./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-50_file-81.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_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/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_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-50_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/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_a83803b1-0324-41d0-a335-f3b8d07a046d/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 47dd68ea39604b487f233f68e029f640f8a21785e687328515d4ba55c65777c4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:46:11,463 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:46:11,562 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:46:11,568 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:46:11,568 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:46:11,592 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:46:11,593 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:46:11,594 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:46:11,594 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:46:11,595 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:46:11,596 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:46:11,596 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:46:11,597 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:46:11,598 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:46:11,598 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:46:11,599 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:46:11,599 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:46:11,600 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:46:11,600 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:46:11,601 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:46:11,601 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:46:11,602 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:46:11,603 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:46:11,603 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:46:11,604 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:46:11,604 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:46:11,604 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:46:11,605 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:46:11,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:46:11,606 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:46:11,606 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:46:11,607 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:46:11,607 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:46:11,607 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:46:11,607 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:46:11,608 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:46:11,608 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:46:11,608 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:46:11,608 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:46:11,608 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_a83803b1-0324-41d0-a335-f3b8d07a046d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47dd68ea39604b487f233f68e029f640f8a21785e687328515d4ba55c65777c4 [2023-11-19 07:46:11,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:46:11,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:46:11,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:46:11,940 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:46:11,941 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:46:11,942 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-50_file-81.i [2023-11-19 07:46:15,240 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:46:15,554 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:46:15,554 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-50_file-81.i [2023-11-19 07:46:15,569 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/data/34d79c4c2/b44512c8b73248f397a11d259502808a/FLAGa413fbfbe [2023-11-19 07:46:15,602 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/data/34d79c4c2/b44512c8b73248f397a11d259502808a [2023-11-19 07:46:15,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:46:15,613 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:46:15,616 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:46:15,616 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:46:15,622 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:46:15,623 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:46:15" (1/1) ... [2023-11-19 07:46:15,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@214f5d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:15, skipping insertion in model container [2023-11-19 07:46:15,624 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:46:15" (1/1) ... [2023-11-19 07:46:15,682 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:46:15,874 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_a83803b1-0324-41d0-a335-f3b8d07a046d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-50_file-81.i[915,928] [2023-11-19 07:46:16,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:46:16,020 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:46:16,033 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_a83803b1-0324-41d0-a335-f3b8d07a046d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-50_file-81.i[915,928] [2023-11-19 07:46:16,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:46:16,102 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:46:16,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:16 WrapperNode [2023-11-19 07:46:16,103 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:46:16,104 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:46:16,104 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:46:16,105 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:46:16,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:16" (1/1) ... [2023-11-19 07:46:16,140 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:16" (1/1) ... [2023-11-19 07:46:16,206 INFO L138 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 307 [2023-11-19 07:46:16,206 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:46:16,207 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:46:16,207 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:46:16,208 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:46:16,217 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:16" (1/1) ... [2023-11-19 07:46:16,218 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:16" (1/1) ... [2023-11-19 07:46:16,236 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:16" (1/1) ... [2023-11-19 07:46:16,237 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:16" (1/1) ... [2023-11-19 07:46:16,265 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:16" (1/1) ... [2023-11-19 07:46:16,270 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:16" (1/1) ... [2023-11-19 07:46:16,277 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:16" (1/1) ... [2023-11-19 07:46:16,285 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:16" (1/1) ... [2023-11-19 07:46:16,292 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:46:16,293 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:46:16,293 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:46:16,294 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:46:16,294 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:16" (1/1) ... [2023-11-19 07:46:16,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:46:16,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:16,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:46:16,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:46:16,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:46:16,371 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:46:16,372 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:46:16,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:46:16,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:46:16,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:46:16,502 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:46:16,505 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:46:17,197 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:46:17,207 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:46:17,208 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:46:17,213 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:46:17 BoogieIcfgContainer [2023-11-19 07:46:17,213 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:46:17,216 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:46:17,216 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:46:17,220 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:46:17,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:46:15" (1/3) ... [2023-11-19 07:46:17,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f8ae4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:46:17, skipping insertion in model container [2023-11-19 07:46:17,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:16" (2/3) ... [2023-11-19 