./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-85.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/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_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-85.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/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_3b370d6b-52f6-42a7-81e5-0cf13740956b/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 ca6e4c9424ce788edffc7e38265d581995e88f82a3064eb9de3661dcf45cf369 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:33:55,173 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:33:55,286 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 21:33:55,297 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:33:55,298 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:33:55,335 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:33:55,336 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:33:55,337 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:33:55,338 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 21:33:55,343 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 21:33:55,343 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:33:55,344 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:33:55,345 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:33:55,347 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:33:55,347 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 21:33:55,348 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:33:55,348 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:33:55,349 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:33:55,349 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:33:55,350 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:33:55,350 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:33:55,351 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:33:55,351 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:33:55,352 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:33:55,352 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:33:55,353 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:33:55,353 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:33:55,354 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:33:55,354 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:33:55,355 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:33:55,355 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:33:55,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:33:55,356 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:33:55,356 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:33:55,357 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:33:55,357 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 21:33:55,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:33:55,358 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:33:55,358 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 21:33:55,358 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:33:55,359 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 21:33:55,359 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:33:55,359 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_3b370d6b-52f6-42a7-81e5-0cf13740956b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca6e4c9424ce788edffc7e38265d581995e88f82a3064eb9de3661dcf45cf369 [2023-11-23 21:33:55,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:33:55,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:33:55,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:33:55,711 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:33:55,711 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:33:55,712 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-85.i [2023-11-23 21:33:58,946 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:33:59,348 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:33:59,352 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-85.i [2023-11-23 21:33:59,371 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/data/d06b27a10/e32a2e68072e4981b3b1a178c6edb49e/FLAG9a103725b [2023-11-23 21:33:59,390 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/data/d06b27a10/e32a2e68072e4981b3b1a178c6edb49e [2023-11-23 21:33:59,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:33:59,403 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:33:59,407 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:33:59,407 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:33:59,415 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:33:59,416 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:33:59" (1/1) ... [2023-11-23 21:33:59,418 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71f0bbbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:59, skipping insertion in model container [2023-11-23 21:33:59,418 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:33:59" (1/1) ... [2023-11-23 21:33:59,470 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:33:59,621 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_3b370d6b-52f6-42a7-81e5-0cf13740956b/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-85.i[916,929] [2023-11-23 21:33:59,809 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:33:59,837 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:33:59,857 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_3b370d6b-52f6-42a7-81e5-0cf13740956b/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-85.i[916,929] [2023-11-23 21:34:00,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:34:00,033 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:34:00,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:34:00 WrapperNode [2023-11-23 21:34:00,034 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:34:00,035 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:34:00,036 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:34:00,036 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:34:00,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:34:00" (1/1) ... [2023-11-23 21:34:00,076 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:34:00" (1/1) ... [2023-11-23 21:34:00,234 INFO L138 Inliner]: procedures = 26, calls = 65, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 489 [2023-11-23 21:34:00,245 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:34:00,246 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:34:00,246 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:34:00,246 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:34:00,258 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:34:00" (1/1) ... [2023-11-23 21:34:00,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:34:00" (1/1) ... [2023-11-23 21:34:00,303 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:34:00" (1/1) ... [2023-11-23 21:34:00,347 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 21:34:00,347 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:34:00" (1/1) ... [2023-11-23 21:34:00,348 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:34:00" (1/1) ... [2023-11-23 21:34:00,371 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:34:00" (1/1) ... [2023-11-23 21:34:00,378 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:34:00" (1/1) ... [2023-11-23 21:34:00,388 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:34:00" (1/1) ... [2023-11-23 21:34:00,395 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:34:00" (1/1) ... [2023-11-23 21:34:00,429 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:34:00,430 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:34:00,433 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:34:00,434 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:34:00,435 