./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-cn_file-84.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-cn_file-84.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 d18ab7936b7f9f12e95bc2d3233c22042172301d3461e91c25f779e1318fccd6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:50:58,359 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:50:58,449 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:50:58,455 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:50:58,456 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:50:58,483 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:50:58,484 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:50:58,485 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:50:58,486 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:50:58,486 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:50:58,487 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:50:58,488 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:50:58,488 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:50:58,489 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:50:58,490 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:50:58,490 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:50:58,491 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:50:58,491 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:50:58,492 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:50:58,492 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:50:58,493 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:50:58,493 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:50:58,494 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:50:58,494 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:50:58,495 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:50:58,495 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:50:58,496 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:50:58,496 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:50:58,496 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:50:58,497 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:50:58,497 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:50:58,498 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:50:58,498 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:50:58,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:50:58,499 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:50:58,500 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:50:58,500 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:50:58,501 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:50:58,501 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:50:58,501 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_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d18ab7936b7f9f12e95bc2d3233c22042172301d3461e91c25f779e1318fccd6 [2023-11-06 22:50:58,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:50:58,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:50:58,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:50:58,876 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:50:58,877 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:50:58,878 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-cn_file-84.i [2023-11-06 22:51:01,992 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:51:02,283 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:51:02,284 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-cn_file-84.i [2023-11-06 22:51:02,303 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/data/15c2aaf24/a2970b990b0c442eab687c5f8deda29a/FLAG3d1f3fcb6 [2023-11-06 22:51:02,323 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/data/15c2aaf24/a2970b990b0c442eab687c5f8deda29a [2023-11-06 22:51:02,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:51:02,336 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:51:02,340 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:51:02,340 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:51:02,346 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:51:02,347 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:51:02" (1/1) ... [2023-11-06 22:51:02,348 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53c4f2a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:02, skipping insertion in model container [2023-11-06 22:51:02,348 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:51:02" (1/1) ... [2023-11-06 22:51:02,409 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:51:02,590 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_0561b81f-588d-4aa9-a4b7-1d252305893a/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-cn_file-84.i[919,932] [2023-11-06 22:51:02,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:51:02,706 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:51:02,717 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_0561b81f-588d-4aa9-a4b7-1d252305893a/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-cn_file-84.i[919,932] [2023-11-06 22:51:02,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:51:02,792 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:51:02,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:02 WrapperNode [2023-11-06 22:51:02,792 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:51:02,794 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:51:02,794 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:51:02,794 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:51:02,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:02" (1/1) ... [2023-11-06 22:51:02,823 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:02" (1/1) ... [2023-11-06 22:51:02,900 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 314 [2023-11-06 22:51:02,900 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:51:02,901 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:51:02,901 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:51:02,902 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:51:02,912 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:02" (1/1) ... [2023-11-06 22:51:02,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:02" (1/1) ... [2023-11-06 22:51:02,919 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:02" (1/1) ... [2023-11-06 22:51:02,920 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:02" (1/1) ... [2023-11-06 22:51:02,941 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:02" (1/1) ... [2023-11-06 22:51:02,946 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:02" (1/1) ... [2023-11-06 22:51:02,952 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:02" (1/1) ... [2023-11-06 22:51:02,956 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:02" (1/1) ... [2023-11-06 22:51:02,965 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:51:02,967 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:51:02,967 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:51:02,967 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:51:02,968 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:02" (1/1) ... [2023-11-06 22:51:02,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:51:02,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:03,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:51:03,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:51:03,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:51:03,074 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:51:03,074 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:51:03,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:51:03,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:51:03,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:51:03,233 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:51:03,235 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:51:04,010 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:51:04,019 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:51:04,020 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:51:04,024 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:51:04 BoogieIcfgContainer [2023-11-06 22:51:04,024 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:51:04,027 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:51:04,028 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:51:04,031 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:51:04,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:51:02" (1/3) ... [2023-11-06 22:51:04,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1c7c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:51:04, skipping insertion in model container [2023-11-06 22:51:04,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:02" (2/3) ... [2023-11-06 22:51:04,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1c7c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:51:04, skipping insertion in model container [2023-11-06 22:51:04,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:51:04" (3/3) ... [2023-11-06 22:51:04,035 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pr-cn_file-84.i [2023-11-06 22:51:04,056 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:51:04,057 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:51:04,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:51:04,147 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=LoopsAndPotentialCycles, 