:25,315 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:41:25,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:25,316 INFO L85 PathProgramCache]: Analyzing trace with hash -698730642, now seen corresponding path program 1 times [2023-11-23 22:41:25,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:25,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602483227] [2023-11-23 22:41:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:25,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:25,399 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:41:25,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528423186] [2023-11-23 22:41:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:25,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:25,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:25,402 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:25,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:41:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:25,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:41:25,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3599 proven. 87 refuted. 0 times theorem prover too weak. 3394 trivial. 0 not checked. [2023-11-23 22:41:26,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:41:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 90 proven. 87 refuted. 0 times theorem prover too weak. 6903 trivial. 0 not checked. [2023-11-23 22:41:26,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:26,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602483227] [2023-11-23 22:41:26,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:41:26,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528423186] [2023-11-23 22:41:26,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528423186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:41:26,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:41:26,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-23 22:41:26,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699485309] [2023-11-23 22:41:26,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:41:26,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:41:26,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:26,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:41:26,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:41:26,727 INFO L87 Difference]: Start difference. First operand 227 states and 370 transitions. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 3 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 3 states have call predecessors, (90), 3 states have call successors, (90) [2023-11-23 22:41:27,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:27,452 INFO L93 Difference]: Finished difference Result 463 states and 750 transitions. [2023-11-23 22:41:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:41:27,453 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 3 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 3 states have call predecessors, (90), 3 states have call successors, (90) Word has length 365 [2023-11-23 22:41:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:27,459 INFO L225 Difference]: With dead ends: 463 [2023-11-23 22:41:27,459 INFO L226 Difference]: Without dead ends: 237 [2023-11-23 22:41:27,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 720 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:41:27,462 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 233 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:41:27,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 532 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:41:27,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-23 22:41:27,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 233. [2023-11-23 22:41:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 149 states have (on average 1.4429530201342282) internal successors, (215), 150 states have internal predecessors, (215), 80 states have call successors, (80), 3 states have call predecessors, (80), 3 states have return successors, (80), 79 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-23 22:41:27,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 375 transitions. [2023-11-23 22:41:27,535 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 375 transitions. Word has length 365 [2023-11-23 22:41:27,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:27,537 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 375 transitions. [2023-11-23 22:41:27,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 3 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 3 states have call predecessors, (90), 3 states have call successors, (90) [2023-11-23 22:41:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 375 transitions. [2023-11-23 22:41:27,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2023-11-23 22:41:27,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:27,543 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:27,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:27,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:27,780 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:41:27,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:27,781 INFO L85 PathProgramCache]: Analyzing trace with hash 19634387, now seen corresponding path program 1 times [2023-11-23 22:41:27,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:27,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58626585] [2023-11-23 22:41:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:27,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:27,871 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:41:27,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857057170] [2023-11-23 22:41:27,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:27,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:27,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:27,873 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:27,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:41:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:28,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:41:28,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3579 proven. 