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:34:00" (1/1) ... [2023-11-23 21:34:00,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:34:00,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:34:00,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:34:00,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:34:00,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:34:00,525 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:34:00,526 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:34:00,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 21:34:00,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:34:00,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:34:00,695 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:34:00,698 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:34:01,635 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:34:01,689 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:34:01,694 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:34:01,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:34:01 BoogieIcfgContainer [2023-11-23 21:34:01,695 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:34:01,698 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:34:01,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:34:01,702 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:34:01,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:33:59" (1/3) ... [2023-11-23 21:34:01,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6f317a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:34:01, skipping insertion in model container [2023-11-23 21:34:01,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:34:00" (2/3) ... [2023-11-23 21:34:01,707 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6f317a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:34:01, skipping insertion in model container [2023-11-23 21:34:01,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:34:01" (3/3) ... [2023-11-23 21:34:01,710 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-85.i [2023-11-23 21:34:01,728 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:34:01,728 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:34:01,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:34:01,793 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;@3f59fb06, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:34:01,793 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:34:01,799 INFO L276 IsEmpty]: Start isEmpty. Operand has 179 states, 124 states have (on average 1.5403225806451613) internal successors, (191), 125 states have internal predecessors, (191), 52 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 21:34:01,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2023-11-23 21:34:01,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:34:01,826 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:34:01,826 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:34:01,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:34:01,832 INFO L85 PathProgramCache]: Analyzing trace with hash 424933769, now seen corresponding path program 1 times [2023-11-23 21:34:01,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:34:01,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697927905] [2023-11-23 21:34:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:01,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:34:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:34:02,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:34:02,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697927905] [2023-11-23 21:34:02,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 21:34:02,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546973938] [2023-11-23 21:34:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:02,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:02,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:34:02,304 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:34:02,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:34:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:34:02,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 21:34:02,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:34:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 5202 trivial. 0 not checked. [2023-11-23 21:34:02,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:34:02,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546973938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:34:02,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:34:02,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:34:02,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104725302] [2023-11-23 21:34:02,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:34:02,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:34:02,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:34:02,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:34:02,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:34:02,850 INFO L87 Difference]: Start difference. First operand has 179 states, 124 states have (on average 1.5403225806451613) internal successors, (191), 125 states have internal predecessors, (191), 52 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) Second operand has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 2 states have call successors, (52) [2023-11-23 21:34:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:34:02,924 INFO L93 Difference]: Finished difference Result 355 states and 640 transitions. [2023-11-23 21:34:02,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:34:02,927 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 2 states have call successors, (52) Word has length 345 [2023-11-23 21:34:02,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:34:02,938 INFO L225 Difference]: With dead ends: 355 [2023-11-23 21:34:02,938 INFO L226 Difference]: Without dead ends: 177 [2023-11-23 21:34:02,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:34:02,948 INFO L413 NwaCegarLoop]: 287 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, 287 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:34:02,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 287 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:34:02,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-23 21:34:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2023-11-23 21:34:03,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 123 states have (on average 1.5121951219512195) internal successors, (186), 123 states have internal predecessors, (186), 52 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 21:34:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 290 transitions. [2023-11-23 21:34:03,034 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 290 transitions. Word has length 345 [2023-11-23 21:34:03,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:34:03,035 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 290 transitions. [2023-11-23 21:34:03,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 2 states have call successors, (52) [2023-11-23 21:34:03,036 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 290 transitions. [2023-11-23 21:34:03,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2023-11-23 21:34:03,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:34:03,046 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:34:03,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:34:03,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 21:34:03,273 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:34:03,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:34:03,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1054537455, now seen corresponding path program 1 times [2023-11-23 21:34:03,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:34:03,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424945973] [2023-11-23 21:34:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:03,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:34:03,417 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:34:03,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045259719] [2023-11-23 21:34:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:03,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:03,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:34:03,420 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:34:03,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:34:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:34:03,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:34:03,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:34:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5304 trivial. 