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;@be053fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:51:04,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:51:04,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 83 states have (on average 1.4216867469879517) internal successors, (118), 84 states have internal predecessors, (118), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-06 22:51:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-11-06 22:51:04,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:04,206 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:04,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:04,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:04,217 INFO L85 PathProgramCache]: Analyzing trace with hash -816327322, now seen corresponding path program 1 times [2023-11-06 22:51:04,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:04,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325252469] [2023-11-06 22:51:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:04,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:04,502 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:51:04,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649419149] [2023-11-06 22:51:04,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:04,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:04,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:04,515 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:04,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:51:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:04,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:51:04,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-06 22:51:28,202 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:51:28,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:28,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325252469] [2023-11-06 22:51:28,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:51:28,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649419149] [2023-11-06 22:51:28,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649419149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:51:28,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:51:28,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:51:28,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712251652] [2023-11-06 22:51:28,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:51:28,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:51:28,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:28,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:51:28,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:51:28,255 INFO L87 Difference]: Start difference. First operand has 137 states, 83 states have (on average 1.4216867469879517) internal successors, (118), 84 states have internal predecessors, (118), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:51:34,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:34,201 INFO L93 Difference]: Finished difference Result 311 states and 558 transitions. [2023-11-06 22:51:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:51:34,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 316 [2023-11-06 22:51:34,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:34,225 INFO L225 Difference]: With dead ends: 311 [2023-11-06 22:51:34,228 INFO L226 Difference]: Without dead ends: 177 [2023-11-06 22:51:34,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:51:34,242 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 159 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:34,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 791 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 22:51:34,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-06 22:51:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2023-11-06 22:51:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 116 states have (on average 1.4137931034482758) internal successors, (164), 117 states have internal predecessors, (164), 55 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (55), 54 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-06 22:51:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 274 transitions. [2023-11-06 22:51:34,343 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 274 transitions. Word has length 316 [2023-11-06 22:51:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:34,346 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 274 transitions. [2023-11-06 22:51:34,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:51:34,347 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 274 transitions. [2023-11-06 22:51:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2023-11-06 22:51:34,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:34,357 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:34,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:34,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:51:34,565 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:34,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:34,566 INFO L85 PathProgramCache]: Analyzing trace with hash -854032307, now seen corresponding path program 1 times [2023-11-06 22:51:34,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:34,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984855820] [2023-11-06 22:51:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:34,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:34,678 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:51:34,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102426730] [2023-11-06 22:51:34,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:34,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:34,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:34,681 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:34,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:51:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:34,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:51:34,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-06 22:51:35,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:51:35,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:35,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984855820] [2023-11-06 22:51:35,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:51:35,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102426730] [2023-11-06 22:51:35,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102426730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:51:35,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:51:35,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:51:35,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947972918] [2023-11-06 22:51:35,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:51:35,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:51:35,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:35,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:51:35,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:51:35,720 INFO L87 Difference]: Start difference. First operand 174 states and 274 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:51:35,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:35,985 INFO L93 Difference]: Finished difference Result 395 states and 615 transitions. [2023-11-06 22:51:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:51:35,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 317 [2023-11-06 22:51:35,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:35,993 INFO L225 Difference]: With dead ends: 395 [2023-11-06 22:51:35,993 INFO L226 Difference]: Without dead ends: 224 [2023-11-06 22:51:35,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:51:35,996 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 84 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:35,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 1021 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:51:35,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-11-06 22:51:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2023-11-06 22:51:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 156 states have (on average 1.4166666666666667) internal successors, (221), 159 states have internal predecessors, (221), 59 states have call successors, (59), 4 states have call predecessors, (59), 4 states have return successors, (59), 56 states have call predecessors, (59), 59 states have call successors, (59) [2023-11-06 22:51:36,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 339 transitions. [2023-11-06 22:51:36,042 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 339 transitions. Word has length 317 [2023-11-06 22:51:36,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:36,044 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 339 transitions. [2023-11-06 22:51:36,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:51:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 339 transitions. [2023-11-06 22:51:36,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2023-11-06 22:51:36,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:36,049 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:36,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:51:36,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:36,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:36,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:36,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1276734133, now seen corresponding path program 1 times [2023-11-06 22:51:36,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:36,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243302074] [2023-11-06 22:51:36,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:36,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:36,343 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:51:36,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142322228] [2023-11-06 22:51:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:36,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:36,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:36,346 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:36,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:51:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:36,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:51:36,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 438 proven. 