81 refuted. 0 times theorem prover too weak. 3420 trivial. 0 not checked. [2023-11-23 22:41:28,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:41:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 96 proven. 81 refuted. 0 times theorem prover too weak. 6903 trivial. 0 not checked. [2023-11-23 22:41:28,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:28,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58626585] [2023-11-23 22:41:28,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:41:28,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857057170] [2023-11-23 22:41:28,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857057170] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:41:28,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:41:28,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-23 22:41:28,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366662307] [2023-11-23 22:41:28,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:41:28,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:41:28,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:28,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:41:28,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:41:28,798 INFO L87 Difference]: Start difference. First operand 233 states and 375 transitions. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 3 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) [2023-11-23 22:41:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:29,582 INFO L93 Difference]: Finished difference Result 473 states and 756 transitions. [2023-11-23 22:41:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:41:29,583 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 3 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) Word has length 366 [2023-11-23 22:41:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:29,588 INFO L225 Difference]: With dead ends: 473 [2023-11-23 22:41:29,589 INFO L226 Difference]: Without dead ends: 241 [2023-11-23 22:41:29,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 722 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:41:29,592 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 227 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:41:29,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 652 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:41:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-11-23 22:41:29,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 235. [2023-11-23 22:41:29,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 150 states have (on average 1.4133333333333333) internal successors, (212), 151 states have internal predecessors, (212), 80 states have call successors, (80), 4 states have call predecessors, (80), 4 states have return successors, (80), 79 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-23 22:41:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 372 transitions. [2023-11-23 22:41:29,654 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 372 transitions. Word has length 366 [2023-11-23 22:41:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:29,656 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 372 transitions. [2023-11-23 22:41:29,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 3 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) [2023-11-23 22:41:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 372 transitions. [2023-11-23 22:41:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2023-11-23 22:41:29,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:29,661 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:29,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:29,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:29,887 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:41:29,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:29,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1942862421, now seen corresponding path program 1 times [2023-11-23 22:41:29,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:29,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393201233] [2023-11-23 22:41:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:29,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:29,953 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:41:29,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598218710] [2023-11-23 22:41:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:29,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:29,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:29,955 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:29,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:41:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:30,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 22:41:30,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3740 proven. 