0 not checked. [2023-11-23 21:34:03,882 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:34:03,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:34:03,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424945973] [2023-11-23 21:34:03,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:34:03,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045259719] [2023-11-23 21:34:03,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045259719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:34:03,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:34:03,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:34:03,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239783868] [2023-11-23 21:34:03,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:34:03,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:34:03,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:34:03,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:34:03,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:34:03,889 INFO L87 Difference]: Start difference. First operand 177 states and 290 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) [2023-11-23 21:34:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:34:04,189 INFO L93 Difference]: Finished difference Result 524 states and 859 transitions. [2023-11-23 21:34:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:34:04,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) Word has length 345 [2023-11-23 21:34:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:34:04,212 INFO L225 Difference]: With dead ends: 524 [2023-11-23 21:34:04,213 INFO L226 Difference]: Without dead ends: 348 [2023-11-23 21:34:04,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:34:04,222 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 271 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:34:04,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 745 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:34:04,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-23 21:34:04,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 346. [2023-11-23 21:34:04,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 239 states have (on average 1.4853556485355648) internal successors, (355), 239 states have internal predecessors, (355), 104 states have call successors, (104), 2 states have call predecessors, (104), 2 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2023-11-23 21:34:04,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 563 transitions. [2023-11-23 21:34:04,349 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 563 transitions. Word has length 345 [2023-11-23 21:34:04,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:34:04,351 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 563 transitions. [2023-11-23 21:34:04,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) [2023-11-23 21:34:04,352 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 563 transitions. [2023-11-23 21:34:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2023-11-23 21:34:04,363 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:34:04,363 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:34:04,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:34:04,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-23 21:34:04,584 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:34:04,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:34:04,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1302683949, now seen corresponding path program 1 times [2023-11-23 21:34:04,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:34:04,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437441297] [2023-11-23 21:34:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:04,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:34:04,722 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:34:04,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436871992] [2023-11-23 21:34:04,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:04,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:04,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:34:04,732 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:34:04,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:34:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:34:05,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:34:05,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:34:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5304 trivial. 0 not checked. [2023-11-23 21:34:05,155 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:34:05,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:34:05,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437441297] [2023-11-23 21:34:05,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:34:05,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436871992] [2023-11-23 21:34:05,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436871992] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:34:05,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:34:05,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:34:05,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200744143] [2023-11-23 21:34:05,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:34:05,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:34:05,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:34:05,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:34:05,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:34:05,160 INFO L87 Difference]: Start difference. First operand 346 states and 563 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) [2023-11-23 21:34:05,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:34:05,297 INFO L93 Difference]: Finished difference Result 1030 states and 1676 transitions. [2023-11-23 21:34:05,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:34:05,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) Word has length 345 [2023-11-23 21:34:05,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:34:05,310 INFO L225 Difference]: With dead ends: 1030 [2023-11-23 21:34:05,311 INFO L226 Difference]: Without dead ends: 685 [2023-11-23 21:34:05,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:34:05,317 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 265 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:34:05,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 802 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:34:05,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2023-11-23 21:34:05,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 405. [2023-11-23 21:34:05,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 298 states have (on