./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-16.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-16.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu --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 5156256452dc861aba62ea76c0f9e47cdd0f69dc1017e09229ee6055fbff4337 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:33:55,447 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:33:55,568 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:33:55,576 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:33:55,577 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:33:55,616 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:33:55,617 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:33:55,618 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:33:55,619 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:33:55,624 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:33:55,625 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:33:55,625 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:33:55,626 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:33:55,628 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:33:55,628 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:33:55,628 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:33:55,629 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:33:55,629 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:33:55,630 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:33:55,630 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:33:55,631 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:33:55,632 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:33:55,632 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:33:55,632 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:33:55,633 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:33:55,634 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:33:55,634 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:33:55,635 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:33:55,635 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:33:55,636 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:33:55,637 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:33:55,637 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:33:55,638 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:33:55,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:33:55,638 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:33:55,638 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:33:55,639 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:33:55,639 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:33:55,639 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:33:55,639 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_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5156256452dc861aba62ea76c0f9e47cdd0f69dc1017e09229ee6055fbff4337 [2023-11-19 07:33:55,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:33:55,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:33:55,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:33:55,951 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:33:55,951 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:33:55,953 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-16.i [2023-11-19 07:33:59,072 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:33:59,416 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:33:59,416 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-16.i [2023-11-19 07:33:59,431 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/data/b6fa65aed/f7ae26dddd1d49c9b4d633b236dd1012/FLAG2d6c89e52 [2023-11-19 07:33:59,445 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/data/b6fa65aed/f7ae26dddd1d49c9b4d633b236dd1012 [2023-11-19 07:33:59,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:33:59,450 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:33:59,451 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:33:59,452 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:33:59,457 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:33:59,457 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:33:59" (1/1) ... [2023-11-19 07:33:59,458 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59b1e477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:59, skipping insertion in model container [2023-11-19 07:33:59,459 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:33:59" (1/1) ... [2023-11-19 07:33:59,530 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:33:59,668 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_16855285-3dc2-4026-a9bd-7e0291da6fa4/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-16.i[916,929] [2023-11-19 07:33:59,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:33:59,944 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:33:59,954 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_16855285-3dc2-4026-a9bd-7e0291da6fa4/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-16.i[916,929] [2023-11-19 07:34:00,075 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:34:00,103 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:34:00,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:00 WrapperNode [2023-11-19 07:34:00,103 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:34:00,104 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:34:00,104 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:34:00,104 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:34:00,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:00" (1/1) ... [2023-11-19 07:34:00,136 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:00" (1/1) ... [2023-11-19 07:34:00,264 INFO L138 Inliner]: procedures = 26, calls = 116, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 925 [2023-11-19 07:34:00,265 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:34:00,265 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:34:00,266 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:34:00,266 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:34:00,275 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:00" (1/1) ... [2023-11-19 07:34:00,276 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:00" (1/1) ... [2023-11-19 07:34:00,301 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:00" (1/1) ... [2023-11-19 07:34:00,301 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:00" (1/1) ... [2023-11-19 07:34:00,386 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:00" (1/1) ... [2023-11-19 07:34:00,394 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:00" (1/1) ... [2023-11-19 07:34:00,416 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:00" (1/1) ... [2023-11-19 07:34:00,426 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:00" (1/1) ... [2023-11-19 07:34:00,449 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:34:00,451 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:34:00,451 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:34:00,452 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:34:00,453 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:00" (1/1) ... [2023-11-19 07:34:00,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:34:00,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:00,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:34:00,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:34:00,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:34:00,535 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:34:00,535 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:34:00,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:34:00,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:34:00,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:34:00,730 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:34:00,732 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:34:02,096 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:34:02,109 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:34:02,109 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:34:02,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:02 BoogieIcfgContainer [2023-11-19 07:34:02,116 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:34:02,119 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:34:02,119 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:34:02,122 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:34:02,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:33:59" (1/3) ... [2023-11-19 07:34:02,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2deac7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:02, skipping insertion in model container [2023-11-19 07:34:02,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:00" (2/3) ... [2023-11-19 07:34:02,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2deac7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:02, skipping insertion in model container [2023-11-19 07:34:02,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:02" (3/3) ... [2023-11-19 