165 refuted. 0 times theorem prover too weak. 3175 trivial. 0 not checked. [2023-11-23 22:41:30,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:41:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 183 proven. 168 refuted. 0 times theorem prover too weak. 6729 trivial. 0 not checked. [2023-11-23 22:41:31,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:31,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393201233] [2023-11-23 22:41:31,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:41:31,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598218710] [2023-11-23 22:41:31,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598218710] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:41:31,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:41:31,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-23 22:41:31,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744462846] [2023-11-23 22:41:31,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:41:31,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 22:41:31,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:31,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 22:41:31,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:41:31,620 INFO L87 Difference]: Start difference. First operand 235 states and 372 transitions. Second operand has 16 states, 16 states have (on average 6.6875) internal successors, (107), 16 states have internal predecessors, (107), 5 states have call successors, (89), 3 states have call predecessors, (89), 7 states have return successors, (90), 5 states have call predecessors, (90), 5 states have call successors, (90) [2023-11-23 22:41:32,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:32,536 INFO L93 Difference]: Finished difference Result 477 states and 750 transitions. [2023-11-23 22:41:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 22:41:32,537 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.6875) internal successors, (107), 16 states have internal predecessors, (107), 5 states have call successors, (89), 3 states have call predecessors, (89), 7 states have return successors, (90), 5 states have call predecessors, (90), 5 states have call successors, (90) Word has length 366 [2023-11-23 22:41:32,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:32,540 INFO L225 Difference]: With dead ends: 477 [2023-11-23 22:41:32,541 INFO L226 Difference]: Without dead ends: 243 [2023-11-23 22:41:32,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2023-11-23 22:41:32,544 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 503 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 22:41:32,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 641 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 22:41:32,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-11-23 22:41:32,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 237. [2023-11-23 22:41:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 151 states have (on average 1.3973509933774835) internal successors, (211), 152 states have internal predecessors, (211), 80 states have call successors, (80), 5 states have call predecessors, (80), 5 states have return successors, (80), 79 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-23 22:41:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 371 transitions. [2023-11-23 22:41:32,587 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 371 transitions. Word has length 366 [2023-11-23 22:41:32,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:32,589 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 371 transitions. [2023-11-23 22:41:32,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.6875) internal successors, (107), 16 states have internal predecessors, (107), 5 states have call successors, (89), 3 states have call predecessors, (89), 7 states have return successors, (90), 5 states have call predecessors, (90), 5 states have call successors, (90) [2023-11-23 22:41:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 371 transitions. [2023-11-23 22:41:32,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2023-11-23 22:41:32,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:32,594 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:32,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:32,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 22:41:32,807 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:41:32,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:32,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1836642277, now seen corresponding path program 1 times [2023-11-23 22:41:32,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:32,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290064668] [2023-11-23 22:41:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:32,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:32,858 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:41:32,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355103359] [2023-11-23 22:41:32,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:32,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:32,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:32,860 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:32,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:41:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:33,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:41:33,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-23 