average 1.5134228187919463) internal successors, (451), 298 states have internal predecessors, (451), 104 states have call successors, (104), 2 states have call predecessors, (104), 2 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2023-11-23 21:34:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 659 transitions. [2023-11-23 21:34:05,404 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 659 transitions. Word has length 345 [2023-11-23 21:34:05,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:34:05,409 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 659 transitions. [2023-11-23 21:34:05,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) [2023-11-23 21:34:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 659 transitions. [2023-11-23 21:34:05,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2023-11-23 21:34:05,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:34:05,415 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:34:05,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:34:05,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:05,633 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:34:05,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:34:05,633 INFO L85 PathProgramCache]: Analyzing trace with hash -117679101, now seen corresponding path program 1 times [2023-11-23 21:34:05,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:34:05,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007052414] [2023-11-23 21:34:05,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:05,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:34:05,775 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:34:05,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733010635] [2023-11-23 21:34:05,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:05,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:05,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:34:05,777 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:34:05,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:34:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:34:06,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:34:06,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:34:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5304 trivial. 0 not checked. [2023-11-23 21:34:06,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:34:06,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:34:06,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007052414] [2023-11-23 21:34:06,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:34:06,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733010635] [2023-11-23 21:34:06,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733010635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:34:06,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:34:06,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:34:06,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72486953] [2023-11-23 21:34:06,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:34:06,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:34:06,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:34:06,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:34:06,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:34:06,220 INFO L87 Difference]: Start difference. First operand 405 states and 659 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) [2023-11-23 21:34:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:34:06,336 INFO L93 Difference]: Finished difference Result 812 states and 1320 transitions. [2023-11-23 21:34:06,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:34:06,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) Word has length 346 [2023-11-23 21:34:06,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:34:06,342 INFO L225 Difference]: With dead ends: 812 [2023-11-23 21:34:06,342 INFO L226 Difference]: Without dead ends: 408 [2023-11-23 21:34:06,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:34:06,351 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 246 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:34:06,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 615 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:34:06,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-11-23 21:34:06,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 406. [2023-11-23 21:34:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 299 states have (on average 1.4882943143812708) internal successors, (445), 299 states have internal predecessors, (445), 104 states have call successors, (104), 2 states have call predecessors, (104), 2 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2023-11-23 21:34:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 653 transitions. [2023-11-23 21:34:06,399 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 653 transitions. Word has length 346 [2023-11-23 21:34:06,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:34:06,403 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 653 transitions. [2023-11-23 21:34:06,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) [2023-11-23 21:34:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 653 transitions. [2023-11-23 21:34:06,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2023-11-23 21:34:06,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:34:06,410 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:34:06,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:34:06,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:06,625 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:34:06,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:34:06,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1517291885, now seen corresponding path program 1 times [2023-11-23 21:34:06,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:34:06,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641374254] [2023-11-23 21:34:06,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:06,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:34:06,696 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:34:06,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558383086] [2023-11-23 21:34:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:06,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:06,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:34:06,698 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:34:06,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:34:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:34:07,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:34:07,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:34:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 1143 proven. 135 refuted. 0 times theorem prover too weak. 4026 trivial. 0 not checked. [2023-11-23 21:34:07,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:34:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 5151 trivial. 0 not checked. [2023-11-23 21:34:08,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:34:08,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641374254] [2023-11-23 21:34:08,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:34:08,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558383086] [2023-11-23 21:34:08,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558383086] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:34:08,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:34:08,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-23 21:34:08,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768295404] [2023-11-23 21:34:08,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:34:08,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:34:08,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:34:08,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:34:08,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:34:08,325 INFO L87 Difference]: Start difference. First operand 406 states and 653 transitions. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 3 states have call successors, (97), 2 states have call predecessors, (97), 4 states have return successors, (98), 3 states have call predecessors, (98), 3 states have call successors, (98) [2023-11-23 21:34:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:34:11,328 INFO L93 Difference]: Finished difference Result 2243 states and 3553 transitions. [2023-11-23 21:34:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-23 21:34:11,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 3 states have call successors, (97), 2 states have call predecessors, (97), 4 states have return successors, (98), 3 states have call predecessors, (98), 3 states have call successors, (98) Word has length 347 [2023-11-23 21:34:11,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:34:11,347 INFO L225 Difference]: With dead ends: 2243 [2023-11-23 21:34:11,347 INFO L226 Difference]: Without dead ends: 1838 [2023-11-23 21:34:11,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=441, Invalid=1199, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 21:34:11,352 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 953 mSDsluCounter, 1943 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 2488 SdHoareTripleChecker+Invalid, 2153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:34:11,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 2488 Invalid, 2153 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [360 Valid, 1793 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-23 21:34:11,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2023-11-23 21:34:11,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 531. [2023-11-23 21:34:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 422 states have (on average 1.509478672985782) internal successors, (637), 422 states have internal predecessors, (637), 104 states have call successors, (104), 4 states have call predecessors, (104), 4 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2023-11-23 21:34:11,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 845 transitions. [2023-11-23 21:34:11,651 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 845 transitions. Word has length 347 [2023-11-23 21:34:11,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:34:11,653 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 845 transitions. [2023-11-23 21:34:11,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 3 states have call successors, (97), 2 states have call predecessors, (97), 4 states have return successors, (98), 3 states have call predecessors, (98), 3 states have call successors, (98) [2023-11-23 21:34:11,653 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 845 transitions. [2023-11-23 21:34:11,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2023-11-23 21:34:11,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:34:11,659 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:34:11,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:34:11,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:11,885 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:34:11,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:34:11,885 INFO L85 PathProgramCache]: Analyzing trace with hash 857760363, now seen corresponding path program 1 times [2023-11-23 21:34:11,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:34:11,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021006499] [2023-11-23 21:34:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:11,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:34:11,970 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:34:11,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859130470] [2023-11-23 21:34:11,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:11,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:11,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:34:11,972 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:34:12,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:34:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:34:12,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:34:12,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:34:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 1891 proven. 33 refuted. 0 times theorem prover too weak. 3380 trivial. 0 not checked. [2023-11-23 21:34:12,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:34:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 120 proven. 33 refuted. 0 times theorem prover too weak. 5151 trivial. 0 not checked. [2023-11-23 21:34:12,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:34:12,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021006499] [2023-11-23 21:34:12,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:34:12,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859130470] [2023-11-23 21:34:12,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859130470] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:34:12,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:34:12,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-23 21:34:12,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242210283] [2023-11-23 21:34:12,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:34:12,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:34:12,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:34:12,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:34:12,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:34:12,798 INFO L87 Difference]: Start difference. First operand 531 states and 845 transitions. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2023-11-23 21:34:13,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:34:13,189 INFO L93 Difference]: Finished difference Result 1073 states and 1699 transitions. [2023-11-23 21:34:13,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:34:13,190 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) Word has length 347 [2023-11-23 21:34:13,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:34:13,196 INFO L225 Difference]: With dead ends: 1073 [2023-11-23 21:34:13,196 INFO L226 Difference]: Without dead ends: 543 [2023-11-23 21:34:13,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 686 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:34:13,199 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 204 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:34:13,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 585 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:34:13,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-11-23 21:34:13,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 539. [2023-11-23 21:34:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 428 states have (on average 1.4929906542056075) internal successors, (639), 428 states have internal predecessors, (639), 104 states have call successors, (104), 6 states have call predecessors, (104), 6 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2023-11-23 21:34:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 847 transitions. [2023-11-23 21:34:13,270 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 847 transitions. Word has length 347 [2023-11-23 21:34:13,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:34:13,272 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 847 transitions. [2023-11-23 21:34:13,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2023-11-23 