144 refuted. 0 times theorem prover too weak. 4518 trivial. 0 not checked. [2023-11-06 22:51:37,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 6 proven. 144 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-06 22:51:37,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:37,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243302074] [2023-11-06 22:51:37,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:51:37,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142322228] [2023-11-06 22:51:37,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142322228] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:37,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:51:37,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 22:51:37,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159208962] [2023-11-06 22:51:37,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:37,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:51:37,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:37,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:51:37,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:51:37,328 INFO L87 Difference]: Start difference. First operand 220 states and 339 transitions. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 3 states have call successors, (99), 2 states have call predecessors, (99), 4 states have return successors, (100), 3 states have call predecessors, (100), 3 states have call successors, (100) [2023-11-06 22:51:37,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:37,978 INFO L93 Difference]: Finished difference Result 405 states and 619 transitions. [2023-11-06 22:51:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:51:37,980 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 3 states have call successors, (99), 2 states have call predecessors, (99), 4 states have return successors, (100), 3 states have call predecessors, (100), 3 states have call successors, (100) Word has length 317 [2023-11-06 22:51:37,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:37,984 INFO L225 Difference]: With dead ends: 405 [2023-11-06 22:51:37,984 INFO L226 Difference]: Without dead ends: 196 [2023-11-06 22:51:37,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 624 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:51:37,987 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 153 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:37,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 393 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:51:37,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-06 22:51:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2023-11-06 22:51:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 130 states have (on average 1.3461538461538463) internal successors, (175), 132 states have internal predecessors, (175), 57 states have call successors, (57), 6 states have call predecessors, (57), 6 states have return successors, (57), 55 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-06 22:51:38,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 289 transitions. [2023-11-06 22:51:38,030 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 289 transitions. Word has length 317 [2023-11-06 22:51:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:38,032 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 289 transitions. [2023-11-06 22:51:38,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 3 states have call successors, (99), 2 states have call predecessors, (99), 4 states have return successors, (100), 3 states have call predecessors, (100), 3 states have call successors, (100) [2023-11-06 22:51:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 289 transitions. [2023-11-06 22:51:38,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2023-11-06 22:51:38,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:38,038 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:38,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:38,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:38,247 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:38,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:38,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2130786113, now seen corresponding path program 1 times [2023-11-06 22:51:38,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:38,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179164836] [2023-11-06 22:51:38,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:38,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:38,329 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:51:38,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358457065] [2023-11-06 22:51:38,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:38,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:38,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:38,332 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:38,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:51:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:38,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:51:38,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-06 22:51:40,346 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:51:40,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:40,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179164836] [2023-11-06 22:51:40,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:51:40,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358457065] [2023-11-06 22:51:40,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358457065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:51:40,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:51:40,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 22:51:40,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039437899] [2023-11-06 22:51:40,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:51:40,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:51:40,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:40,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:51:40,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:51:40,355 INFO L87 Difference]: Start difference. First operand 194 states and 289 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:51:41,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:41,133 INFO L93 Difference]: Finished difference Result 547 states and 819 transitions. [2023-11-06 22:51:41,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:51:41,134 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 318 [2023-11-06 22:51:41,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:41,138 INFO L225 Difference]: With dead ends: 547 [2023-11-06 22:51:41,139 INFO L226 Difference]: Without dead ends: 364 [2023-11-06 22:51:41,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:51:41,141 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 190 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:41,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 1032 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:51:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-11-06 22:51:41,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 250. [2023-11-06 22:51:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 186 states have (on average 1.413978494623656) internal successors, (263), 188 states have internal predecessors, (263), 57 states have call successors, (57), 6 states have call predecessors, (57), 6 states have return successors, (57), 55 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-06 22:51:41,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 377 transitions. [2023-11-06 22:51:41,204 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 377 transitions. Word has length 318 [2023-11-06 22:51:41,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:41,206 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 377 transitions. [2023-11-06 22:51:41,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:51:41,206 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 377 transitions. [2023-11-06 22:51:41,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2023-11-06 22:51:41,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:41,211 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:41,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:41,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:41,418 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:41,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:41,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1906015745, now seen corresponding path program 1 times [2023-11-06 