07:34:02,126 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-16.i [2023-11-19 07:34:02,147 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:34:02,147 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:34:02,213 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:34:02,220 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;@14210ba, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:34:02,220 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:34:02,227 INFO L276 IsEmpty]: Start isEmpty. Operand has 345 states, 239 states have (on average 1.6485355648535565) internal successors, (394), 240 states have internal predecessors, (394), 103 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-19 07:34:02,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2023-11-19 07:34:02,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:02,279 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:02,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:02,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:02,286 INFO L85 PathProgramCache]: Analyzing trace with hash -273723154, now seen corresponding path program 1 times [2023-11-19 07:34:02,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:02,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078440314] [2023-11-19 07:34:02,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:02,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:02,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:02,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078440314] [2023-11-19 07:34:02,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:34:02,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169529525] [2023-11-19 07:34:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:02,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:02,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:02,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:02,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:34:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:03,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 1625 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:34:03,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 21012 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 20808 trivial. 0 not checked. [2023-11-19 07:34:03,653 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:03,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169529525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:03,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:03,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:34:03,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113352643] [2023-11-19 07:34:03,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:03,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:34:03,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:03,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:34:03,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:34:03,704 INFO L87 Difference]: Start difference. First operand has 345 states, 239 states have (on average 1.6485355648535565) internal successors, (394), 240 states have internal predecessors, (394), 103 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) Second operand has 2 states, 2 states have (on average 78.5) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (103), 2 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 2 states have call successors, (103) [2023-11-19 07:34:03,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:03,806 INFO L93 Difference]: Finished difference Result 683 states and 1297 transitions. [2023-11-19 07:34:03,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:34:03,817 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 78.5) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (103), 2 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 2 states have call successors, (103) Word has length 667 [2023-11-19 07:34:03,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:03,831 INFO L225 Difference]: With dead ends: 683 [2023-11-19 07:34:03,832 INFO L226 Difference]: Without dead ends: 341 [2023-11-19 07:34:03,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:34:03,847 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:03,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:34:03,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-11-19 07:34:03,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2023-11-19 07:34:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 236 states have (on average 1.6271186440677967) internal successors, (384), 236 states have internal predecessors, (384), 103 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-19 07:34:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 590 transitions. [2023-11-19 07:34:03,990 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 590 transitions. Word has length 667 [2023-11-19 07:34:03,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:03,991 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 590 transitions. [2023-11-19 07:34:03,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.5) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (103), 2 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 2 states have call successors, (103) [2023-11-19 07:34:03,992 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 590 transitions. [2023-11-19 07:34:04,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2023-11-19 07:34:04,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:04,017 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:04,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:04,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:34:04,241 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:04,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:04,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1290394816, now seen corresponding path program 1 times [2023-11-19 07:34:04,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:04,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913822157] [2023-11-19 07:34:04,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:04,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:04,455 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:04,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291048207] [2023-11-19 07:34:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:04,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:04,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:04,458 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:04,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:34:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:05,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 1625 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:34:05,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 21012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21012 trivial. 0 not checked. [2023-11-19 07:34:05,299 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:05,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:05,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913822157] [2023-11-19 07:34:05,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:05,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291048207] [2023-11-19 07:34:05,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291048207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:05,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:05,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:34:05,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392210973] [2023-11-19 07:34:05,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:05,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:34:05,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:05,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:34:05,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:34:05,315 INFO L87 Difference]: Start difference. First operand 341 states and 590 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:05,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:05,954 INFO L93 Difference]: Finished difference Result 1112 states and 1942 transitions. [2023-11-19 07:34:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:34:05,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) Word has length 667 [2023-11-19 07:34:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:05,975 INFO L225 Difference]: With dead ends: 1112 [2023-11-19 07:34:05,975 INFO L226 Difference]: Without dead ends: 774 [2023-11-19 07:34:05,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:34:05,983 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 791 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:05,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 1890 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:34:05,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2023-11-19 07:34:06,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 768. [2023-11-19 07:34:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 592 states