21:34:13,273 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 847 transitions. [2023-11-23 21:34:13,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2023-11-23 21:34:13,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:34:13,276 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:34:13,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:34:13,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:13,492 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:34:13,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:34:13,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1847779760, now seen corresponding path program 1 times [2023-11-23 21:34:13,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:34:13,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707652140] [2023-11-23 21:34:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:13,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:34:13,562 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:34:13,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524745218] [2023-11-23 21:34:13,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:13,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:13,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:34:13,564 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:34:13,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:34:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:34:13,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 21:34:13,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:34:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5304 trivial. 0 not checked. [2023-11-23 21:34:14,466 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:34:14,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:34:14,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707652140] [2023-11-23 21:34:14,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:34:14,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524745218] [2023-11-23 21:34:14,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524745218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:34:14,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:34:14,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:34:14,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457231213] [2023-11-23 21:34:14,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:34:14,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:34:14,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:34:14,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:34:14,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:34:14,471 INFO L87 Difference]: Start difference. First operand 539 states and 847 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) [2023-11-23 21:34:15,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:34:15,281 INFO L93 Difference]: Finished difference Result 2194 states and 3431 transitions. [2023-11-23 21:34:15,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:34:15,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) Word has length 349 [2023-11-23 21:34:15,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:34:15,296 INFO L225 Difference]: With dead ends: 2194 [2023-11-23 21:34:15,296 INFO L226 Difference]: Without dead ends: 1656 [2023-11-23 21:34:15,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:34:15,300 INFO L413 NwaCegarLoop]: 772 mSDtfsCounter, 737 mSDsluCounter, 2106 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 2878 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:34:15,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 2878 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:34:15,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2023-11-23 21:34:15,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 683. [2023-11-23 21:34:15,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 517 states have (on average 1.4661508704061896) internal successors, (758), 517 states have internal predecessors, (758), 156 states have call successors, (156), 9 states have call predecessors, (156), 9 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2023-11-23 21:34:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1070 transitions. [2023-11-23 21:34:15,482 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1070 transitions. Word has length 349 [2023-11-23 21:34:15,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:34:15,483 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 1070 transitions. [2023-11-23 21:34:15,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) [2023-11-23 21:34:15,484 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1070 transitions. [2023-11-23 21:34:15,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2023-11-23 21:34:15,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:34:15,487 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:34:15,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:34:15,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:15,712 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:34:15,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:34:15,712 INFO L85 PathProgramCache]: Analyzing trace with hash -960397620, now seen corresponding path program 1 times [2023-11-23 21:34:15,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:34:15,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288548594] [2023-11-23 21:34:15,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:15,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:34:15,790 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:34:15,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634623520] [2023-11-23 21:34:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:15,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:15,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:34:15,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:34:15,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:34:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:34:16,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 21:34:16,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:34:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2585 proven. 123 refuted. 0 times theorem prover too weak. 2596 trivial. 0 not checked. [2023-11-23 21:34:17,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:34:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 318 proven. 132 refuted. 0 times theorem prover too weak. 4854 trivial. 0 not checked. [2023-11-23 21:34:18,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:34:18,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288548594] [2023-11-23 21:34:18,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:34:18,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634623520] [2023-11-23 21:34:18,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634623520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:34:18,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:34:18,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2023-11-23 21:34:18,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505495175] [2023-11-23 21:34:18,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:34:18,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-23 21:34:18,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:34:18,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-23 21:34:18,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2023-11-23 21:34:18,618 INFO L87 Difference]: Start difference. First operand 683 states and 1070 transitions. Second operand has 26 states, 26 states have (on average 5.961538461538462) internal successors, (155), 26 states have internal predecessors, (155), 8 states have call successors, (104), 