07:46:17,222 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f8ae4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:46:17, skipping insertion in model container [2023-11-19 07:46:17,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:46:17" (3/3) ... [2023-11-19 07:46:17,223 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-50_file-81.i [2023-11-19 07:46:17,249 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:46:17,250 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:46:17,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:46:17,338 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;@258a9f98, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:46:17,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:46:17,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 77 states have (on average 1.4415584415584415) internal successors, (111), 78 states have internal predecessors, (111), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-19 07:46:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-19 07:46:17,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:17,382 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:17,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:17,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:17,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1886126924, now seen corresponding path program 1 times [2023-11-19 07:46:17,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:17,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95403321] [2023-11-19 07:46:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:17,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:17,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:17,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95403321] [2023-11-19 07:46:17,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:46:17,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386634438] [2023-11-19 07:46:17,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:17,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:17,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:17,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:17,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:46:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:18,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:46:18,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 4802 trivial. 0 not checked. [2023-11-19 07:46:18,294 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:18,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386634438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:18,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:18,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:46:18,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002228472] [2023-11-19 07:46:18,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:18,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:46:18,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:18,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:46:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:46:18,361 INFO L87 Difference]: Start difference. First operand has 130 states, 77 states have (on average 1.4415584415584415) internal successors, (111), 78 states have internal predecessors, (111), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) Second operand has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 2 states have call successors, (50) [2023-11-19 07:46:18,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:18,409 INFO L93 Difference]: Finished difference Result 253 states and 466 transitions. [2023-11-19 07:46:18,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:46:18,412 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 2 states have call successors, (50) Word has length 306 [2023-11-19 07:46:18,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:18,422 INFO L225 Difference]: With dead ends: 253 [2023-11-19 07:46:18,423 INFO L226 Difference]: Without dead ends: 126 [2023-11-19 07:46:18,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 305 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 07:46:18,432 INFO L413 NwaCegarLoop]: 204 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, 204 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 07:46:18,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:46:18,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-19 07:46:18,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-11-19 07:46:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 74 states have internal predecessors, (104), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-19 07:46:18,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 204 transitions. [2023-11-19 07:46:18,513 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 204 transitions. Word has length 306 [2023-11-19 07:46:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:18,515 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 204 transitions. [2023-11-19 07:46:18,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 2 states have call successors, (50) [2023-11-19 07:46:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 204 transitions. [2023-11-19 07:46:18,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-19 07:46:18,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:18,526 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:18,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:18,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:46:18,744 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:18,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:18,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1543542012, now seen corresponding path program 1 times [2023-11-19 07:46:18,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:18,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268140482] [2023-11-19 07:46:18,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:18,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:18,841 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:18,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573963126] [2023-11-19 07:46:18,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:18,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:18,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:18,848 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:18,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:46:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:19,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:46:19,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1522 proven. 261 refuted. 0 times theorem prover too weak. 3117 trivial. 0 not checked. [2023-11-19 07:46:20,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:46:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 27 proven. 264 refuted. 0 times theorem prover too weak. 4609 trivial. 0 not checked. [2023-11-19 07:46:21,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268140482] [2023-11-19 07:46:21,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573963126] [2023-11-19 07:46:21,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573963126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:46:21,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:46:21,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-19 07:46:21,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375222911] [2023-11-19 07:46:21,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:46:21,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:46:21,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:21,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:46:21,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:46:21,431 INFO L87 Difference]: Start difference. First operand 126 states and 204 transitions. Second operand has 16 states, 16 states have (on average 7.5625) internal successors, (121), 16 states have internal predecessors, (121), 5 states have call successors, (99), 3 states have call predecessors, (99), 7 states have return successors, (100), 4 states have call predecessors, (100), 5 states have call successors, (100) [2023-11-19 07:46:22,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:22,641 INFO L93 Difference]: Finished difference Result 348 states and 533 transitions. [2023-11-19 07:46:22,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 07:46:22,645 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.5625) internal successors, (121), 16 states have internal predecessors, (121), 5 states have call successors, (99), 3 states have call predecessors, (99), 7 states have return successors, (100), 4 states have call predecessors, (100), 5 states have call successors, (100) Word has length 306 [2023-11-19 07:46:22,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:22,658 INFO L225 Difference]: With dead ends: 348 [2023-11-19 07:46:22,659 INFO L226 Difference]: Without dead ends: 225 [2023-11-19 07:46:22,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 599 