22:41:33,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:41:33,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:33,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290064668] [2023-11-23 22:41:33,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:41:33,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355103359] [2023-11-23 22:41:33,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355103359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:41:33,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:41:33,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:41:33,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796921779] [2023-11-23 22:41:33,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:41:33,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:41:33,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:33,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:41:33,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:41:33,185 INFO L87 Difference]: Start difference. First operand 237 states and 371 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-23 22:41:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:33,633 INFO L93 Difference]: Finished difference Result 771 states and 1200 transitions. [2023-11-23 22:41:33,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:41:33,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 367 [2023-11-23 22:41:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:33,640 INFO L225 Difference]: With dead ends: 771 [2023-11-23 22:41:33,641 INFO L226 Difference]: Without dead ends: 535 [2023-11-23 22:41:33,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:41:33,643 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 302 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:41:33,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 748 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:41:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2023-11-23 22:41:33,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 319. [2023-11-23 22:41:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 217 states have (on average 1.4055299539170507) internal successors, (305), 220 states have internal predecessors, (305), 94 states have call successors, (94), 7 states have call predecessors, (94), 7 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2023-11-23 22:41:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 493 transitions. [2023-11-23 22:41:33,698 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 493 transitions. Word has length 367 [2023-11-23 22:41:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:33,699 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 493 transitions. [2023-11-23 22:41:33,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-23 22:41:33,700 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 493 transitions. [2023-11-23 22:41:33,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2023-11-23 22:41:33,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:33,704 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:33,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:33,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 22:41:33,926 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:41:33,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:33,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1135577699, now seen corresponding path program 1 times [2023-11-23 22:41:33,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:33,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694206503] [2023-11-23 22:41:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:33,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:33,974 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:41:33,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530759494] [2023-11-23 22:41:33,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:33,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:33,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:33,976 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:33,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:41:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:34,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:41:34,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-23 22:41:34,796 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:41:34,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:34,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694206503] [2023-11-23 22:41:34,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:41:34,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530759494] [2023-11-23 22:41:34,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530759494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:41:34,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:41:34,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:41:34,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881071652] [2023-11-23 22:41:34,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:41:34,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:41:34,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:34,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:41:34,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:41:34,800 INFO L87 Difference]: Start difference. First operand 319 states and 493 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-23 22:41:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:35,118 INFO L93 Difference]: Finished difference Result 1013 states and 1560 transitions. [2023-11-23 