./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme --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 d7e06ec6fa537fe85bfdff5997d89760f89bf3ab66b37451471516c2ec0f2efb --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:49:03,422 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:49:03,488 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:49:03,494 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:49:03,495 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:49:03,521 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:49:03,522 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:49:03,523 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:49:03,524 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:49:03,525 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:49:03,525 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:49:03,526 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:49:03,527 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:49:03,528 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:49:03,528 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:49:03,529 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:49:03,530 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:49:03,530 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:49:03,531 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:49:03,531 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:49:03,532 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:49:03,533 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:49:03,533 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:49:03,534 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:49:03,534 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:49:03,535 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:49:03,535 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:49:03,536 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:49:03,536 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:49:03,537 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:49:03,537 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:49:03,538 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:03,538 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:49:03,538 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:49:03,539 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:49:03,539 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:49:03,539 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:49:03,540 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:49:03,540 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:49:03,540 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:49:03,541 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:49:03,541 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:49:03,542 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_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7e06ec6fa537fe85bfdff5997d89760f89bf3ab66b37451471516c2ec0f2efb [2023-11-26 10:49:03,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:49:03,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:49:03,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:49:03,815 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:49:03,816 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:49:03,817 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i [2023-11-26 10:49:06,888 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:49:07,218 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:49:07,218 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i [2023-11-26 10:49:07,245 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/data/deaf17b9a/c0a6fd943bc543ecb75de39de68c196c/FLAG4824468e7 [2023-11-26 10:49:07,259 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/data/deaf17b9a/c0a6fd943bc543ecb75de39de68c196c [2023-11-26 10:49:07,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:49:07,265 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:49:07,266 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:07,266 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:49:07,271 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:49:07,272 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,273 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4751908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07, skipping insertion in model container [2023-11-26 10:49:07,273 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,320 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:49:07,465 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_1df487c9-8b14-4564-a483-072b83cb34e7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i[916,929] [2023-11-26 10:49:07,627 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:07,645 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:49:07,664 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_1df487c9-8b14-4564-a483-072b83cb34e7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i[916,929] [2023-11-26 10:49:07,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:07,774 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:49:07,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07 WrapperNode [2023-11-26 10:49:07,774 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:07,776 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:07,776 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:49:07,776 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:49:07,789 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,811 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,883 INFO L138 Inliner]: procedures = 26, calls = 100, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 662 [2023-11-26 10:49:07,883 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:07,884 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:49:07,884 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:49:07,885 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:49:07,897 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,897 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,905 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,960 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 10:49:07,960 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,961 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:07,995 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:08,014 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:08,037 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:08,043 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:08,062 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:49:08,064 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:49:08,064 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:49:08,065 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:49:08,066 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (1/1) ... [2023-11-26 10:49:08,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:08,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:08,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:49:08,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:49:08,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:49:08,157 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:49:08,157 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:49:08,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:49:08,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:49:08,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:49:08,291 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:49:08,293 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:49:09,205 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:49:09,274 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:49:09,274 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:49:09,275 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:09 BoogieIcfgContainer [2023-11-26 10:49:09,275 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:49:09,279 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:49:09,280 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:49:09,283 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:49:09,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:49:07" (1/3) ... [2023-11-26 10:49:09,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd355d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:09, skipping insertion in model container [2023-11-26 