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=356, Invalid=834, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 07:46:22,665 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 336 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:22,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 580 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:46:22,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-19 07:46:22,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 175. [2023-11-19 07:46:22,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 109 states have (on average 1.3302752293577982) internal successors, (145), 110 states have internal predecessors, (145), 60 states have call successors, (60), 5 states have call predecessors, (60), 5 states have return successors, (60), 59 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-19 07:46:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 265 transitions. [2023-11-19 07:46:22,738 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 265 transitions. Word has length 306 [2023-11-19 07:46:22,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:22,742 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 265 transitions. [2023-11-19 07:46:22,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.5625) internal successors, (121), 16 states have internal predecessors, (121), 5 states have call successors, (99), 3 states have call predecessors, (99), 7 states have return successors, (100), 4 states have call predecessors, (100), 5 states have call successors, (100) [2023-11-19 07:46:22,744 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 265 transitions. [2023-11-19 07:46:22,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-19 07:46:22,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:22,751 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:22,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:22,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:22,971 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:22,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:22,971 INFO L85 PathProgramCache]: Analyzing trace with hash 994452571, now seen corresponding path program 1 times [2023-11-19 07:46:22,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:22,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272223369] [2023-11-19 07:46:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:22,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:23,086 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:23,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257346106] [2023-11-19 07:46:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:23,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:23,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:23,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:23,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:46:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:23,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:46:23,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-19 07:46:23,359 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:23,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:23,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272223369] [2023-11-19 07:46:23,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:23,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257346106] [2023-11-19 07:46:23,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257346106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:23,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:23,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:46:23,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658363809] [2023-11-19 07:46:23,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:23,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:46:23,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:23,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:46:23,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:46:23,363 INFO L87 Difference]: Start difference. First operand 175 states and 265 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-19 07:46:23,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:23,452 INFO L93 Difference]: Finished difference Result 383 states and 567 transitions. [2023-11-19 07:46:23,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:46:23,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 307 [2023-11-19 07:46:23,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:23,457 INFO L225 Difference]: With dead ends: 383 [2023-11-19 07:46:23,457 INFO L226 Difference]: Without dead ends: 211 [2023-11-19 07:46:23,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 304 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 07:46:23,459 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 62 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:23,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 556 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:46:23,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-19 07:46:23,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2023-11-19 07:46:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 135 states have (on average 1.2740740740740741) internal successors, (172), 137 states have internal predecessors, (172), 64 states have call successors, (64), 8 states have call predecessors, (64), 8 states have return successors, (64), 62 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-19 07:46:23,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 300 transitions. [2023-11-19 07:46:23,493 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 300 transitions. Word has length 307 [2023-11-19 07:46:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:23,495 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 300 transitions. [2023-11-19 07:46:23,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-19 07:46:23,495 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 300 transitions. [2023-11-19 07:46:23,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-19 07:46:23,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:23,501 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:23,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:23,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:23,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:23,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:23,713 INFO L85 PathProgramCache]: Analyzing trace with hash 601425561, now seen corresponding path program 1 times [2023-11-19 07:46:23,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:23,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490416503] [2023-11-19 07:46:23,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:23,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:23,771 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:23,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209067281] [2023-11-19 07:46:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:23,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:23,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:23,773 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:23,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:46:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:24,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:46:24,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1479 proven. 39 refuted. 0 times theorem prover too weak. 3382 trivial. 0 not checked. [2023-11-19 07:46:24,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:46:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 249 proven. 42 refuted. 0 times theorem prover too weak. 4609 trivial. 0 not checked. [2023-11-19 07:46:25,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:25,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490416503] [2023-11-19 07:46:25,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:25,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209067281] [2023-11-19 07:46:25,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209067281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:46:25,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:46:25,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-19 07:46:25,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300702015] [2023-11-19 07:46:25,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:46:25,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:46:25,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:25,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:46:25,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:46:25,240 INFO L87 Difference]: Start difference. First operand 208 states and 300 transitions. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 6 states have call successors, (100), 4 states have call predecessors, (100), 8 states have return successors, (100), 6 states have call predecessors, (100), 6 states have call successors, (100) [2023-11-19 07:46:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:27,375 INFO L93 Difference]: Finished difference Result 1153 states and 1682 transitions. [2023-11-19 07:46:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 07:46:27,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 6 states have call successors, (100), 4 states have call predecessors, (100), 8 states have return successors, (100), 6 states have call predecessors, (100), 6 states have call successors, (100) Word has length 307 [2023-11-19 07:46:27,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:27,388 INFO L225 Difference]: With dead ends: 1153 [2023-11-19 07:46:27,388 INFO L226 Difference]: Without dead ends: 948 [2023-11-19 07:46:27,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2023-11-19 07:46:27,394 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 623 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:27,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 1434 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1639 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-19 07:46:27,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2023-11-19 07:46:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 601. [2023-11-19 07:46:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 391 states have (on average 1.2710997442455243) internal successors, (497), 398 states have internal predecessors, (497), 183 states have call successors, (183), 26 states have call predecessors, (183), 26 states have return successors, (183), 176 states have call predecessors, (183), 183 states have call successors, (183) [2023-11-19 07:46:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 863 transitions. [2023-11-19 07:46:27,558 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 863 transitions. Word has length 307 [2023-11-19 07:46:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:27,559 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 863 transitions. [2023-11-19 07:46:27,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 6 states have call successors, (100), 4 states have call predecessors, (100), 8 states have return successors, (100), 6 states have call predecessors, (100), 6 states have call successors, (100) [2023-11-19 07:46:27,560 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 863 transitions. [2023-11-19 07:46:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-19 07:46:27,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:27,566 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:27,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:27,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:27,788 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:27,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:27,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1204012773, now seen corresponding path program 1 times [2023-11-19 07:46:27,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:27,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530055141] [2023-11-19 07:46:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:27,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:27,838 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:27,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757114800] [2023-11-19 07:46:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:27,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:27,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:27,840 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:27,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:46:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:28,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:46:28,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1377 proven. 123 refuted. 0 times theorem prover too weak. 3400 trivial. 0 not checked. [2023-11-19 07:46:28,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:46:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 24 proven. 123 refuted. 0 times theorem prover too weak. 4753 trivial. 0 not checked. [2023-11-19 07:46:28,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:28,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530055141] [2023-11-19 07:46:28,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:28,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757114800] [2023-11-19 07:46:28,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757114800] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:46:28,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:46:28,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-19 07:46:28,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062693128] [2023-11-19 07:46:28,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:46:28,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:46:28,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:28,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:46:28,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:46:28,963 INFO L87 Difference]: Start difference. First operand 601 states and 863 transitions. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 3 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 3 states have call predecessors, (92), 3 states have call successors, (92) [2023-11-19 07:46:29,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:29,999 INFO L93 Difference]: Finished difference Result 1460 states and 2088 transitions. [2023-11-19 07:46:30,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:46:30,000 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 3 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 3 states have call predecessors, (92), 3 states have call successors, (92) Word has length 307 [2023-11-19 07:46:30,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:30,010 INFO L225 Difference]: With dead ends: 1460 [2023-11-19 07:46:30,010 INFO L226 Difference]: Without dead ends: 862 [2023-11-19 07:46:30,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:46:30,013 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 172 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:30,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 1290 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:46:30,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2023-11-19 07:46:30,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 663. [2023-11-19 07:46:30,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 431 states have (on average 1.2250580046403712) internal successors, (528), 439 states have internal predecessors, (528), 194 states have call successors, (194), 37 states have call predecessors, (194), 37 states have return successors, (194), 186 states have call predecessors, (194), 194 states have call successors, (194) [2023-11-19 07:46:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 916 transitions. [2023-11-19 07:46:30,195 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 916 transitions. Word has length 307 [2023-11-19 07:46:30,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:30,196 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 916 transitions. [2023-11-19 07:46:30,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 3 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 3 states have call predecessors, (92), 3 states have call successors, (92) [2023-11-19 07:46:30,196 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 916 transitions. [2023-11-19 07:46:30,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2023-11-19 07:46:30,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:30,205 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:30,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:30,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:30,428 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:30,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:30,428 INFO L85 PathProgramCache]: Analyzing trace with hash 777310784, now seen corresponding path program 1 times [2023-11-19 07:46:30,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:30,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042569584] [2023-11-19 07:46:30,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:30,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:30,492 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:30,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452773267] [2023-11-19 07:46:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:30,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:30,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:30,494 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:30,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:46:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:30,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:46:30,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-19 07:46:31,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:31,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:31,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042569584] [2023-11-19 07:46:31,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:31,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452773267] [2023-11-19 