22:51:41,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:41,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29312630] [2023-11-06 22:51:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:41,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:41,487 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:51:41,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537819085] [2023-11-06 22:51:41,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:41,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:41,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:41,490 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:41,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:51:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:41,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:51:41,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-06 22:51:42,635 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:51:42,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:42,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29312630] [2023-11-06 22:51:42,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:51:42,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537819085] [2023-11-06 22:51:42,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537819085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:51:42,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:51:42,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 22:51:42,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126632199] [2023-11-06 22:51:42,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:51:42,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:51:42,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:42,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:51:42,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:51:42,655 INFO L87 Difference]: Start difference. First operand 250 states and 377 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:51:43,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:43,280 INFO L93 Difference]: Finished difference Result 609 states and 913 transitions. [2023-11-06 22:51:43,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:51:43,281 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 318 [2023-11-06 22:51:43,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:43,286 INFO L225 Difference]: With dead ends: 609 [2023-11-06 22:51:43,286 INFO L226 Difference]: Without dead ends: 370 [2023-11-06 22:51:43,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:51:43,289 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 163 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:43,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1137 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:51:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-11-06 22:51:43,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 250. [2023-11-06 22:51:43,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 186 states have (on average 1.413978494623656) internal successors, (263), 188 states have internal predecessors, (263), 57 states have call successors, (57), 6 states have call predecessors, (57), 6 states have return successors, (57), 55 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-06 22:51:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 377 transitions. [2023-11-06 22:51:43,326 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 377 transitions. Word has length 318 [2023-11-06 22:51:43,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:43,327 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 377 transitions. [2023-11-06 22:51:43,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:51:43,328 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 377 transitions. [2023-11-06 22:51:43,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2023-11-06 22:51:43,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:43,331 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:43,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:43,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:43,538 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:43,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:43,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1119668863, now seen corresponding path program 1 times [2023-11-06 22:51:43,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:43,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160750462] [2023-11-06 22:51:43,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:43,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:43,618 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:51:43,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651954694] [2023-11-06 22:51:43,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:43,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:43,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:43,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:43,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:51:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:43,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:51:43,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 1752 proven. 258 refuted. 0 times theorem prover too weak. 3090 trivial. 0 not checked. [2023-11-06 22:51:46,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-06 22:52:02,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:02,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160750462] [2023-11-06 22:52:02,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:02,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651954694] [2023-11-06 22:52:02,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651954694] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:02,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:52:02,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 21 [2023-11-06 22:52:02,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040488046] [2023-11-06 22:52:02,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:02,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:52:02,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:02,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:52:02,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:52:02,010 INFO L87 Difference]: Start difference. First operand 250 states and 377 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:52:10,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:10,420 INFO L93 Difference]: Finished difference Result 601 states and 904 transitions. [2023-11-06 22:52:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:52:10,422 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 318 [2023-11-06 22:52:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:10,426 INFO L225 Difference]: With dead ends: 601 [2023-11-06 22:52:10,426 INFO L226 Difference]: Without dead ends: 362 [2023-11-06 22:52:10,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:52:10,429 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 164 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:10,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1419 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-06 22:52:10,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-11-06 22:52:10,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 254. [2023-11-06 22:52:10,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 190 states have (on average 1.4157894736842105) internal successors, (269), 192 states have internal predecessors, (269), 57 states have call successors, (57), 6 states have call predecessors, (57), 6 states have return successors, (57), 55 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-06 22:52:10,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 383 transitions. [2023-11-06 22:52:10,468 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 383 transitions. Word has length 318 [2023-11-06 22:52:10,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:10,470 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 383 transitions. [2023-11-06 22:52:10,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:52:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 383 transitions. [2023-11-06 22:52:10,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2023-11-06 22:52:10,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:10,474 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:10,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 22:52:10,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:10,681 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:10,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:10,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1377834301, now seen corresponding path program 1 times [2023-11-06 22:52:10,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:10,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114388694] [2023-11-06 22:52:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:10,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:10,732 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:10,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629038317] [2023-11-06 22:52:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:10,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:10,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:10,734 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:10,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:52:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:11,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 22:52:11,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2126 proven. 