5 states have call predecessors, (104), 10 states have return successors, (104), 8 states have call predecessors, (104), 8 states have call successors, (104) [2023-11-23 21:34:25,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:34:25,972 INFO L93 Difference]: Finished difference Result 3194 states and 4845 transitions. [2023-11-23 21:34:25,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-23 21:34:25,973 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.961538461538462) internal successors, (155), 26 states have internal predecessors, (155), 8 states have call successors, (104), 5 states have call predecessors, (104), 10 states have return successors, (104), 8 states have call predecessors, (104), 8 states have call successors, (104) Word has length 349 [2023-11-23 21:34:25,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:34:25,993 INFO L225 Difference]: With dead ends: 3194 [2023-11-23 21:34:25,994 INFO L226 Difference]: Without dead ends: 2606 [2023-11-23 21:34:25,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 693 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3013 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2003, Invalid=6553, Unknown=0, NotChecked=0, Total=8556 [2023-11-23 21:34:26,001 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 4466 mSDsluCounter, 4715 mSDsCounter, 0 mSdLazyCounter, 3529 mSolverCounterSat, 1044 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4536 SdHoareTripleChecker+Valid, 5276 SdHoareTripleChecker+Invalid, 4573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1044 IncrementalHoareTripleChecker+Valid, 3529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:34:26,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4536 Valid, 5276 Invalid, 4573 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1044 Valid, 3529 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-23 21:34:26,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2023-11-23 21:34:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1643. [2023-11-23 21:34:26,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1248 states have (on average 1.4270833333333333) internal successors, (1781), 1252 states have internal predecessors, (1781), 356 states have call successors, (356), 38 states have call predecessors, (356), 38 states have return successors, (356), 352 states have call predecessors, (356), 356 states have call successors, (356) [2023-11-23 21:34:26,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2493 transitions. [2023-11-23 21:34:26,282 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2493 transitions. Word has length 349 [2023-11-23 21:34:26,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:34:26,283 INFO L495 AbstractCegarLoop]: Abstraction has 1643 states and 2493 transitions. [2023-11-23 21:34:26,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.961538461538462) internal successors, (155), 26 states have internal predecessors, (155), 8 states have call successors, (104), 5 states have call predecessors, (104), 10 states have return successors, (104), 8 states have call predecessors, (104), 8 states have call successors, (104) [2023-11-23 21:34:26,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2493 transitions. [2023-11-23 21:34:26,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2023-11-23 21:34:26,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:34:26,288 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:34:26,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:34:26,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:26,497 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:34:26,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:34:26,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1643256141, now seen corresponding path program 1 times [2023-11-23 21:34:26,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:34:26,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002816646] [2023-11-23 21:34:26,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:26,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:34:26,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:34:26,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161404380] [2023-11-23 21:34:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:26,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:26,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:34:26,592 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:34:26,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:34:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:34:26,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:34:26,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:34:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5304 trivial. 0 not checked. [2023-11-23 21:34:28,036 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:34:28,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:34:28,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002816646] [2023-11-23 21:34:28,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:34:28,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161404380] [2023-11-23 21:34:28,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161404380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:34:28,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:34:28,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:34:28,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370157873] [2023-11-23 21:34:28,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:34:28,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:34:28,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:34:28,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:34:28,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:34:28,040 INFO L87 Difference]: Start difference. First operand 1643 states and 2493 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) [2023-11-23 21:34:28,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:34:28,682 INFO L93 Difference]: Finished difference Result 3367 states and 5120 transitions. [2023-11-23 21:34:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:34:28,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) Word has length 349 [2023-11-23 21:34:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:34:28,698 INFO L225 Difference]: With dead ends: 3367 [2023-11-23 21:34:28,699 INFO L226 Difference]: Without dead ends: 1879 [2023-11-23 21:34:28,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:34:28,705 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 267 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:34:28,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 1010 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:34:28,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2023-11-23 21:34:28,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1643. [2023-11-23 21:34:28,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1248 states have (on average 1.4246794871794872) internal successors, (1778), 1252 states have internal predecessors, (1778), 356 states have call successors, (356), 38 states have call predecessors, (356), 38 states have return successors, (356), 352 states have call predecessors, (356), 356 states have call successors, (356) [2023-11-23 21:34:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2490 transitions. [2023-11-23 21:34:28,992 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2490 transitions. Word has length 349 [2023-11-23 21:34:28,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:34:28,992 INFO L495 AbstractCegarLoop]: Abstraction has 1643 states and 2490 transitions. [2023-11-23 21:34:28,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) [2023-11-23 