10:49:09,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:07" (2/3) ... [2023-11-26 10:49:09,287 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd355d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:09, skipping insertion in model container [2023-11-26 10:49:09,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:09" (3/3) ... [2023-11-26 10:49:09,289 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-17.i [2023-11-26 10:49:09,312 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:49:09,312 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:49:09,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:49:09,392 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;@27c3043c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:49:09,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:49:09,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 256 states, 166 states have (on average 1.608433734939759) internal successors, (267), 167 states have internal predecessors, (267), 87 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-26 10:49:09,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2023-11-26 10:49:09,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:09,454 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:09,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:09,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:09,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1602918673, now seen corresponding path program 1 times [2023-11-26 10:49:09,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:09,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016972817] [2023-11-26 10:49:09,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:09,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:09,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:09,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016972817] [2023-11-26 10:49:09,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:49:09,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153054410] [2023-11-26 10:49:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:10,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:10,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:10,017 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:10,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:49:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:10,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:49:10,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 14792 trivial. 0 not checked. [2023-11-26 10:49:10,602 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:10,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153054410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:10,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:10,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:49:10,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083906761] [2023-11-26 10:49:10,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:10,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:49:10,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:49:10,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:49:10,667 INFO L87 Difference]: Start difference. First operand has 256 states, 166 states have (on average 1.608433734939759) internal successors, (267), 167 states have internal predecessors, (267), 87 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) Second operand has 2 states, 2 states have (on average 53.0) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 2 states have call successors, (87) [2023-11-26 10:49:10,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:10,817 INFO L93 Difference]: Finished difference Result 507 states and 963 transitions. [2023-11-26 10:49:10,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:49:10,820 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 53.0) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 2 states have call successors, (87) Word has length 536 [2023-11-26 10:49:10,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:10,838 INFO L225 Difference]: With dead ends: 507 [2023-11-26 10:49:10,838 INFO L226 Difference]: Without dead ends: 252 [2023-11-26 10:49:10,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:49:10,853 INFO L413 NwaCegarLoop]: 428 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, 428 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 [2023-11-26 10:49:10,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 428 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:10,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-26 10:49:10,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2023-11-26 10:49:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 163 states have (on average 1.5766871165644172) internal successors, (257), 163 states have internal predecessors, (257), 87 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-26 10:49:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 431 transitions. [2023-11-26 10:49:10,960 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 431 transitions. Word has length 536 [2023-11-26 10:49:10,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:10,961 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 431 transitions. [2023-11-26 10:49:10,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 53.0) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 2 states have call successors, (87) [2023-11-26 10:49:10,962 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 431 transitions. [2023-11-26 10:49:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2023-11-26 10:49:10,978 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:10,978 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:10,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:11,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:11,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:11,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:11,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1267846554, now seen corresponding path program 1 times [2023-11-26 10:49:11,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:11,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480204256] [2023-11-26 10:49:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:11,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:11,321 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:11,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392006163] [2023-11-26 10:49:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:11,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:11,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:11,323 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:11,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:49:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:11,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:49:11,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 7568 proven. 129 refuted. 0 times theorem prover too weak. 7267 trivial. 0 not checked. [2023-11-26 10:49:12,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 129 proven. 129 refuted. 0 times theorem prover too weak. 14706 trivial. 0 not checked. [2023-11-26 10:49:12,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:12,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480204256] [2023-11-26 10:49:12,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:12,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392006163] [2023-11-26 10:49:12,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392006163] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:12,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:12,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 10:49:12,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663350105] [2023-11-26 10:49:12,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:12,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:49:12,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:12,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:49:12,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:49:12,950 INFO L87 Difference]: Start difference. First operand 252 states and 431 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 2 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 2 states have call predecessors, (131), 2 states have call successors, (131) [2023-11-26 10:49:13,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:13,611 INFO L93 Difference]: Finished difference Result 504 states and 854 transitions. [2023-11-26 