have (on average 1.6993243243243243) internal successors, (1006), 594 states have internal predecessors, (1006), 171 states have call successors, (171), 4 states have call predecessors, (171), 4 states have return successors, (171), 169 states have call predecessors, (171), 171 states have call successors, (171) [2023-11-19 07:34:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1348 transitions. [2023-11-19 07:34:06,146 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1348 transitions. Word has length 667 [2023-11-19 07:34:06,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:06,151 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1348 transitions. [2023-11-19 07:34:06,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1348 transitions. [2023-11-19 07:34:06,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2023-11-19 07:34:06,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:06,181 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:06,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:06,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:06,397 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:06,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:06,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1050155070, now seen corresponding path program 1 times [2023-11-19 07:34:06,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:06,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012772309] [2023-11-19 07:34:06,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:06,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:06,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:06,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428197058] [2023-11-19 07:34:06,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:06,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:06,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:06,544 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:06,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:34:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:07,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 1623 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:34:07,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21012 trivial. 0 not checked. [2023-11-19 07:34:08,102 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:08,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:08,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012772309] [2023-11-19 07:34:08,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:08,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428197058] [2023-11-19 07:34:08,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428197058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:08,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:08,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:34:08,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549561309] [2023-11-19 07:34:08,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:08,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:34:08,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:08,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:34:08,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:34:08,108 INFO L87 Difference]: Start difference. First operand 768 states and 1348 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:08,713 INFO L93 Difference]: Finished difference Result 2824 states and 4948 transitions. [2023-11-19 07:34:08,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:34:08,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) Word has length 667 [2023-11-19 07:34:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:08,738 INFO L225 Difference]: With dead ends: 2824 [2023-11-19 07:34:08,738 INFO L226 Difference]: Without dead ends: 2059 [2023-11-19 07:34:08,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:34:08,746 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 727 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:08,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 1648 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:34:08,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2023-11-19 07:34:09,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1924. [2023-11-19 07:34:09,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1503 states have (on average 1.705921490352628) internal successors, (2564), 1509 states have internal predecessors, (2564), 410 states have call successors, (410), 10 states have call predecessors, (410), 10 states have return successors, (410), 404 states have call predecessors, (410), 410 states have call successors, (410) [2023-11-19 07:34:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 3384 transitions. [2023-11-19 07:34:09,026 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 3384 transitions. Word has length 667 [2023-11-19 07:34:09,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:09,028 INFO L495 AbstractCegarLoop]: Abstraction has 1924 states and 3384 transitions. [2023-11-19 07:34:09,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:09,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 3384 transitions. [2023-11-19 07:34:09,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2023-11-19 07:34:09,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:09,038 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:09,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:09,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:09,252 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:09,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:09,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1943641408, now seen corresponding path program 1 times [2023-11-19 07:34:09,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:09,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156389521] [2023-11-19 07:34:09,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:09,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:09,385 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:09,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890349326] [2023-11-19 07:34:09,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:09,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:09,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:09,387 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:09,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:34:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:09,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 1623 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:34:09,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21012 trivial. 0 not checked. [2023-11-19 07:34:10,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:10,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:10,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156389521] [2023-11-19 07:34:10,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:10,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890349326] [2023-11-19 07:34:10,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890349326] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:10,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:10,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:34:10,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811588391] [2023-11-19 07:34:10,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:10,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:10,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:10,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:10,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:10,032 INFO L87 Difference]: Start difference. First operand 1924 states and 3384 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:10,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:10,274 INFO L93 Difference]: Finished difference Result 5327 states and 9323 transitions. [2023-11-19 07:34:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:10,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) Word has length 667 [2023-11-19 07:34:10,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:10,305 INFO L225 Difference]: With dead ends: 5327 [2023-11-19 07:34:10,306 INFO L226 Difference]: Without dead ends: 3406 [2023-11-19 07:34:10,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:10,314 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 375 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:10,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 1324 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:34:10,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2023-11-19 07:34:10,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 3402. [2023-11-19 07:34:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 2635 states have (on average 1.6743833017077798) internal successors, (4412), 2649 states have internal predecessors, (4412), 746 states have call successors, (746), 20 states have call predecessors, (746), 20 states have return successors, (746), 732 states have call