./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_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_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/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_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/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_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/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 b28ed2134b8a500a12d5d4bc892752e1e825197b4bf6ff6b142642da12ed1a0e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:35:06,645 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:35:06,719 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:35:06,725 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:35:06,726 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:35:06,752 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:35:06,753 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:35:06,753 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:35:06,754 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:35:06,755 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:35:06,756 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:35:06,756 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:35:06,757 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:35:06,758 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:35:06,758 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:35:06,759 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:35:06,759 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:35:06,760 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:35:06,761 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:35:06,761 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:35:06,767 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:35:06,769 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:35:06,769 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:35:06,770 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:35:06,770 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:35:06,771 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:35:06,771 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:35:06,772 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:35:06,772 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:06,773 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:35:06,773 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:35:06,774 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:35:06,774 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:35:06,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:35:06,775 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:35:06,776 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:35:06,776 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:35:06,777 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:35:06,777 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:35:06,777 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_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b28ed2134b8a500a12d5d4bc892752e1e825197b4bf6ff6b142642da12ed1a0e [2023-11-19 07:35:07,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:35:07,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:35:07,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:35:07,148 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:35:07,148 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:35:07,150 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-81.i [2023-11-19 07:35:10,413 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:35:10,695 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:35:10,696 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-81.i [2023-11-19 07:35:10,707 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/data/18688e1af/5b2a76d23b5e4e83a3343987f53bb6d0/FLAGc9cf87fc1 [2023-11-19 07:35:10,757 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/data/18688e1af/5b2a76d23b5e4e83a3343987f53bb6d0 [2023-11-19 07:35:10,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:35:10,764 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:35:10,766 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:10,766 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:35:10,772 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:35:10,773 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:10" (1/1) ... [2023-11-19 07:35:10,775 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@375446b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:10, skipping insertion in model container [2023-11-19 07:35:10,777 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:10" (1/1) ... [2023-11-19 07:35:10,831 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:35:10,987 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_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-81.i[919,932] [2023-11-19 07:35:11,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:11,096 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:35:11,112 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_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-81.i[919,932] [2023-11-19 07:35:11,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:11,221 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:35:11,221 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11 WrapperNode [2023-11-19 07:35:11,222 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:11,223 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:11,223 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:35:11,223 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:35:11,231 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,244 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,311 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 258 [2023-11-19 07:35:11,312 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:11,312 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:35:11,313 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:35:11,313 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:35:11,323 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,324 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,329 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,330 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,349 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,354 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,361 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,365 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,374 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:35:11,376 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:35:11,376 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:35:11,376 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:35:11,377 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (1/1) ... [2023-11-19 07:35:11,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:11,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:11,425 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:35:11,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:35:11,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:35:11,470 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:35:11,471 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:35:11,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:35:11,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:35:11,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:35:11,605 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:35:11,607 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:35:12,253 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:35:12,263 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:35:12,267 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:35:12,275 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:12 BoogieIcfgContainer [2023-11-19 07:35:12,275 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:35:12,277 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:35:12,278 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:35:12,281 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:35:12,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:35:10" (1/3) ... [2023-11-19 07:35:12,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9c8ca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:12, skipping insertion in model container [2023-11-19 07:35:12,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:11" (2/3) ... [2023-11-19 07:35:12,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9c8ca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:12, skipping insertion in model container [2023-11-19 07:35:12,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:12" (3/3) ... [2023-11-19 07:35:12,284 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pr-ci_file-81.i [2023-11-19 07:35:12,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:35:12,304 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:35:12,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:35:12,367 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;@55a9ab2a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:35:12,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:35:12,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 68 states have (on average 1.5) internal successors, (102), 69 states have internal predecessors, (102), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-19 07:35:12,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-19 07:35:12,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:12,390 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:12,391 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:12,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:12,398 INFO L85 PathProgramCache]: Analyzing trace with hash -493683205, now seen corresponding path program 1 times [2023-11-19 07:35:12,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:12,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643198209] [2023-11-19 07:35:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:12,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:12,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:12,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643198209] [2023-11-19 07:35:12,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:35:12,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815683936] [2023-11-19 07:35:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:12,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:12,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:12,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:12,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:35:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:13,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:35:13,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2023-11-19 07:35:13,227 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:13,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815683936] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:13,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:13,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:35:13,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694982810] [2023-11-19 07:35:13,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:13,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:35:13,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:13,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:35:13,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:35:13,296 INFO L87 Difference]: Start difference. First operand has 102 states, 68 states have (on average 1.5) internal successors, (102), 69 states have internal predecessors, (102), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-19 07:35:13,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:13,336 INFO L93 Difference]: Finished difference Result 196 states and 351 transitions. [2023-11-19 07:35:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:35:13,340 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) Word has length 202 [2023-11-19 07:35:13,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:13,349 INFO L225 Difference]: With dead ends: 196 [2023-11-19 07:35:13,349 INFO L226 Difference]: Without dead ends: 97 [2023-11-19 07:35:13,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 201 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 07:35:13,362 INFO L413 NwaCegarLoop]: 154 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, 154 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 07:35:13,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:35:13,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-19 07:35:13,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-11-19 07:35:13,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.4375) internal successors, (92), 64 states have internal predecessors, (92), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-19 07:35:13,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 154 transitions. [2023-11-19 07:35:13,434 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 154 transitions. Word has length 202 [2023-11-19 07:35:13,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:13,434 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 154 transitions. [2023-11-19 07:35:13,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-19 07:35:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 154 transitions. [2023-11-19 07:35:13,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-19 07:35:13,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:13,441 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:13,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:13,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:35:13,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:13,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:13,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2099268977, now seen corresponding path program 1 times [2023-11-19 07:35:13,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:13,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922549080] [2023-11-19 07:35:13,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:13,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:13,769 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:13,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676474236] [2023-11-19 07:35:13,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:13,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:13,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:13,781 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:13,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:35:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:14,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:35:14,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 750 proven. 66 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2023-11-19 07:35:14,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 24 proven. 66 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-19 07:35:14,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:14,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922549080] [2023-11-19 07:35:14,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:14,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676474236] [2023-11-19 07:35:14,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676474236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:14,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:35:14,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-19 07:35:14,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006939580] [2023-11-19 07:35:14,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:14,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:35:14,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:14,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:35:14,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:35:14,961 INFO L87 Difference]: Start difference. First operand 97 states and 154 transitions. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2023-11-19 07:35:15,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:15,801 INFO L93 Difference]: Finished difference Result 279 states and 438 transitions. [2023-11-19 07:35:15,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:35:15,802 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) Word has length 202 [2023-11-19 07:35:15,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:15,813 INFO L225 Difference]: With dead ends: 279 [2023-11-19 07:35:15,813 INFO L226 Difference]: Without dead ends: 185 [2023-11-19 07:35:15,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 393 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 07:35:15,820 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 162 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:15,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 820 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:35:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-19 07:35:15,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 101. [2023-11-19 07:35:15,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.4029850746268657) internal successors, (94), 67 states have internal predecessors, (94), 31 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-19 07:35:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 156 transitions. [2023-11-19 07:35:15,878 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 156 transitions. Word has length 202 [2023-11-19 07:35:15,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:15,881 