10:49:13,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:49:13,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 2 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 2 states have call predecessors, (131), 2 states have call successors, (131) Word has length 536 [2023-11-26 10:49:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:13,619 INFO L225 Difference]: With dead ends: 504 [2023-11-26 10:49:13,619 INFO L226 Difference]: Without dead ends: 253 [2023-11-26 10:49:13,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1074 GetRequests, 1064 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:49:13,622 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 232 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:13,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 775 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:49:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-11-26 10:49:13,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2023-11-26 10:49:13,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 159 states have (on average 1.528301886792453) internal successors, (243), 159 states have internal predecessors, (243), 87 states have call successors, (87), 2 states have call predecessors, (87), 2 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-26 10:49:13,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 417 transitions. [2023-11-26 10:49:13,681 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 417 transitions. Word has length 536 [2023-11-26 10:49:13,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:13,684 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 417 transitions. [2023-11-26 10:49:13,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 2 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 2 states have call predecessors, (131), 2 states have call successors, (131) [2023-11-26 10:49:13,685 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 417 transitions. [2023-11-26 10:49:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2023-11-26 10:49:13,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:13,700 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:13,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:13,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:13,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:13,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:13,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1486701272, now seen corresponding path program 1 times [2023-11-26 10:49:13,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:13,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814571623] [2023-11-26 10:49:13,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:13,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:14,016 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:14,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490951202] [2023-11-26 10:49:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:14,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:14,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:14,018 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:14,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:49:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:14,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 10:49:14,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 2984 proven. 459 refuted. 0 times theorem prover too weak. 11521 trivial. 0 not checked. [2023-11-26 10:49:17,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 51 proven. 462 refuted. 0 times theorem prover too weak. 14451 trivial. 0 not checked. [2023-11-26 10:49:19,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:19,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814571623] [2023-11-26 10:49:19,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:19,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490951202] [2023-11-26 10:49:19,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490951202] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:19,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:19,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-26 10:49:19,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794975997] [2023-11-26 10:49:19,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:19,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 10:49:19,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:19,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 10:49:19,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:49:19,795 INFO L87 Difference]: Start difference. First operand 249 states and 417 transitions. Second operand has 18 states, 18 states have (on average 10.38888888888889) internal successors, (187), 18 states have internal predecessors, (187), 6 states have call successors, (174), 4 states have call predecessors, (174), 8 states have return successors, (174), 6 states have call predecessors, (174), 6 states have call successors, (174) [2023-11-26 10:49:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:22,632 INFO L93 Difference]: Finished difference Result 1096 states and 1784 transitions. [2023-11-26 10:49:22,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-26 10:49:22,633 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.38888888888889) internal successors, (187), 18 states have internal predecessors, (187), 6 states have call successors, (174), 4 states have call predecessors, (174), 8 states have return successors, (174), 6 states have call predecessors, (174), 6 states have call successors, (174) Word has length 536 [2023-11-26 10:49:22,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:22,649 INFO L225 Difference]: With dead ends: 1096 [2023-11-26 10:49:22,649 INFO L226 Difference]: Without dead ends: 848 [2023-11-26 10:49:22,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1098 GetRequests, 1057 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=523, Invalid=1199, Unknown=0, NotChecked=0, Total=1722 [2023-11-26 10:49:22,655 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 1389 mSDsluCounter, 2411 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 2742 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:22,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1407 Valid, 2742 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-26 10:49:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2023-11-26 10:49:22,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 786. [2023-11-26 10:49:22,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 553 states have (on average 1.5298372513562386) internal successors, (846), 558 states have internal predecessors, (846), 218 states have call successors, (218), 14 states have call predecessors, (218), 14 states have return successors, (218), 213 states have call predecessors, (218), 218 states have call successors, (218) [2023-11-26 10:49:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1282 transitions. [2023-11-26 10:49:22,835 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1282 transitions. Word has length 536 [2023-11-26 10:49:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:22,837 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 1282 transitions. [2023-11-26 10:49:22,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.38888888888889) internal successors, (187), 18 states have internal predecessors, (187), 6 states have call successors, (174), 4 states have call predecessors, (174), 8 states have return successors, (174), 6 states have call predecessors, (174), 6 states have call successors, (174) [2023-11-26 10:49:22,838 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1282 transitions. [2023-11-26 10:49:22,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2023-11-26 10:49:22,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:22,844 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:22,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:23,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:23,054 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:23,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:23,055 INFO L85 PathProgramCache]: Analyzing trace with hash 785636694, now seen corresponding path program 1 times [2023-11-26 10:49:23,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:23,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114935528] [2023-11-26 10:49:23,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:23,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:23,133 