predecessors, (746), 746 states have call successors, (746) [2023-11-19 07:34:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 5904 transitions. [2023-11-19 07:34:10,711 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 5904 transitions. Word has length 667 [2023-11-19 07:34:10,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:10,714 INFO L495 AbstractCegarLoop]: Abstraction has 3402 states and 5904 transitions. [2023-11-19 07:34:10,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 5904 transitions. [2023-11-19 07:34:10,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2023-11-19 07:34:10,726 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:10,727 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:10,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:10,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:10,944 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:10,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:10,945 INFO L85 PathProgramCache]: Analyzing trace with hash 17933250, now seen corresponding path program 1 times [2023-11-19 07:34:10,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:10,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596195047] [2023-11-19 07:34:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:10,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:11,047 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:11,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893118871] [2023-11-19 07:34:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:11,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:11,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:11,049 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:11,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:34:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:11,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 1622 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:34:11,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21012 trivial. 0 not checked. [2023-11-19 07:34:12,511 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:12,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:12,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596195047] [2023-11-19 07:34:12,512 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:12,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893118871] [2023-11-19 07:34:12,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893118871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:12,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:12,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:34:12,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55273667] [2023-11-19 07:34:12,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:12,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:12,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:12,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:12,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:12,523 INFO L87 Difference]: Start difference. First operand 3402 states and 5904 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:12,778 INFO L93 Difference]: Finished difference Result 8043 states and 13942 transitions. [2023-11-19 07:34:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:12,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) Word has length 667 [2023-11-19 07:34:12,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:12,820 INFO L225 Difference]: With dead ends: 8043 [2023-11-19 07:34:12,821 INFO L226 Difference]: Without dead ends: 4644 [2023-11-19 07:34:12,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:12,833 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 239 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:12,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 1238 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:34:12,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4644 states. [2023-11-19 07:34:13,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4644 to 4642. [2023-11-19 07:34:13,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 3562 states have (on average 1.6656372824256036) internal successors, (5933), 3581 states have internal predecessors, (5933), 1051 states have call successors, (1051), 28 states have call predecessors, (1051), 28 states have return successors, (1051), 1032 states have call predecessors, (1051), 1051 states have call successors, (1051) [2023-11-19 07:34:13,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 8035 transitions. [2023-11-19 07:34:13,423 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 8035 transitions. Word has length 667 [2023-11-19 07:34:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:13,424 INFO L495 AbstractCegarLoop]: Abstraction has 4642 states and 8035 transitions. [2023-11-19 07:34:13,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 8035 transitions. [2023-11-19 07:34:13,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2023-11-19 07:34:13,436 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:13,437 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:13,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:13,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:13,660 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:13,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:13,661 INFO L85 PathProgramCache]: Analyzing trace with hash 589142026, now seen corresponding path program 1 times [2023-11-19 07:34:13,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:13,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352687713] [2023-11-19 07:34:13,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:13,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:13,809 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:13,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155792467] [2023-11-19 07:34:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:13,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:13,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:13,812 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:13,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:34:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:14,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:34:14,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 21012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21012 trivial. 0 not checked. [2023-11-19 07:34:14,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:14,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:14,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352687713] [2023-11-19 07:34:14,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:14,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155792467] [2023-11-19 07:34:14,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155792467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:14,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:14,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:34:14,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454828199] [2023-11-19 07:34:14,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:14,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:14,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:14,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:14,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:14,473 INFO L87 Difference]: Start difference. First operand 4642 states and 8035 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:14,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:14,966 INFO L93 Difference]: Finished difference Result 13216 states and 22880 transitions. [2023-11-19 07:34:14,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:14,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) Word has length 669 [2023-11-19 07:34:14,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:15,034 INFO L225 Difference]: With dead ends: 13216 [2023-11-19 07:34:15,034 INFO L226 Difference]: Without dead ends: 8688 [2023-11-19 07:34:15,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 667 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:15,051 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 384 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:15,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 1298 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:34:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8688 states. [2023-11-19 07:34:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8688 to 8681. [2023-11-19 07:34:15,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8681 states, 6751 states have (on average 1.6584209746704193) internal successors, (11196), 6791 states have internal predecessors, (11196), 1875 states have call successors, (1875), 54 states have call predecessors, (1875), 54 states have return successors, (1875), 1835 states have call predecessors, (1875), 1875 states have call successors, (1875) [2023-11-19 07:34:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8681 states to 8681 states and 14946 