21:34:28,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2490 transitions. [2023-11-23 21:34:28,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2023-11-23 21:34:28,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:34:28,996 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:34:29,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:34:29,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-23 21:34:29,217 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:34:29,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:34:29,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1622351857, now seen corresponding path program 1 times [2023-11-23 21:34:29,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:34:29,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440045837] [2023-11-23 21:34:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:29,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:34:29,281 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:34:29,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944355453] [2023-11-23 21:34:29,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:29,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:29,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:34:29,283 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:34:29,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:34:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:34:29,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-23 21:34:29,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:34:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2344 proven. 249 refuted. 0 times theorem prover too weak. 2711 trivial. 0 not checked. [2023-11-23 21:34:36,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:34:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 51 proven. 252 refuted. 0 times theorem prover too weak. 5001 trivial. 0 not checked. [2023-11-23 21:34:38,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:34:38,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440045837] [2023-11-23 21:34:38,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:34:38,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944355453] [2023-11-23 21:34:38,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944355453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:34:38,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:34:38,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-11-23 21:34:38,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095630415] [2023-11-23 21:34:38,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:34:38,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 21:34:38,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:34:38,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 21:34:38,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:34:38,072 INFO L87 Difference]: Start difference. First operand 1643 states and 2490 transitions. Second operand has 24 states, 23 states have (on average 7.478260869565218) internal successors, (172), 24 states have internal predecessors, (172), 6 states have call successors, (104), 4 states have call predecessors, (104), 8 states have return successors, (104), 6 states have call predecessors, (104), 6 states have call successors, (104) [2023-11-23 21:34:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:34:44,613 INFO L93 Difference]: Finished difference Result 7704 states and 11700 transitions. [2023-11-23 21:34:44,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-23 21:34:44,614 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 7.478260869565218) internal successors, (172), 24 states have internal predecessors, (172), 6 states have call successors, (104), 4 states have call predecessors, (104), 8 states have return successors, (104), 6 states have call predecessors, (104), 6 states have call successors, (104) Word has length 349 [2023-11-23 21:34:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:34:44,651 INFO L225 Difference]: With dead ends: 7704 [2023-11-23 21:34:44,651 INFO L226 Difference]: Without dead ends: 6216 [2023-11-23 21:34:44,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=988, Invalid=2918, Unknown=0, NotChecked=0, Total=3906 [2023-11-23 21:34:44,660 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 6789 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 923 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6806 SdHoareTripleChecker+Valid, 2412 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 923 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:34:44,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6806 Valid, 2412 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [923 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-23 21:34:44,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6216 states. [2023-11-23 21:34:45,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6216 to 3262. [2023-11-23 21:34:45,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 2696 states have (on average 1.4510385756676558) internal successors, (3912), 2701 states have internal predecessors, (3912), 500 states have call successors, (500), 65 states have call predecessors, (500), 65 states have return successors, (500), 495 states have call predecessors, (500), 500 states have call successors, (500) [2023-11-23 21:34:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 4912 transitions. [2023-11-23 21:34:45,295 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 4912 transitions. Word has length 349 [2023-11-23 21:34:45,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:34:45,296 INFO L495 AbstractCegarLoop]: Abstraction has 3262 states and 4912 transitions. [2023-11-23 21:34:45,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 7.478260869565218) internal successors, (172), 24 states have internal predecessors, (172), 6 states have call successors, (104), 4 states have call predecessors, (104), 8 states have return successors, (104), 6 states have call predecessors, (104), 6 states have call successors, (104) [2023-11-23 21:34:45,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 4912 transitions. [2023-11-23 21:34:45,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2023-11-23 21:34:45,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:34:45,302 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:34:45,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:34:45,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:34:45,512 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:34:45,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:34:45,512 INFO L85 PathProgramCache]: Analyzing trace with hash -920751983, now seen corresponding path program 1 times [2023-11-23 21:34:45,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:34:45,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363217281] [2023-11-23 21:34:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:45,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:34:45,586 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:34:45,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327519619] [2023-11-23 21:34:45,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:34:45,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:34:45,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:34:45,588 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:34:45,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b370d6b-52f6-42a7-81e5-0cf13740956b/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 21:34:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:34:46,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:34:46,062 INFO L285 TraceCheckSpWp]: Computing forward predicates...