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 156 transitions. [2023-11-19 07:35:15,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2023-11-19 07:35:15,882 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 156 transitions. [2023-11-19 07:35:15,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-19 07:35:15,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:15,894 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:15,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:16,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 07:35:16,117 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:16,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:16,118 INFO L85 PathProgramCache]: Analyzing trace with hash 99829902, now seen corresponding path program 1 times [2023-11-19 07:35:16,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:16,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561933513] [2023-11-19 07:35:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:16,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:16,173 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:16,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693277728] [2023-11-19 07:35:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:16,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:16,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:16,183 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:16,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:35:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:16,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:35:16,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-19 07:35:16,422 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:16,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:16,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561933513] [2023-11-19 07:35:16,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:16,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693277728] [2023-11-19 07:35:16,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693277728] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:16,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:16,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:35:16,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053378822] [2023-11-19 07:35:16,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:16,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:16,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:16,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:16,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:16,429 INFO L87 Difference]: Start difference. First operand 101 states and 156 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 07:35:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:16,490 INFO L93 Difference]: Finished difference Result 243 states and 376 transitions. [2023-11-19 07:35:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:16,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 203 [2023-11-19 07:35:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:16,498 INFO L225 Difference]: With dead ends: 243 [2023-11-19 07:35:16,498 INFO L226 Difference]: Without dead ends: 145 [2023-11-19 07:35:16,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:16,503 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 55 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:16,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 314 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:35:16,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-19 07:35:16,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2023-11-19 07:35:16,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 103 states have (on average 1.4368932038834952) internal successors, (148), 104 states have internal predecessors, (148), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-19 07:35:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 218 transitions. [2023-11-19 07:35:16,558 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 218 transitions. Word has length 203 [2023-11-19 07:35:16,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:16,560 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 218 transitions. [2023-11-19 07:35:16,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 07:35:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 218 transitions. [2023-11-19 07:35:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-19 07:35:16,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:16,564 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:16,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 07:35:16,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:16,788 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:16,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:16,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1874837264, now seen corresponding path program 1 times [2023-11-19 07:35:16,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:16,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851275882] [2023-11-19 07:35:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:16,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:16,849 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:16,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177600229] [2023-11-19 07:35:16,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:16,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:16,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:16,854 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:16,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:35:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:17,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:35:17,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 1268 proven. 78 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2023-11-19 07:35:17,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 96 proven. 81 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2023-11-19 07:35:17,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:17,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851275882] [2023-11-19 07:35:17,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:17,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177600229] [2023-11-19 07:35:17,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177600229] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:17,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:35:17,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-19 07:35:17,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349084937] [2023-11-19 07:35:17,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:17,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:35:17,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:17,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:35:17,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:35:17,930 INFO L87 Difference]: Start difference. First operand 142 states and 218 transitions. Second operand has 16 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 7 states have call successors, (47), 4 states have call predecessors, (47), 8 states have return successors, (48), 7 states have call predecessors, (48), 7 states have call successors, (48) [2023-11-19 07:35:18,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:18,460 INFO L93 Difference]: Finished difference Result 301 states and 449 transitions. [2023-11-19 07:35:18,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:35:18,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 7 states have call successors, (47), 4 states have call predecessors, (47), 8 states have return successors, (48), 7 states have call predecessors, (48), 7 states have call successors, (48) Word has length 203 [2023-11-19 07:35:18,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:18,464 INFO L225 Difference]: With dead ends: 301 [2023-11-19 07:35:18,465 INFO L226 Difference]: Without dead ends: 162 [2023-11-19 07:35:18,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=457, Unknown=0, NotChecked=0, Total=702 [2023-11-19 07:35:18,467 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 238 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:18,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 354 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:35:18,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-19 07:35:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2023-11-19 07:35:18,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 115 states have (on average 1.373913043478261) internal successors, (158), 116 states have internal predecessors, (158), 35 states have call successors, (35), 7 states have call predecessors, (35), 7 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-19 07:35:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 