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:23,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154804921] [2023-11-26 10:49:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:23,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:23,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:23,135 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:23,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:49:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:23,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 10:49:23,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-26 10:49:25,239 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:25,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:25,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114935528] [2023-11-26 10:49:25,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:25,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154804921] [2023-11-26 10:49:25,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154804921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:25,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:25,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:49:25,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652587567] [2023-11-26 10:49:25,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:25,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:49:25,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:25,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:49:25,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:49:25,245 INFO L87 Difference]: Start difference. First operand 786 states and 1282 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-26 10:49:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:25,770 INFO L93 Difference]: Finished difference Result 1919 states and 3126 transitions. [2023-11-26 10:49:25,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:49:25,771 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) Word has length 536 [2023-11-26 10:49:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:25,782 INFO L225 Difference]: With dead ends: 1919 [2023-11-26 10:49:25,783 INFO L226 Difference]: Without dead ends: 1146 [2023-11-26 10:49:25,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:49:25,787 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 475 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1831 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:25,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 1831 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:49:25,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2023-11-26 10:49:25,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1052. [2023-11-26 10:49:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 736 states have (on average 1.5421195652173914) internal successors, (1135), 740 states have internal predecessors, (1135), 297 states have call successors, (297), 18 states have call predecessors, (297), 18 states have return successors, (297), 293 states have call predecessors, (297), 297 states have call successors, (297) [2023-11-26 10:49:26,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1729 transitions. [2023-11-26 10:49:26,011 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1729 transitions. Word has length 536 [2023-11-26 10:49:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:26,013 INFO L495 AbstractCegarLoop]: Abstraction has 1052 states and 1729 transitions. [2023-11-26 10:49:26,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-26 10:49:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1729 transitions. [2023-11-26 10:49:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2023-11-26 10:49:26,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:26,023 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:26,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 10:49:26,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:26,231 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:26,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:26,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2091483250, now seen corresponding path program 1 times [2023-11-26 10:49:26,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:26,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869227487] [2023-11-26 10:49:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:26,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:26,327 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:26,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056983694] [2023-11-26 10:49:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:26,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:26,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:26,329 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:26,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:49:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:26,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:49:26,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-26 10:49:27,382 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:27,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:27,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869227487] [2023-11-26 10:49:27,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:27,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056983694] [2023-11-26 10:49:27,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056983694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:27,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:27,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:49:27,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337659665] [2023-11-26 10:49:27,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:27,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:49:27,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:27,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:49:27,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:49:27,387 INFO L87 Difference]: Start difference. First operand 1052 states and 1729 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-26 10:49:27,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:27,609 INFO L93 Difference]: Finished difference Result 2777 states and 4582 transitions. [2023-11-26 10:49:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:49:27,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) Word has length 537 [2023-11-26 10:49:27,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:27,629 INFO L225 Difference]: With dead ends: 2777 [2023-11-26 10:49:27,630 INFO L226 Difference]: Without dead ends: 1932 [2023-11-26 10:49:27,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:49:27,635 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 183 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:27,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 1208 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2023-11-26 10:49:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 1912. [2023-11-26 10:49:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1372 states have (on average 1.5495626822157433) internal successors, (2126), 1380 states have internal predecessors, (2126), 507 states have call successors, (507), 32 states have call predecessors, (507), 32 states have return successors, (507), 499 states have call predecessors, (507), 507 states have call successors, (507) [2023-11-26 10:49:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 3140 transitions. [2023-11-26 10:49:28,004 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 3140 transitions. Word has length 537 [2023-11-26 10:49:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:28,005 INFO L495 AbstractCegarLoop]: Abstraction has 1912 states and 3140 transitions. [2023-11-26 10:49:28,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-26 10:49:28,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 3140 transitions. [2023-11-26 10:49:28,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2023-11-26 10:49:28,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:28,013 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:28,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:28,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:28,222 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:28,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:28,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1182048190, now seen corresponding path program 1 times [2023-11-26 10:49:28,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:28,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183560741] [2023-11-26 10:49:28,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:28,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:28,305 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:28,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048469106] [2023-11-26 10:49:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:28,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:28,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:28,307 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:28,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:49:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:28,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:49:28,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-26 10:49:29,430 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:29,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:29,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183560741] [2023-11-26 10:49:29,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:29,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048469106] [2023-11-26 10:49:29,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048469106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:29,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:29,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:49:29,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744820326] [2023-11-26 10:49:29,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:29,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:49:29,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:29,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:49:29,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:49:29,435 INFO L87 Difference]: Start difference. First operand 1912 states and 3140 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-26 10:49:29,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:29,953 INFO L93 Difference]: Finished difference Result 4610 states and 7514 transitions. [2023-11-26 10:49:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:49:29,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) Word has length 538 [2023-11-26 10:49:29,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:29,977 INFO L225 Difference]: With dead ends: 4610 [2023-11-26 10:49:29,977 INFO L226 Difference]: Without dead ends: 3030 [2023-11-26 10:49:29,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:49:29,984 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 390 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:29,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 782 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:49:29,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2023-11-26 10:49:30,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 3024. [2023-11-26 10:49:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 2236 states have (on average 1.542933810375671) internal successors, (3450), 2256 states have internal predecessors, (3450), 731 states have call successors, (731), 56 states have call predecessors, (731), 56 states have return successors, (731), 711 states have call predecessors, (731), 731 states have call successors, (731) [2023-11-26 10:49:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 4912 transitions. [2023-11-26 10:49:30,486 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 4912 transitions. Word has length 538 [2023-11-26 10:49:30,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:30,487 INFO L495 AbstractCegarLoop]: Abstraction has 3024 states and 4912 transitions. [2023-11-26 10:49:30,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-26 10:49:30,488 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 4912 transitions. [2023-11-26 10:49:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2023-11-26 10:49:30,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:30,519 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:30,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:30,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:49:30,732 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:30,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:30,733 INFO L85 PathProgramCache]: Analyzing trace with hash 775930113, now seen corresponding path program 1 times [2023-11-26 10:49:30,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:30,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746045936] [2023-11-26 10:49:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:30,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:30,793 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:30,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053788229] [2023-11-26 10:49:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:30,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:30,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:30,795 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:30,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:49:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:31,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:49:31,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-26 10:49:31,209 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:31,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:31,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746045936] [2023-11-26 10:49:31,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:31,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053788229] [2023-11-26 10:49:31,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053788229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:31,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:31,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:49:31,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118603704] [2023-11-26 10:49:31,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:31,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:49:31,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:31,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:49:31,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:49:31,221 INFO L87 Difference]: Start difference. First operand 3024 states and 4912 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-26 10:49:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:31,731 INFO L93 Difference]: Finished difference Result 8198 states and 13245 transitions. [2023-11-26 10:49:31,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:49:31,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) Word has length 538 [2023-11-26 10:49:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:31,771 INFO L225 Difference]: With dead ends: 8198 [2023-11-26 10:49:31,772 INFO L226 Difference]: Without dead ends: 5506 [2023-11-26 10:49:31,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:49:31,783 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 296 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:31,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 1393 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:49:31,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5506 states. [2023-11-26 10:49:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5506 to 5494. [2023-11-26 10:49:32,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5494 states, 4081 states have (on average 1.5332026464101935) internal successors, (6257), 4125 states have internal predecessors, (6257), 1303 states have call successors, (1303), 109 states have call predecessors, (1303), 109 states have return successors, (1303), 1259 states have call predecessors, (1303), 1303 states have call successors, (1303) [2023-11-26 10:49:32,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5494 states to 5494 states and 8863 transitions. [2023-11-26 10:49:32,557 INFO L78 Accepts]: Start accepts. Automaton has 5494 states and 8863 transitions. Word has length 538 [2023-11-26 10:49:32,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:32,559 INFO L495 AbstractCegarLoop]: Abstraction has 5494 states and 8863 transitions. [2023-11-26 10:49:32,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-26 10:49:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 5494 states and 8863 transitions. [2023-11-26 10:49:32,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2023-11-26 10:49:32,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:32,568 