22:41:35,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:41:35,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 367 [2023-11-23 22:41:35,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:35,126 INFO L225 Difference]: With dead ends: 1013 [2023-11-23 22:41:35,126 INFO L226 Difference]: Without dead ends: 695 [2023-11-23 22:41:35,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 364 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 22:41:35,129 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 176 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:41:35,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 706 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:41:35,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2023-11-23 22:41:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 635. [2023-11-23 22:41:35,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 432 states have (on average 1.4027777777777777) internal successors, (606), 438 states have internal predecessors, (606), 188 states have call successors, (188), 14 states have call predecessors, (188), 14 states have return successors, (188), 182 states have call predecessors, (188), 188 states have call successors, (188) [2023-11-23 22:41:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 982 transitions. [2023-11-23 22:41:35,247 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 982 transitions. Word has length 367 [2023-11-23 22:41:35,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:35,248 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 982 transitions. [2023-11-23 22:41:35,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-23 22:41:35,249 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 982 transitions. [2023-11-23 22:41:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2023-11-23 22:41:35,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:35,252 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:35,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:35,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:35,467 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:41:35,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1165244891, now seen corresponding path program 1 times [2023-11-23 22:41:35,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:35,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082245972] [2023-11-23 22:41:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:35,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:35,517 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:41:35,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490553897] [2023-11-23 22:41:35,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:35,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:35,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:35,519 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:35,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:41:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:35,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 22:41:35,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 1707 proven. 153 refuted. 0 times theorem prover too weak. 5220 trivial. 0 not checked. [2023-11-23 22:41:36,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:41:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-23 22:41:36,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:36,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082245972] [2023-11-23 22:41:36,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:41:36,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490553897] [2023-11-23 22:41:36,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490553897] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:41:36,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:41:36,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-11-23 22:41:36,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598612862] [2023-11-23 22:41:36,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:41:36,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:41:36,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:36,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:41:36,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:41:36,814 INFO L87 Difference]: Start difference. First operand 635 states and 982 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-23 22:41:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:37,091 INFO L93 Difference]: Finished difference Result 1277 states and 1944 transitions. [2023-11-23 22:41:37,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:41:37,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 367 [2023-11-23 22:41:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:37,100 INFO L225 Difference]: With dead ends: 1277 [2023-11-23 22:41:37,101 INFO L226 Difference]: Without dead ends: 959 [2023-11-23 22:41:37,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 722 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:41:37,103 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 99 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:41:37,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 651 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:41:37,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2023-11-23 22:41:37,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 687. [2023-11-23 22:41:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 484 states have (on average 1.4173553719008265) internal successors, (686), 490 states have