462 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2023-11-06 22:52:14,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-06 22:52:26,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:26,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114388694] [2023-11-06 22:52:26,794 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:26,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629038317] [2023-11-06 22:52:26,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629038317] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:26,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:52:26,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [22] total 29 [2023-11-06 22:52:26,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891257613] [2023-11-06 22:52:26,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:26,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:52:26,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:26,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:52:26,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:52:26,798 INFO L87 Difference]: Start difference. First operand 254 states and 383 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:52:33,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:33,880 INFO L93 Difference]: Finished difference Result 601 states and 904 transitions. [2023-11-06 22:52:33,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:52:33,889 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 318 [2023-11-06 22:52:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:33,892 INFO L225 Difference]: With dead ends: 601 [2023-11-06 22:52:33,893 INFO L226 Difference]: Without dead ends: 358 [2023-11-06 22:52:33,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:52:33,896 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 180 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:33,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 1449 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-06 22:52:33,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-11-06 22:52:33,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 250. [2023-11-06 22:52:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 186 states have (on average 1.413978494623656) internal successors, (263), 188 states have internal predecessors, (263), 57 states have call successors, (57), 6 states have call predecessors, (57), 6 states have return successors, (57), 55 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-06 22:52:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 377 transitions. [2023-11-06 22:52:33,945 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 377 transitions. Word has length 318 [2023-11-06 22:52:33,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:33,945 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 377 transitions. [2023-11-06 22:52:33,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:52:33,946 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 377 transitions. [2023-11-06 22:52:33,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-06 22:52:33,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:33,949 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:33,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:34,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:34,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:34,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:34,157 INFO L85 PathProgramCache]: Analyzing trace with hash -110007889, now seen corresponding path program 1 times [2023-11-06 22:52:34,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:34,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641448100] [2023-11-06 22:52:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:34,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:34,209 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:34,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166073558] [2023-11-06 22:52:34,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:34,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:34,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:34,211 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:34,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:52:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:34,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:52:34,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-06 22:52:34,547 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:34,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:34,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641448100] [2023-11-06 22:52:34,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:34,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166073558] [2023-11-06 22:52:34,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166073558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:34,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:34,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:52:34,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679722638] [2023-11-06 22:52:34,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:34,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:52:34,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:34,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:52:34,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:52:34,551 INFO L87 Difference]: Start difference. First operand 250 states and 377 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:52:34,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:34,693 INFO L93 Difference]: Finished difference Result 579 states and 873 transitions. [2023-11-06 22:52:34,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:52:34,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 319 [2023-11-06 22:52:34,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:34,698 INFO L225 Difference]: With dead ends: 579 [2023-11-06 22:52:34,698 INFO L226 Difference]: Without dead ends: 340 [2023-11-06 22:52:34,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:52:34,700 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 53 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:34,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 373 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:52:34,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-11-06 22:52:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 310. [2023-11-06 22:52:34,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 246 states have (on average 1.443089430894309) internal successors, (355), 248 states have internal predecessors, (355), 57 states have call successors, (57), 6 states have call predecessors, (57), 6 states have return successors, (57), 55 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-06 22:52:34,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 469 transitions. [2023-11-06 22:52:34,747 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 469 transitions. Word has length 319 [2023-11-06 22:52:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:34,748 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 469 transitions. [2023-11-06 22:52:34,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:52:34,749 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 469 transitions. [2023-11-06 22:52:34,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-06 22:52:34,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:34,752 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:34,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:34,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:34,960 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:34,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:34,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1407496589, now seen corresponding path program 1 times [2023-11-06 22:52:34,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:34,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865350324] [2023-11-06 22:52:34,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:34,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:35,008 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:35,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806308464] [2023-11-06 22:52:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:35,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:35,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:35,010 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:35,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:52:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:35,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:52:35,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-06 22:52:41,909 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:41,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:41,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865350324] [2023-11-06 22:52:41,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:41,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806308464] [2023-11-06 22:52:41,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806308464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:41,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:41,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 22:52:41,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039224874] [2023-11-06 