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:32,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:32,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:49:32,777 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:32,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:32,777 INFO L85 PathProgramCache]: Analyzing trace with hash 118015014, now seen corresponding path program 1 times [2023-11-26 10:49:32,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:32,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11360801] [2023-11-26 10:49:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:32,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:32,889 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:32,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243412632] [2023-11-26 10:49:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:32,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:32,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:32,894 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:32,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:49:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:33,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:49:33,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 7496 proven. 144 refuted. 0 times theorem prover too weak. 7324 trivial. 0 not checked. [2023-11-26 10:49:35,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 114 proven. 144 refuted. 0 times theorem prover too weak. 14706 trivial. 0 not checked. [2023-11-26 10:49:36,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:36,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11360801] [2023-11-26 10:49:36,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:36,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243412632] [2023-11-26 10:49:36,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243412632] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:36,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:36,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-26 10:49:36,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99521929] [2023-11-26 10:49:36,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:36,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:49:36,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:36,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:49:36,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:49:36,328 INFO L87 Difference]: Start difference. First operand 5494 states and 8863 transitions. Second operand has 14 states, 13 states have (on average 15.615384615384615) internal successors, (203), 14 states have internal predecessors, (203), 6 states have call successors, (174), 4 states have call predecessors, (174), 5 states have return successors, (174), 4 states have call predecessors, (174), 6 states have call successors, (174) [2023-11-26 10:49:37,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:37,784 INFO L93 Difference]: Finished difference Result 10546 states and 16835 transitions. [2023-11-26 10:49:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:49:37,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 15.615384615384615) internal successors, (203), 14 states have internal predecessors, (203), 6 states have call successors, (174), 4 states have call predecessors, (174), 5 states have return successors, (174), 4 states have call predecessors, (174), 6 states have call successors, (174) Word has length 539 [2023-11-26 10:49:37,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:37,829 INFO L225 Difference]: With dead ends: 10546 [2023-11-26 10:49:37,829 INFO L226 Difference]: Without dead ends: 5746 [2023-11-26 10:49:37,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 1064 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:49:37,848 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 740 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:37,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 1326 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 10:49:37,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5746 states. [2023-11-26 10:49:38,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5746 to 5530. [2023-11-26 10:49:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5530 states, 4108 states have (on average 1.5180136319376825) internal successors, (6236), 4152 states have internal predecessors, (6236), 1303 states have call successors, (1303), 118 states have call predecessors, (1303), 118 states have return successors, (1303), 1259 states have call predecessors, (1303), 1303 states have call successors, (1303) [2023-11-26 10:49:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5530 states to 5530 states and 8842 transitions. [2023-11-26 10:49:38,682 INFO L78 Accepts]: Start accepts. Automaton has 5530 states and 8842 transitions. Word has length 539 [2023-11-26 10:49:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:38,684 INFO L495 AbstractCegarLoop]: Abstraction has 5530 states and 8842 transitions. [2023-11-26 10:49:38,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 15.615384615384615) internal successors, (203), 14 states have internal predecessors, (203), 6 states have call successors, (174), 4 states have call predecessors, (174), 5 states have return successors, (174), 4 states have call predecessors, (174), 6 states have call successors, (174) [2023-11-26 10:49:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 5530 states and 8842 transitions. [2023-11-26 10:49:38,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2023-11-26 10:49:38,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:38,692 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:38,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:38,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 10:49:38,902 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:38,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:38,903 INFO L85 PathProgramCache]: Analyzing trace with hash -715227685, now seen corresponding path program 1 times [2023-11-26 10:49:38,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:38,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221349511] [2023-11-26 10:49:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:38,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:38,979 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:38,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532222358] [2023-11-26 10:49:38,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:38,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:38,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:38,981 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:39,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:49:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:39,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:49:39,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-26 10:49:39,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:39,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:39,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221349511] [2023-11-26 10:49:39,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:39,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532222358] [2023-11-26 10:49:39,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532222358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:39,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:39,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:49:39,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386152132] [2023-11-26 10:49:39,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:39,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:39,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:39,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:39,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:39,515 INFO L87 Difference]: Start difference. First operand 5530 states and 8842 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-26 10:49:40,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:40,351 INFO L93 Difference]: Finished difference Result 14906 states and 23713 transitions. [2023-11-26 10:49:40,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:40,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) Word has length 540 [2023-11-26 10:49:40,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:40,408 INFO L225 Difference]: With dead ends: 14906 [2023-11-26 10:49:40,408 INFO L226 Difference]: Without