internal predecessors, (686), 188 states have call successors, (188), 14 states have call predecessors, (188), 14 states have return successors, (188), 182 states have call predecessors, (188), 188 states have call successors, (188) [2023-11-23 22:41:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1062 transitions. [2023-11-23 22:41:37,216 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1062 transitions. Word has length 367 [2023-11-23 22:41:37,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:37,216 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 1062 transitions. [2023-11-23 22:41:37,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-23 22:41:37,217 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1062 transitions. [2023-11-23 22:41:37,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2023-11-23 22:41:37,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:37,221 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:37,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:37,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:37,442 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:41:37,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:37,443 INFO L85 PathProgramCache]: Analyzing trace with hash 355898265, now seen corresponding path program 1 times [2023-11-23 22:41:37,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:37,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741136578] [2023-11-23 22:41:37,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:37,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:37,509 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:41:37,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436796441] [2023-11-23 22:41:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:37,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:37,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:37,515 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:37,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ff84e1-2257-448e-8974-b404c9177ba0/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:41:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:37,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 22:41:37,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 1667 proven. 39 refuted. 0 times theorem prover too weak. 5374 trivial. 0 not checked. [2023-11-23 22:41:38,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:42:01,016 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse19 (mod c_~var_1_52~0 256)) (.cse18 (mod c_~var_1_51~0 256))) (let ((.cse8 (< c_~var_1_35~0 2)) (.cse3 (< .cse19 (+ .cse18 1))) (.cse2 (< 1 c_~var_1_35~0)) (.cse1 (+ .cse18 (* (- 1) .cse19))) (.cse0 (mod c_~var_1_50~0 256))) (and (or (forall ((v_z_51 Int)) (or (< 255 v_z_51) (< c_~var_1_35~0 (+ (div (mod v_z_51 .cse0) .cse1) 2)) (< v_z_51 0))) .cse2) (or .cse3 (and (forall ((v_z_7 Int)) (let ((.cse4 (mod v_z_7 .cse0))) (let ((.cse5 (div .cse4 .cse1))) (or (< 0 (+ .cse4 1)) (< 1 .cse5) (= (mod .cse4 .cse1) 0) (< 255 v_z_7) (< v_z_7 0) (< c_~var_1_35~0 .cse5))))) (or (forall ((v_z_7 Int)) (let ((.cse6 (mod v_z_7 .cse0))) (or (< 0 (+ .cse6 1)) (= (mod .cse6 .cse1) 0) (< 255 v_z_7) (< v_z_7 0) (< c_~var_1_35~0 (div .cse6 .cse1))))) .cse2))) (or (forall ((v_z_14 Int)) (let ((.cse7 (mod v_z_14 .cse0))) (or (< .cse7 0) (< 0 (div .cse7 .cse1)) (< 255 v_z_14) (< v_z_14 0)))) .cse8) (forall ((v_z_60 Int)) (let ((.cse10 (mod v_z_60 .cse0))) (let ((.cse9 (div .cse10 .cse1))) (or (< c_~var_1_35~0 (+ .cse9 2)) (< 255 v_z_60) (< 0 .cse9) (< v_z_60 0) (= .cse9 0) (not (= (mod .cse10 .cse1) 0)))))) (or (forall ((v_z_67 Int)) (let ((.cse11 (mod v_z_67 .cse0))) (or (not (= (mod .cse11 .cse1) 0)) (< 255 v_z_67) (< c_~var_1_35~0 (+ 2 (div .cse11 .cse1))) (< v_z_67 0)))) .cse2) (forall ((v_z_14 Int)) (let ((.cse12 (mod v_z_14 .cse0))) (let ((.cse13 (div .cse12 .cse1))) (or (< .cse12 0) (< 0 .cse13) (< 255 v_z_14) (< c_~var_1_35~0 (+ .cse13 1)) (< v_z_14 0))))) (or .cse8 (and (forall ((v_z_82 Int)) (let ((.cse14 (mod v_z_82 .cse0))) (or (< .cse14 0) (< 0 (+ (div .cse14 .cse1) 1)) (< 255 v_z_82) (< v_z_82 0)))) (or (forall ((v_z_84 Int)) (let ((.cse16 (mod v_z_84 .cse0))) (let ((.cse15 (div .cse16 .cse1))) (or (= .cse15 1) (not (= (mod .cse16 .cse1) 0)) (< 1 .cse15) (< v_z_84 0) (< 255 v_z_84))))) .cse3) (or (forall ((v_z_87 Int)) (let ((.cse17 (mod v_z_87 .cse0))) (or (< 0 (div .cse17 .cse1)) (< 255 v_z_87) (< v_z_87 0) (not (= (mod .cse17 .cse1) 0))))) .cse3) (or (< .cse18 .cse19) (forall ((v_z_82 Int)) (let ((.cse20 (mod v_z_82 .cse0))) (let ((.cse21 (div .cse20 .cse1))) (or (< .cse20 0) (= .cse21 0) (< 0 .cse21) (< 255 v_z_82) (< v_z_82 0)))))) (or (forall ((v_z_82 Int)) (or (< (mod v_z_82 .cse0) 0) (< 255 v_z_82) (< v_z_82 0))) .cse3) (forall ((v_z_87 Int)) (let ((.cse23 (mod v_z_87 .cse0))) (let ((.cse22 (div .cse23 .cse1))) (or (< 0 .cse22) (< 255 v_z_87) (< v_z_87 0) (not (= (mod .cse23 .cse1) 0)) (= .cse22 0))))) (or .cse3 (forall ((v_z_79 Int)) (let ((.cse24 (div (mod v_z_79 .cse0) .cse1))) (or (< v_z_79 0) (< 1 .cse24) (< 255 v_z_79) (= .cse24 1))))) (or (forall ((v_z_81 Int)) (or (< v_z_81 0) (< 255 v_z_81) (< 0 (div (mod v_z_81 .cse0) .cse1)))) .cse3) (forall ((v_z_81 Int)) (let ((.cse25 (div (mod v_z_81 .cse0) .cse1))) (or (< v_z_81 0) (= 0 .cse25) (< 255 v_z_81) (< 0 .cse25)))))) (or .cse3 (and (forall ((v_z_74 Int)) (let ((.cse26 (div (mod v_z_74 .cse0) .cse1))) (or (< v_z_74 0) (< 1 .cse26) (< c_~var_1_35~0 (+ .cse26 2)) (< 255 v_z_74) (= .cse26 1)))) (or .cse2 (forall ((v_z_72 Int)) (or (< v_z_72 