transitions. [2023-11-19 07:34:15,995 INFO L78 Accepts]: Start accepts. Automaton has 8681 states and 14946 transitions. Word has length 669 [2023-11-19 07:34:15,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:15,997 INFO L495 AbstractCegarLoop]: Abstraction has 8681 states and 14946 transitions. [2023-11-19 07:34:15,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:15,998 INFO L276 IsEmpty]: Start isEmpty. Operand 8681 states and 14946 transitions. [2023-11-19 07:34:16,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2023-11-19 07:34:16,018 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:16,018 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:16,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:16,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:16,232 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:16,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:16,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2007247410, now seen corresponding path program 1 times [2023-11-19 07:34:16,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:16,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727203445] [2023-11-19 07:34:16,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:16,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:16,341 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:16,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882154362] [2023-11-19 07:34:16,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:16,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:16,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:16,343 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:16,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:34:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:16,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:34:16,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 21012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21012 trivial. 0 not checked. [2023-11-19 07:34:16,968 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:16,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:16,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727203445] [2023-11-19 07:34:16,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:16,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882154362] [2023-11-19 07:34:17,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882154362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:17,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:17,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:34:17,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345006846] [2023-11-19 07:34:17,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:17,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:17,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:17,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:17,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:17,027 INFO L87 Difference]: Start difference. First operand 8681 states and 14946 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:17,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:17,518 INFO L93 Difference]: Finished difference Result 17265 states and 29726 transitions. [2023-11-19 07:34:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:17,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) Word has length 671 [2023-11-19 07:34:17,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:17,586 INFO L225 Difference]: With dead ends: 17265 [2023-11-19 07:34:17,586 INFO L226 Difference]: Without dead ends: 8698 [2023-11-19 07:34:17,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 669 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:17,618 INFO L413 NwaCegarLoop]: 774 mSDtfsCounter, 392 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:17,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 1311 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:34:17,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8698 states. [2023-11-19 07:34:18,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8698 to 6601. [2023-11-19 07:34:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6601 states, 5340 states have (on average 1.6769662921348314) internal successors, (8955), 5364 states have internal predecessors, (8955), 1223 states have call successors, (1223), 37 states have call predecessors, (1223), 37 states have return successors, (1223), 1199 states have call predecessors, (1223), 1223 states have call successors, (1223) [2023-11-19 07:34:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6601 states to 6601 states and 11401 transitions. [2023-11-19 07:34:18,441 INFO L78 Accepts]: Start accepts. Automaton has 6601 states and 11401 transitions. Word has length 671 [2023-11-19 07:34:18,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:18,442 INFO L495 AbstractCegarLoop]: Abstraction has 6601 states and 11401 transitions. [2023-11-19 07:34:18,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:18,443 INFO L276 IsEmpty]: Start isEmpty. Operand 6601 states and 11401 transitions. [2023-11-19 07:34:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 673 [2023-11-19 07:34:18,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:18,457 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:18,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:18,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:18,684 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:18,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:18,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2051880014, now seen corresponding path program 1 times [2023-11-19 07:34:18,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:18,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164242001] [2023-11-19 07:34:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:18,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:18,780 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:18,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362952096] [2023-11-19 07:34:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:18,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:18,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:18,782 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:18,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:34:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:19,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 1631 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:34:19,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 21012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21012 trivial. 0 not checked. [2023-11-19 07:34:19,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:19,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:19,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164242001] [2023-11-19 07:34:19,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:19,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362952096] [2023-11-19 07:34:19,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362952096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:19,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:19,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:34:19,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930253707] [2023-11-19 07:34:19,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:19,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:19,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:19,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:19,474 INFO L87 Difference]: Start difference. First operand 6601 states and 11401 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:20,141 INFO L93 Difference]: Finished difference Result 19525 states and 33755 transitions. [2023-11-19 07:34:20,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:20,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) Word has length 672 [2023-11-19 07:34:20,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:20,182 INFO L225 Difference]: With dead ends: 19525 [2023-11-19 07:34:20,183 INFO L226 Difference]: Without dead ends: 13042 [2023-11-19 07:34:20,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:20,198 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 549 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:20,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 1204 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:34:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13042 states. [2023-11-19 07:34:21,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13042 to 13040. [2023-11-19 07:34:21,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13040 states, 10587 states have (on average 1.669216964201379) internal successors, (17672), 10634 states have internal predecessors, (17672), 2380 states have call successors, (2380), 72 states have call predecessors, (2380), 72 states have return successors, (2380), 2333 states have call predecessors, (2380), 2380 states have call successors, (2380) [2023-11-19 07:34:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13040 