22:52:41,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:41,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:52:41,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:41,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:52:41,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:52:41,913 INFO L87 Difference]: Start difference. First operand 310 states and 469 transitions. Second operand has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:52:47,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:47,302 INFO L93 Difference]: Finished difference Result 790 states and 1179 transitions. [2023-11-06 22:52:47,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:52:47,303 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 319 [2023-11-06 22:52:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:47,307 INFO L225 Difference]: With dead ends: 790 [2023-11-06 22:52:47,308 INFO L226 Difference]: Without dead ends: 483 [2023-11-06 22:52:47,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:52:47,310 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 187 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:47,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1618 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-06 22:52:47,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-11-06 22:52:47,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 347. [2023-11-06 22:52:47,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 283 states have (on average 1.4664310954063604) internal successors, (415), 285 states have internal predecessors, (415), 57 states have call successors, (57), 6 states have call predecessors, (57), 6 states have return successors, (57), 55 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-06 22:52:47,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 529 transitions. [2023-11-06 22:52:47,362 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 529 transitions. Word has length 319 [2023-11-06 22:52:47,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:47,363 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 529 transitions. [2023-11-06 22:52:47,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:52:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 529 transitions. [2023-11-06 22:52:47,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-06 22:52:47,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:47,367 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:47,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:47,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:47,567 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:47,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:47,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1665662027, now seen corresponding path program 1 times [2023-11-06 22:52:47,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:47,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98943407] [2023-11-06 22:52:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:47,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:47,609 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:47,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612371129] [2023-11-06 22:52:47,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:47,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:47,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:47,611 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:47,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:52:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:47,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:52:47,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-06 22:52:54,323 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:54,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:54,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98943407] [2023-11-06 22:52:54,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:54,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612371129] [2023-11-06 22:52:54,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612371129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:54,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:54,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 22:52:54,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402154079] [2023-11-06 22:52:54,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:54,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:52:54,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:54,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:52:54,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:52:54,326 INFO L87 Difference]: Start difference. First operand 347 states and 529 transitions. Second operand has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:53:02,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:02,860 INFO L93 Difference]: Finished difference Result 827 states and 1237 transitions. [2023-11-06 22:53:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:53:02,861 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 319 [2023-11-06 22:53:02,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:02,865 INFO L225 Difference]: With dead ends: 827 [2023-11-06 22:53:02,865 INFO L226 Difference]: Without dead ends: 483 [2023-11-06 22:53:02,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:53:02,867 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 227 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:02,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 1497 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-11-06 22:53:02,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-11-06 22:53:02,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 343. [2023-11-06 22:53:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 279 states have (on average 1.4659498207885304) internal successors, (409), 281 states have internal predecessors, (409), 57 states have call successors, (57), 6 states have call predecessors, (57), 6 states have return successors, (57), 55 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-06 22:53:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 523 transitions. [2023-11-06 22:53:02,914 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 523 transitions. Word has length 319 [2023-11-06 22:53:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:02,915 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 523 transitions. [2023-11-06 22:53:02,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:53:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 523 transitions. [2023-11-06 22:53:02,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-06 22:53:02,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:02,919 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:02,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:03,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:53:03,126 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:03,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:03,126 INFO L85 PathProgramCache]: Analyzing trace with hash 396379339, now seen corresponding path program 1 times [2023-11-06 22:53:03,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:03,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47611344] [2023-11-06 22:53:03,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:03,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:03,169 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:03,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678953708] [2023-11-06 22:53:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:03,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:03,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:03,171 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:03,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:53:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:03,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:53:03,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:04,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 1770 proven. 240 refuted. 0 times theorem prover too weak. 3090 trivial. 0 not checked. [2023-11-06 22:53:04,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 54 proven. 243 refuted. 0 times theorem prover too weak. 4803 trivial. 