0) (< c_~var_1_35~0 (+ (div (mod v_z_72 .cse0) .cse1) 2)) (< 255 v_z_72)))))) (or (forall ((v_z_53 Int)) (or (< v_z_53 0) (< 255 v_z_53) (< c_~var_1_35~0 (+ 2 (div (mod v_z_53 .cse0) .cse1))))) .cse2) (or (and (forall ((v_z_54 Int)) (let ((.cse27 (div (mod v_z_54 .cse0) .cse1))) (or (< 1 .cse27) (< 255 v_z_54) (< c_~var_1_35~0 (+ 2 .cse27)) (< v_z_54 0) (= .cse27 1)))) (or (forall ((v_z_54 Int)) (or (< 255 v_z_54) (< c_~var_1_35~0 (+ 2 (div (mod v_z_54 .cse0) .cse1))) (< v_z_54 0))) .cse2)) .cse3) (forall ((v_z_26 Int)) (let ((.cse29 (mod v_z_26 .cse0))) (let ((.cse28 (div .cse29 .cse1))) (or (< v_z_26 0) (< 0 .cse28) (not (= (mod .cse29 .cse1) 0)) (< c_~var_1_35~0 (+ .cse28 1)) (< 255 v_z_26))))) (or (forall ((v_z_14 Int)) (let ((.cse30 (div (mod v_z_14 .cse0) .cse1))) (or (< 0 .cse30) (< 255 v_z_14) (< c_~var_1_35~0 (+ .cse30 1)) (< v_z_14 0)))) .cse3) (or (forall ((v_z_9 Int)) (let ((.cse31 (mod v_z_9 .cse0))) (or (< v_z_9 0) (< c_~var_1_35~0 (+ 2 (div .cse31 .cse1))) (< 0 (+ .cse31 1)) (= (mod .cse31 .cse1) 0) (< 255 v_z_9)))) .cse2) (or (forall ((v_z_28 Int)) (let ((.cse32 (mod v_z_28 .cse0))) (or (not (= (mod .cse32 .cse1) 0)) (< v_z_28 0) (< 255 v_z_28) (< c_~var_1_35~0 (+ (div .cse32 .cse1) 1))))) .cse2) (or (and (forall ((v_z_44 Int)) (let ((.cse34 (mod v_z_44 .cse0))) (let ((.cse33 (div .cse34 .cse1))) (or (< v_z_44 0) (< 0 .cse33) (< c_~var_1_35~0 .cse33) (< 255 v_z_44) (= .cse33 c_~var_1_35~0) (not (= (mod .cse34 .cse1) 0)))))) (or (forall ((v_z_38 Int)) (let ((.cse35 (div (mod v_z_38 .cse0) .cse1))) (or (< 255 v_z_38) (< v_z_38 0) (< c_~var_1_35~0 .cse35) (= .cse35 c_~var_1_35~0)))) .cse2) (or (forall ((v_z_38 Int)) (or (< 255 v_z_38) (< (mod v_z_38 .cse0) 0) (< v_z_38 0))) .cse8) (or (forall ((v_z_40 Int)) (let ((.cse36 (div (mod v_z_40 .cse0) .cse1))) (or (= c_~var_1_35~0 .cse36) (< c_~var_1_35~0 .cse36) (< v_z_40 0) (< 255 v_z_40)))) .cse2) (or (forall ((v_z_44 Int)) (let ((.cse37 (mod v_z_44 .cse0))) (or (< v_z_44 0) (< 0 (div .cse37 .cse1)) (< 255 v_z_44) (not (= (mod .cse37 .cse1) 0))))) .cse8) (forall ((v_z_38 Int)) (let ((.cse38 (mod v_z_38 .cse0))) (let ((.cse39 (div .cse38 .cse1))) (or (< 255 v_z_38) (< .cse38 0) (< v_z_38 0) (< c_~var_1_35~0 .cse39) (= .cse39 c_~var_1_35~0))))) (or .cse8 (forall ((v_z_32 Int)) (let ((.cse40 (div (mod v_z_32 .cse0) .cse1))) (or (= .cse40 1) (< 1 .cse40) (< v_z_32 0) (< 255 v_z_32))))) (or (forall ((v_z_35 Int)) (let ((.cse41 (div (mod v_z_35 .cse0) .cse1))) (or (< 255 v_z_35) (< v_z_35 0) (= .cse41 c_~var_1_35~0) (< c_~var_1_35~0 .cse41)))) .cse2) (or (forall ((v_z_47 Int)) (let ((.cse43 (mod v_z_47 .cse0))) (let ((.cse42 (div .cse43 .cse1))) (or (< c_~var_1_35~0 .cse42) (= .cse42 c_~var_1_35~0) (not (= 0 (mod .cse43 .cse1))) (< v_z_47 0) (< 255 v_z_47))))) .cse2) (forall ((v_z_32 Int)) (let ((.cse44 (div (mod v_z_32 .cse0) .cse1))) (or (= .cse44 1) (= .cse44 c_~var_1_35~0) (< 1 .cse44) (< v_z_32 0) (< 255 v_z_32) (< c_~var_1_35~0 .cse44))))) .cse3) (or (and (forall ((v_z_19 Int)) (let ((.cse45 (mod v_z_19 .cse0))) (or (< v_z_19 0) (< 0 (div .cse45 .cse1)) (not (= (mod .cse45 .cse1) 0)) (< 255 v_z_19)))) (or (forall ((v_z_17 Int)) (let ((.cse46 (mod v_z_17 .cse0))) (or (< 255 v_z_17) (not (= (mod .cse46 .cse1) 0)) (< v_z_17 0) (< 0 (div .cse46 .cse1))))) .cse3)) .cse8) (or (forall ((v_z_60 Int)) (let ((.cse48 (mod v_z_60 .cse0))) (let ((.cse47 (div .cse48 .cse1))) (or (< c_~var_1_35~0 (+ .cse47 2)) (< 255 v_z_60) (< 0 .cse47) (< v_z_60 0) (not (= (mod .cse48 .cse1) 0)))))) .cse3) (or (forall ((v_z_77 Int)) (let ((.cse49 (div (mod v_z_77 .cse0) .cse1))) (or (< c_~var_1_35~0 (+ .cse49 2)) (< 255 v_z_77) (< v_z_77 0) (< 0 .cse49)))) .cse3) (or (forall ((v_z_9 Int)) (let ((.cse51 (mod v_z_9 .cse0))) (let ((.cse50 (div .cse51 .cse1))) (or (< v_z_9 0) (< c_~var_1_35~0 (+ 2 .cse50)) (< 0 (+ .cse51 1)) (= (mod .cse51 .cse1) 0) (< 1 .cse50) (< 255 v_z_9))))) .cse3) (or (forall ((v_z_63 Int)) (let ((.cse52 (mod v_z_63 .cse0))) (let ((.cse53 (div .cse52 .cse1))) (or (not (= (mod .cse52 .cse1) 0)) (= .cse53 1) (< 255 v_z_63) (< c_~var_1_35~0 (+ 2 .cse53)) (< v_z_63 0) (< 1 .cse53))))) .cse3) (or (forall ((v_z_25 Int)) (let ((.cse55 (mod v_z_25 .cse0))) (let ((.cse54 (div .cse55 .cse1))) (or (< 0 .cse54) (not (= (mod .cse55 .cse1) 0)) (< c_~var_1_35~0 (+ .cse54 1)) (< 255 v_z_25) (< v_z_25 0))))) .cse3) (or .cse8 (and (or .cse3 (forall ((v_z_12 Int)) (let ((.cse56 (mod v_z_12 .cse0))) (or (< 255 v_z_12) (< v_z_12 0) (< 0 (+ .cse56 1)) (< 1 (div .cse56 .cse1)) (= (mod .cse56 .cse1) 0))))) (forall ((v_z_12 Int)) (let ((.cse57 (mod v_z_12 .cse0))) (or (< 255 v_z_12) (< 0 (+ (div .cse57 .cse1) 1)) (< v_z_12 0) (< 0 (+ .cse57 1)) (= (mod .cse57 .cse1) 0)))))) (forall ((v_z_54 Int)) (let ((.cse59 (mod v_z_54 .cse0))) (let ((.cse58 (div .cse59 .cse1))) (or (< 255 v_z_54) (< 0 (+ .cse58 1)) (< .cse59 0) (< c_~var_1_35~0 (+ 2 .cse58)) (< v_z_54 0))))) (forall ((v_z_77 Int)) (let ((.cse60 (div (mod v_z_77 .cse0) .cse1))) (or (< c_~var_1_35~0 (+ .cse60 2)) (= .cse60 0) (< 255 v_z_77) (< v_z_77 0) (< 0 .cse60)))) (or (and (or .cse3 (forall ((v_z_14 Int)) (or (< 255 v_z_14) (< c_~var_1_35~0 (+ (div (mod v_z_14 .cse0) .cse1) 1)) (< v_z_14 0)))) (forall ((v_z_14 Int)) (let ((.cse61 (mod v_z_14 .cse0))) (or (< .cse61 0) (< 255 v_z_14) (< c_~var_1_35~0 (+ (div .cse61 .cse1) 1)) (< v_z_14 0))))) .cse2) (forall ((v_z_9 Int)) (let ((.cse63 (mod v_z_9 .cse0))) (let ((.cse62 (div .cse63 .cse1))) (or (< 0 (+ .cse62 1)) (< v_z_9 0) (< c_~var_1_35~0 (+ 2 .cse62)) (< 0 (+ .cse63 1)) (= (mod .cse63 .cse1) 0) (< 255 v_z_9)))))))) is different from true