states to 13040 states and 22432 transitions. [2023-11-19 07:34:21,291 INFO L78 Accepts]: Start accepts. Automaton has 13040 states and 22432 transitions. Word has length 672 [2023-11-19 07:34:21,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:21,292 INFO L495 AbstractCegarLoop]: Abstraction has 13040 states and 22432 transitions. [2023-11-19 07:34:21,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:21,293 INFO L276 IsEmpty]: Start isEmpty. Operand 13040 states and 22432 transitions. [2023-11-19 07:34:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 673 [2023-11-19 07:34:21,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:21,314 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:21,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:21,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:21,538 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:21,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:21,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2024814412, now seen corresponding path program 1 times [2023-11-19 07:34:21,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:21,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398942196] [2023-11-19 07:34:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:21,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:21,630 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:21,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722140176] [2023-11-19 07:34:21,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:21,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:21,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:21,632 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:21,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:34:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:22,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:34:22,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 21012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21012 trivial. 0 not checked. [2023-11-19 07:34:22,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:22,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:22,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398942196] [2023-11-19 07:34:22,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:22,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722140176] [2023-11-19 07:34:22,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722140176] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:22,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:22,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:34:22,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985433364] [2023-11-19 07:34:22,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:22,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:22,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:22,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:22,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:22,302 INFO L87 Difference]: Start difference. First operand 13040 states and 22432 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:23,382 INFO L93 Difference]: Finished difference Result 25973 states and 44701 transitions. [2023-11-19 07:34:23,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:23,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) Word has length 672 [2023-11-19 07:34:23,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:23,440 INFO L225 Difference]: With dead ends: 25973 [2023-11-19 07:34:23,441 INFO L226 Difference]: Without dead ends: 13051 [2023-11-19 07:34:23,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:23,477 INFO L413 NwaCegarLoop]: 1060 mSDtfsCounter, 530 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:23,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 1639 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:34:23,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13051 states. [2023-11-19 07:34:24,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13051 to 13049. [2023-11-19 07:34:24,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13049 states, 10596 states have (on average 1.659777274443186) internal successors, (17587), 10643 states have internal predecessors, (17587), 2380 states have call successors, (2380), 72 states have call predecessors, (2380), 72 states have return successors, (2380), 2333 states have call predecessors, (2380), 2380 states have call successors, (2380) [2023-11-19 07:34:24,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13049 states to 13049 states and 22347 transitions. [2023-11-19 07:34:24,697 INFO L78 Accepts]: Start accepts. Automaton has 13049 states and 22347 transitions. Word has length 672 [2023-11-19 07:34:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:24,699 INFO L495 AbstractCegarLoop]: Abstraction has 13049 states and 22347 transitions. [2023-11-19 07:34:24,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 13049 states and 22347 transitions. [2023-11-19 07:34:24,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 673 [2023-11-19 07:34:24,721 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:24,722 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:24,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:24,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 07:34:24,936 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:24,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:24,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1760679794, now seen corresponding path program 1 times [2023-11-19 07:34:24,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:24,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216384751] [2023-11-19 07:34:24,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:24,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:25,030 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:25,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8819729] [2023-11-19 07:34:25,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:25,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:25,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:25,032 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:25,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:34:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:25,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:34:25,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 21012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21012 trivial. 0 not checked. [2023-11-19 07:34:25,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:25,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:25,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216384751] [2023-11-19 07:34:25,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:25,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8819729] [2023-11-19 07:34:25,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8819729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:25,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:25,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:34:25,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874623364] [2023-11-19 07:34:25,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:25,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:25,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:25,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:25,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:25,704 INFO L87 Difference]: Start difference. First operand 13049 states and 22347 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:27,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:27,069 INFO L93 Difference]: Finished difference Result 38296 states and 65483 transitions. [2023-11-19 07:34:27,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:27,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) Word has length 672 [2023-11-19 07:34:27,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:27,163 INFO L225 Difference]: With dead ends: 38296 [2023-11-19 07:34:27,163 INFO L226 Difference]: Without dead ends: 25365 [2023-11-19 07:34:27,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:27,195 INFO L413 NwaCegarLoop]: 1019 mSDtfsCounter, 506 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:27,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1578 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:34:27,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25365 states. [2023-11-19 07:34:28,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25365 to 15017. [2023-11-19 07:34:28,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15017 states, 12564 states have (on average 1.6926934097421202) internal successors, (21267), 12611 states have internal predecessors, (21267), 2380 states have call successors, (2380), 72 states have call predecessors, (2380), 72 states have return successors, (2380), 2333 states have call predecessors, (2380), 2380 states have call successors, (2380) [2023-11-19 07:34:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15017 states to 