228 transitions. [2023-11-19 07:35:18,490 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 228 transitions. Word has length 203 [2023-11-19 07:35:18,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:18,492 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 228 transitions. [2023-11-19 07:35:18,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 7 states have call successors, (47), 4 states have call predecessors, (47), 8 states have return successors, (48), 7 states have call predecessors, (48), 7 states have call successors, (48) [2023-11-19 07:35:18,492 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 228 transitions. [2023-11-19 07:35:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-19 07:35:18,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:18,497 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:18,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:18,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:18,719 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:18,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:18,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1452135438, now seen corresponding path program 1 times [2023-11-19 07:35:18,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:18,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796450802] [2023-11-19 07:35:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:18,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:18,778 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:18,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941636349] [2023-11-19 07:35:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:18,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:18,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:18,784 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:18,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:35:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:19,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 07:35:19,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 132 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2023-11-19 07:35:20,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 42 proven. 135 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2023-11-19 07:35:21,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:21,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796450802] [2023-11-19 07:35:21,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:21,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941636349] [2023-11-19 07:35:21,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941636349] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:21,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:35:21,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 24 [2023-11-19 07:35:21,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240082367] [2023-11-19 07:35:21,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:21,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:35:21,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:21,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:35:21,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:35:21,300 INFO L87 Difference]: Start difference. First operand 158 states and 228 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 6 states have call successors, (62), 4 states have call predecessors, (62), 7 states have return successors, (62), 4 states have call predecessors, (62), 6 states have call successors, (62) [2023-11-19 07:35:25,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:25,439 INFO L93 Difference]: Finished difference Result 836 states and 1187 transitions. [2023-11-19 07:35:25,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-19 07:35:25,440 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 6 states have call successors, (62), 4 states have call predecessors, (62), 7 states have return successors, (62), 4 states have call predecessors, (62), 6 states have call successors, (62) Word has length 203 [2023-11-19 07:35:25,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:25,450 INFO L225 Difference]: With dead ends: 836 [2023-11-19 07:35:25,450 INFO L226 Difference]: Without dead ends: 681 [2023-11-19 07:35:25,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1168, Invalid=3524, Unknown=0, NotChecked=0, Total=4692 [2023-11-19 07:35:25,454 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 1652 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 930 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 2037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 930 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:25,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1652 Valid, 804 Invalid, 2037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [930 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 07:35:25,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2023-11-19 07:35:25,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 295. [2023-11-19 07:35:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 208 states have (on average 1.2932692307692308) internal successors, (269), 209 states have internal predecessors, (269), 66 states have call successors, (66), 20 states have call predecessors, (66), 20 states have return successors, (66), 65 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-19 07:35:25,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 401 transitions. [2023-11-19 07:35:25,523 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 401 transitions. Word has length 203 [2023-11-19 07:35:25,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:25,524 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 401 transitions. [2023-11-19 07:35:25,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 6 states have call successors, (62), 4 states have call predecessors, (62), 7 states have return successors, (62), 4 states have call predecessors, (62), 6 states have call successors, (62) [2023-11-19 07:35:25,524 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 401 transitions. [2023-11-19 07:35:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-19 07:35:25,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:25,528 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:25,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:25,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:25,749 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:25,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:25,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1177035785, now seen corresponding path program 1 times [2023-11-19 07:35:25,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:25,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680777423] [2023-11-19 07:35:25,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:25,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:25,789 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:25,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588773494] [2023-11-19 07:35:25,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:25,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:25,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:25,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:25,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:35:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:25,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:35:25,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 850 proven. 60 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-19 07:35:26,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 30 proven. 