07:46:31,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452773267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:31,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:31,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:46:31,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201080778] [2023-11-19 07:46:31,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:31,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:46:31,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:31,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:46:31,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:46:31,196 INFO L87 Difference]: Start difference. First operand 663 states and 916 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-19 07:46:31,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:31,495 INFO L93 Difference]: Finished difference Result 1288 states and 1788 transitions. [2023-11-19 07:46:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:46:31,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 308 [2023-11-19 07:46:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:31,502 INFO L225 Difference]: With dead ends: 1288 [2023-11-19 07:46:31,502 INFO L226 Difference]: Without dead ends: 666 [2023-11-19 07:46:31,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 305 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 07:46:31,506 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 61 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:31,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 581 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:46:31,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2023-11-19 07:46:31,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 664. [2023-11-19 07:46:31,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 432 states have (on average 1.224537037037037) internal successors, (529), 440 states have internal predecessors, (529), 194 states have call successors, (194), 37 states have call predecessors, (194), 37 states have return successors, (194), 186 states have call predecessors, (194), 194 states have call successors, (194) [2023-11-19 07:46:31,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 917 transitions. [2023-11-19 07:46:31,624 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 917 transitions. Word has length 308 [2023-11-19 07:46:31,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:31,625 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 917 transitions. [2023-11-19 07:46:31,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-19 07:46:31,626 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 917 transitions. [2023-11-19 07:46:31,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-19 07:46:31,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:31,631 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:31,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:31,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:31,848 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:31,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:31,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1576137805, now seen corresponding path program 1 times [2023-11-19 07:46:31,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:31,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703309115] [2023-11-19 07:46:31,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:31,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:31,896 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:31,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061295237] [2023-11-19 07:46:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:31,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:31,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:31,898 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:31,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:46:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:32,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-19 07:46:32,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1341 proven. 528 refuted. 0 times theorem prover too weak. 3031 trivial. 0 not checked. [2023-11-19 07:46:35,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:46:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-19 07:46:45,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:45,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703309115] [2023-11-19 07:46:45,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:45,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061295237] [2023-11-19 07:46:45,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061295237] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:46:45,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:46:45,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 26 [2023-11-19 07:46:45,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941014972] [2023-11-19 07:46:45,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:45,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:46:45,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:45,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:46:45,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-11-19 07:46:45,550 INFO L87 Difference]: Start difference. First operand 664 states and 917 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-19 07:46:47,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:47,469 INFO L93 Difference]: Finished difference Result 1478 states and 2031 transitions. [2023-11-19 07:46:47,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:46:47,470 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) Word has length 309 [2023-11-19 07:46:47,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:47,477 INFO L225 Difference]: With dead ends: 1478 [2023-11-19 07:46:47,478 INFO L226 Difference]: Without dead ends: 855 [2023-11-19 07:46:47,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2023-11-19 07:46:47,482 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 203 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:47,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1083 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:46:47,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2023-11-19 07:46:47,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 694. [2023-11-19 07:46:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 462 states have (on average 1.2294372294372293) internal successors, (568), 470 states have internal predecessors, (568), 194 states have call successors, (194), 37 states have call predecessors, (194), 37 states have return successors, (194), 186 states have call predecessors, (194), 194 states have call successors, (194) [2023-11-19 07:46:47,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 956 transitions. [2023-11-19 07:46:47,620 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 956 transitions. Word has length 309 [2023-11-19 07:46:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:47,622 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 956 transitions. [2023-11-19 07:46:47,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 1 states have call predecessors, (50), 1 states have call successors, (50) [2023-11-19 07:46:47,623 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 956 transitions. [2023-11-19 07:46:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-19 07:46:47,626 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:47,626 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:47,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:47,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:47,840 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:47,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:47,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1834303243, now seen corresponding path program 1 times [2023-11-19 07:46:47,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:47,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830875903] [2023-11-19 07:46:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:47,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:47,879 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:47,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330203837] [2023-11-19 07:46:47,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:47,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:47,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:47,881 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:47,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a83803b1-0324-41d0-a335-f3b8d07a046d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:46:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:48,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-19 07:46:48,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1341 proven. 528 refuted. 0 times theorem prover too weak. 3031 trivial. 0 not checked. [2023-11-19 07:46:56,443 INFO L327 TraceCheckSpWp]: Computing backward predicates...