dead ends: 10074 [2023-11-26 10:49:40,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:40,424 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 210 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:40,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 789 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:49:40,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10074 states. [2023-11-26 10:49:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10074 to 10056. [2023-11-26 10:49:41,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10056 states, 7737 states have (on average 1.527336176812718) internal successors, (11817), 7829 states have internal predecessors, (11817), 2103 states have call successors, (2103), 215 states have call predecessors, (2103), 215 states have return successors, (2103), 2011 states have call predecessors, (2103), 2103 states have call successors, (2103) [2023-11-26 10:49:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10056 states to 10056 states and 16023 transitions. [2023-11-26 10:49:41,731 INFO L78 Accepts]: Start accepts. Automaton has 10056 states and 16023 transitions. Word has length 540 [2023-11-26 10:49:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:41,732 INFO L495 AbstractCegarLoop]: Abstraction has 10056 states and 16023 transitions. [2023-11-26 10:49:41,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-26 10:49:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 10056 states and 16023 transitions. [2023-11-26 10:49:41,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2023-11-26 10:49:41,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:41,743 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:41,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:41,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:41,952 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:41,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:41,952 INFO L85 PathProgramCache]: Analyzing trace with hash 280806987, now seen corresponding path program 1 times [2023-11-26 10:49:41,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:41,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357264951] [2023-11-26 10:49:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:41,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:42,014 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:42,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482052328] [2023-11-26 10:49:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:42,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:42,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:42,016 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:42,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:49:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:42,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 10:49:42,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 7952 proven. 456 refuted. 0 times theorem prover too weak. 6556 trivial. 0 not checked. [2023-11-26 10:49:45,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 192 proven. 321 refuted. 0 times theorem prover too weak. 14451 trivial. 0 not checked. [2023-11-26 10:49:47,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:47,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357264951] [2023-11-26 10:49:47,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:47,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482052328] [2023-11-26 10:49:47,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482052328] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:47,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:47,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2023-11-26 10:49:47,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250838751] [2023-11-26 10:49:47,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:47,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 10:49:47,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:47,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 10:49:47,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2023-11-26 10:49:47,594 INFO L87 Difference]: Start difference. First operand 10056 states and 16023 transitions. Second operand has 22 states, 21 states have (on average 10.428571428571429) internal successors, (219), 20 states have internal predecessors, (219), 8 states have call successors, (174), 5 states have call predecessors, (174), 9 states have return successors, (174), 8 states have call predecessors, (174), 8 states have call successors, (174) [2023-11-26 10:49:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:49,636 INFO L93 Difference]: Finished difference Result 16522 states and 26145 transitions. [2023-11-26 10:49:49,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 10:49:49,637 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 10.428571428571429) internal successors, (219), 20 states have internal predecessors, (219), 8 states have call successors, (174), 5 states have call predecessors, (174), 9 states have return successors, (174), 8 states have call predecessors, (174), 8 states have call successors, (174) Word has length 541 [2023-11-26 10:49:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:49,664 INFO L225 Difference]: With dead ends: 16522 [2023-11-26 10:49:49,665 INFO L226 Difference]: Without dead ends: 7672 [2023-11-26 10:49:49,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1088 GetRequests, 1060 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2023-11-26 10:49:49,692 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 403 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:49,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 1319 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 10:49:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7672 states. [2023-11-26 10:49:50,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7672 to 4122. [2023-11-26 10:49:50,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4122 states, 3160 states have (on average 1.5341772151898734) internal successors, (4848), 3180 states have internal predecessors, (4848), 855 states have call successors, (855), 106 states have call predecessors, (855), 106 states have return successors, (855), 835 states have call predecessors, (855), 855 states have call successors, (855) [2023-11-26 10:49:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 6558 transitions. [2023-11-26 10:49:50,254 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 6558 transitions. Word has length 541 [2023-11-26 10:49:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:50,256 INFO L495 AbstractCegarLoop]: Abstraction has 4122 states and 6558 transitions. [2023-11-26 10:49:50,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 10.428571428571429) internal successors, (219), 20 states have internal predecessors, (219), 8 states have call successors, (174), 5 states have call predecessors, (174), 9 states have return successors, (174), 8 states have call predecessors, (174), 8 states have call successors, (174) [2023-11-26 10:49:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 6558 transitions. [2023-11-26 10:49:50,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2023-11-26 10:49:50,263 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:50,263 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:50,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:50,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 10:49:50,473 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:50,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:50,473 INFO L85 PathProgramCache]: Analyzing trace with hash 703508813, now seen corresponding path program 1 times [2023-11-26 10:49:50,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:50,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038915510] [2023-11-26 10:49:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:50,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:50,532 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:50,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077799908] [2023-11-26 10:49:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:50,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:50,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:50,535 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:50,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1df487c9-8b14-4564-a483-072b83cb34e7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process