60 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-19 07:35:26,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:26,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680777423] [2023-11-19 07:35:26,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:26,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588773494] [2023-11-19 07:35:26,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588773494] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:26,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:35:26,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-19 07:35:26,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699269581] [2023-11-19 07:35:26,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:26,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:35:26,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:26,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:35:26,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:35:26,575 INFO L87 Difference]: Start difference. First operand 295 states and 401 transitions. Second operand has 12 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2023-11-19 07:35:27,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:27,203 INFO L93 Difference]: Finished difference Result 575 states and 773 transitions. [2023-11-19 07:35:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:35:27,204 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) Word has length 204 [2023-11-19 07:35:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:27,208 INFO L225 Difference]: With dead ends: 575 [2023-11-19 07:35:27,208 INFO L226 Difference]: Without dead ends: 401 [2023-11-19 07:35:27,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:35:27,210 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 166 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:27,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 528 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:35:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-11-19 07:35:27,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 388. [2023-11-19 07:35:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 279 states have (on average 1.2652329749103943) internal successors, (353), 282 states have internal predecessors, (353), 80 states have call successors, (80), 28 states have call predecessors, (80), 28 states have return successors, (80), 77 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-19 07:35:27,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 513 transitions. [2023-11-19 07:35:27,288 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 513 transitions. Word has length 204 [2023-11-19 07:35:27,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:27,289 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 513 transitions. [2023-11-19 07:35:27,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2023-11-19 07:35:27,290 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 513 transitions. [2023-11-19 07:35:27,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-19 07:35:27,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:27,294 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:27,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:27,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:27,509 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:27,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:27,509 INFO L85 PathProgramCache]: Analyzing trace with hash 452391572, now seen corresponding path program 1 times [2023-11-19 07:35:27,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:27,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409900798] [2023-11-19 07:35:27,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:27,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:27,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:27,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997987423] [2023-11-19 07:35:27,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:27,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:27,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:27,545 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:27,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:35:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:27,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:35:27,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 752 proven. 228 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2023-11-19 07:35:28,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 27 proven. 150 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2023-11-19 07:35:29,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:29,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409900798] [2023-11-19 07:35:29,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:29,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997987423] [2023-11-19 07:35:29,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997987423] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:29,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:35:29,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-11-19 07:35:29,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39198435] [2023-11-19 07:35:29,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:29,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:35:29,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:29,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:35:29,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:35:29,410 INFO L87 Difference]: Start difference. First operand 388 states and 513 transitions. Second operand has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 18 states have internal predecessors, (109), 6 states have call successors, (61), 4 states have call predecessors, (61), 8 states have return successors, (62), 5 states have call predecessors, (62), 6 states have call successors, (62) [2023-11-19 07:35:30,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:30,697 INFO L93 Difference]: Finished difference Result 824 states and 1082 transitions. [2023-11-19 07:35:30,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-19 07:35:30,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 18 states have internal predecessors, (109), 6 states have call successors, (61), 4 states have call predecessors, (61), 8 states have return successors, (62), 5 states have call predecessors, (62), 6 states have call successors, (62) Word has length 204 [2023-11-19 07:35:30,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:30,702 INFO L225 Difference]: With dead ends: 824 [2023-11-19 07:35:30,702 INFO L226 Difference]: Without dead ends: 567 [2023-11-19 07:35:30,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=564, Invalid=1416, Unknown=0, NotChecked=0, Total=1980 [2023-11-19 07:35:30,705 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 227 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:30,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 595 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:35:30,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2023-11-19 07:35:30,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 379. [2023-11-19 07:35:30,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 285 states have (on average 1.3157894736842106) internal successors, (375), 286 states have internal predecessors, (375), 66 states have call successors, (66), 27 states have call predecessors, (66), 27 states have return successors, (66), 65 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-19 07:35:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 507 transitions. [2023-11-19 07:35:30,771 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 507 transitions. Word has length 204 [2023-11-19 07:35:30,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:30,771 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 507 transitions. [2023-11-19 07:35:30,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 18 states have internal predecessors, (109), 6 states have call successors, (61), 4 states have call predecessors, (61), 8 states have return successors, (62), 5 states have call predecessors, (62), 6 states have call successors, (62) [2023-11-19 07:35:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 507 transitions. [2023-11-19 07:35:30,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-19 07:35:30,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:30,774 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:30,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:30,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:30,997 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:30,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:30,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1750850355, now seen corresponding path program 1 times [2023-11-19 07:35:30,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:30,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873721974] [2023-11-19 07:35:30,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:30,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:31,039 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:31,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803017637] [2023-11-19 07:35:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:31,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:31,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:31,041 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:31,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:35:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:31,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:35:31,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 540 proven. 75 refuted. 0 times theorem prover too weak. 1245 trivial. 