15017 states and 26027 transitions. [2023-11-19 07:34:29,055 INFO L78 Accepts]: Start accepts. Automaton has 15017 states and 26027 transitions. Word has length 672 [2023-11-19 07:34:29,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:29,057 INFO L495 AbstractCegarLoop]: Abstraction has 15017 states and 26027 transitions. [2023-11-19 07:34:29,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 15017 states and 26027 transitions. [2023-11-19 07:34:29,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 673 [2023-11-19 07:34:29,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:29,089 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:29,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:29,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:34:29,309 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:29,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:29,310 INFO L85 PathProgramCache]: Analyzing trace with hash -623244944, now seen corresponding path program 1 times [2023-11-19 07:34:29,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:29,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882490925] [2023-11-19 07:34:29,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:29,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:29,423 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:29,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991238971] [2023-11-19 07:34:29,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:29,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:29,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:29,425 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:29,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:34:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:30,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:34:30,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 21012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21012 trivial. 0 not checked. [2023-11-19 07:34:31,244 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:31,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:31,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882490925] [2023-11-19 07:34:31,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:31,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991238971] [2023-11-19 07:34:31,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991238971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:31,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:31,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:34:31,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332355668] [2023-11-19 07:34:31,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:31,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:34:31,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:34:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:34:31,249 INFO L87 Difference]: Start difference. First operand 15017 states and 26027 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:34,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:34,220 INFO L93 Difference]: Finished difference Result 40047 states and 69226 transitions. [2023-11-19 07:34:34,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:34:34,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) Word has length 672 [2023-11-19 07:34:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:34,291 INFO L225 Difference]: With dead ends: 40047 [2023-11-19 07:34:34,291 INFO L226 Difference]: Without dead ends: 25148 [2023-11-19 07:34:34,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:34:34,314 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 1462 mSDsluCounter, 2180 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 2811 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:34,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1462 Valid, 2811 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 07:34:34,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25148 states. [2023-11-19 07:34:35,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25148 to 19280. [2023-11-19 07:34:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19280 states, 16247 states have (on average 1.6926817258570812) internal successors, (27501), 16314 states have internal predecessors, (27501), 2940 states have call successors, (2940), 92 states have call predecessors, (2940), 92 states have return successors, (2940), 2873 states have call predecessors, (2940), 2940 states have call successors, (2940) [2023-11-19 07:34:35,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19280 states to 19280 states and 33381 transitions. [2023-11-19 07:34:35,647 INFO L78 Accepts]: Start accepts. Automaton has 19280 states and 33381 transitions. Word has length 672 [2023-11-19 07:34:35,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:35,649 INFO L495 AbstractCegarLoop]: Abstraction has 19280 states and 33381 transitions. [2023-11-19 07:34:35,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:35,649 INFO L276 IsEmpty]: Start isEmpty. Operand 19280 states and 33381 transitions. [2023-11-19 07:34:35,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 673 [2023-11-19 07:34:35,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:35,676 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:35,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:35,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:34:35,892 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:35,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:35,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1040641550, now seen corresponding path program 1 times [2023-11-19 07:34:35,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:35,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582998146] [2023-11-19 07:34:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:35,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:35,985 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:35,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098128563] [2023-11-19 07:34:35,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:35,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:35,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:35,987 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:36,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16855285-3dc2-4026-a9bd-7e0291da6fa4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:34:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:36,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 1627 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:34:36,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 21012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21012 trivial. 0 not checked. [2023-11-19 07:34:37,666 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:37,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:37,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582998146] [2023-11-19 07:34:37,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:37,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098128563] [2023-11-19 07:34:37,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098128563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:37,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:37,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:34:37,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228995443] [2023-11-19 07:34:37,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:37,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:34:37,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:37,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:34:37,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:34:37,670 INFO L87 Difference]: Start difference. First operand 19280 states and 33381 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) [2023-11-19 07:34:40,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:40,842 INFO L93 Difference]: Finished difference Result 49734 states and 86093 transitions. [2023-11-19 07:34:40,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:34:40,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (103), 1 states have call predecessors, (103), 1 states have return successors, (103), 1 states have call predecessors, (103), 1 states have call successors, (103) Word has length 672 [2023-11-19 07:34:40,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:40,941 INFO L225 Difference]: With dead ends: 49734 [2023-11-19 07:34:40,942 INFO L226 Difference]: Without dead ends: 30572 [2023-11-19 07:34:40,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 667 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:34:40,973 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 2576 mSDsluCounter, 1986 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2576 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:40,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2576 Valid, 2646 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 07:34:41,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30572 states.