0 not checked. [2023-11-19 07:35:31,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-19 07:35:31,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:31,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873721974] [2023-11-19 07:35:31,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:31,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803017637] [2023-11-19 07:35:31,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803017637] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:31,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:35:31,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2023-11-19 07:35:31,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365133700] [2023-11-19 07:35:31,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:31,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:35:31,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:31,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:35:31,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:35:31,641 INFO L87 Difference]: Start difference. First operand 379 states and 507 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 07:35:31,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:31,742 INFO L93 Difference]: Finished difference Result 628 states and 839 transitions. [2023-11-19 07:35:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:35:31,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 204 [2023-11-19 07:35:31,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:31,746 INFO L225 Difference]: With dead ends: 628 [2023-11-19 07:35:31,746 INFO L226 Difference]: Without dead ends: 380 [2023-11-19 07:35:31,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 399 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:35:31,749 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 101 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:31,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 395 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:35:31,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-11-19 07:35:31,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 349. [2023-11-19 07:35:31,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 260 states have (on average 1.2884615384615385) internal successors, (335), 260 states have internal predecessors, (335), 62 states have call successors, (62), 26 states have call predecessors, (62), 26 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-19 07:35:31,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 459 transitions. [2023-11-19 07:35:31,807 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 459 transitions. Word has length 204 [2023-11-19 07:35:31,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:31,808 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 459 transitions. [2023-11-19 07:35:31,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 07:35:31,808 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 459 transitions. [2023-11-19 07:35:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-19 07:35:31,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:31,811 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:31,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:32,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:35:32,033 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:32,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:32,033 INFO L85 PathProgramCache]: Analyzing trace with hash -510754099, now seen corresponding path program 1 times [2023-11-19 07:35:32,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:32,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007483953] [2023-11-19 07:35:32,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:32,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:32,090 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:32,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688926809] [2023-11-19 07:35:32,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:32,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:32,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:32,117 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:32,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:35:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:32,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 07:35:32,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 62 proven. 174 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-19 07:35:38,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-19 07:35:46,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:46,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007483953] [2023-11-19 07:35:46,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:46,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688926809] [2023-11-19 07:35:46,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688926809] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:46,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:35:46,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 27 [2023-11-19 07:35:46,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804224379] [2023-11-19 07:35:46,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:46,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:35:46,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:46,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:35:46,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2023-11-19 07:35:46,564 INFO L87 Difference]: Start difference. First operand 349 states and 459 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 07:35:50,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:50,911 INFO L93 Difference]: Finished difference Result 812 states and 1090 transitions. [2023-11-19 07:35:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 07:35:50,911 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 204 [2023-11-19 07:35:50,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:50,916 INFO L225 Difference]: With dead ends: 812 [2023-11-19 07:35:50,916 INFO L226 Difference]: Without dead ends: 607 [2023-11-19 07:35:50,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=557, Invalid=2095, Unknown=0, NotChecked=0, Total=2652 [2023-11-19 07:35:50,919 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 609 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:50,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 871 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 07:35:50,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2023-11-19 07:35:50,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 371. [2023-11-19 07:35:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 282 states have (on average 1.2943262411347518) internal successors, (365), 282 states have internal predecessors, (365), 62 states have call successors, (62), 26 states have call predecessors, (62), 26 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-19 07:35:50,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 489 transitions. [2023-11-19 07:35:50,999 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 489 transitions. Word has length 204 [2023-11-19 07:35:50,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:50,999 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 489 transitions. [2023-11-19 07:35:51,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 07:35:51,000 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 489 transitions. [2023-11-19 07:35:51,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-19 07:35:51,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:51,002 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:51,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:51,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 07:35:51,223 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:51,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:51,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1790068491, now seen corresponding path program 1 times [2023-11-19 07:35:51,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:51,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717812188] [2023-11-19 07:35:51,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:51,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:51,264 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:51,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648129743] [2023-11-19 07:35:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:51,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:51,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:51,266 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:51,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147f6dfa-d2c5-4a0a-9a75-6e41c17dcd6d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:35:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:51,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-19 07:35:51,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 916 proven. 228 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2023-11-19 07:35:57,464 INFO L327 TraceCheckSpWp]: Computing backward predicates...