0 not checked. [2023-11-06 22:53:05,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:05,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47611344] [2023-11-06 22:53:05,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:05,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678953708] [2023-11-06 22:53:05,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678953708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:05,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:53:05,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-06 22:53:05,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867968993] [2023-11-06 22:53:05,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:05,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:53:05,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:05,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:53:05,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:53:05,428 INFO L87 Difference]: Start difference. First operand 343 states and 523 transitions. Second operand has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 6 states have call successors, (102), 4 states have call predecessors, (102), 8 states have return successors, (102), 6 states have call predecessors, (102), 6 states have call successors, (102) [2023-11-06 22:53:07,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:07,359 INFO L93 Difference]: Finished difference Result 1755 states and 2632 transitions. [2023-11-06 22:53:07,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:53:07,360 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 6 states have call successors, (102), 4 states have call predecessors, (102), 8 states have return successors, (102), 6 states have call predecessors, (102), 6 states have call successors, (102) Word has length 319 [2023-11-06 22:53:07,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:07,370 INFO L225 Difference]: With dead ends: 1755 [2023-11-06 22:53:07,370 INFO L226 Difference]: Without dead ends: 1415 [2023-11-06 22:53:07,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 626 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=543, Invalid=1097, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:53:07,373 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 952 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:07,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 1103 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 22:53:07,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2023-11-06 22:53:07,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 871. [2023-11-06 22:53:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 741 states have (on average 1.4777327935222673) internal successors, (1095), 745 states have internal predecessors, (1095), 114 states have call successors, (114), 15 states have call predecessors, (114), 15 states have return successors, (114), 110 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-06 22:53:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1323 transitions. [2023-11-06 22:53:07,515 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1323 transitions. Word has length 319 [2023-11-06 22:53:07,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:07,516 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 1323 transitions. [2023-11-06 22:53:07,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 6 states have call successors, (102), 4 states have call predecessors, (102), 8 states have return successors, (102), 6 states have call predecessors, (102), 6 states have call successors, (102) [2023-11-06 22:53:07,516 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1323 transitions. [2023-11-06 22:53:07,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-06 22:53:07,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:07,520 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:07,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:07,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:53:07,728 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:07,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:07,729 INFO L85 PathProgramCache]: Analyzing trace with hash 705896715, now seen corresponding path program 1 times [2023-11-06 22:53:07,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:07,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967612633] [2023-11-06 22:53:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:07,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:07,770 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:07,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724042395] [2023-11-06 22:53:07,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:07,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:07,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:07,772 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:07,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:53:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:08,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:53:08,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-06 22:53:09,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:09,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:09,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967612633] [2023-11-06 22:53:09,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:09,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724042395] [2023-11-06 22:53:09,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724042395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:09,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:09,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 22:53:09,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280155926] [2023-11-06 22:53:09,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:09,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:53:09,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:09,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:53:09,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:53:09,558 INFO L87 Difference]: Start difference. First operand 871 states and 1323 transitions. Second operand has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:53:10,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:10,550 INFO L93 Difference]: Finished difference Result 1680 states and 2519 transitions. [2023-11-06 22:53:10,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:53:10,551 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 319 [2023-11-06 22:53:10,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:10,559 INFO L225 Difference]: With dead ends: 1680 [2023-11-06 22:53:10,559 INFO L226 Difference]: Without dead ends: 1153 [2023-11-06 22:53:10,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:53:10,561 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 199 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:10,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 1668 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:53:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2023-11-06 22:53:10,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 879. [2023-11-06 22:53:10,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 749 states have (on average 1.4779706275033377) internal successors, (1107), 753 states have internal predecessors, (1107), 114 states have call successors, (114), 15 states have call predecessors, (114), 15 states have return successors, (114), 110 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-06 22:53:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1335 transitions. [2023-11-06 22:53:10,681 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1335 transitions. Word has length 319 [2023-11-06 22:53:10,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:10,682 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1335 transitions. [2023-11-06 22:53:10,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:53:10,682 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1335 transitions. [2023-11-06 22:53:10,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-06 22:53:10,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:10,687 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:10,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:10,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:53:10,897 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:10,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:10,897 INFO L85 PathProgramCache]: Analyzing trace with hash 964062153, now seen corresponding path program 1 times [2023-11-06 22:53:10,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:10,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870653158] [2023-11-06 22:53:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:10,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:10,940 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:10,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561779964] [2023-11-06 22:53:10,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:10,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:10,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:10,943 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:10,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:53:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:11,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:53:11,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-06 22:53:12,057 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:12,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:12,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870653158] [2023-11-06 22:53:12,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:12,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561779964] [2023-11-06 22:53:12,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561779964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:12,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:12,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-06 22:53:12,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863930247] [2023-11-06 22:53:12,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:12,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:53:12,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:12,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:53:12,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:53:12,061 INFO L87 Difference]: Start difference. First operand 879 states and 1335 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:53:12,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:12,810 INFO L93 Difference]: Finished difference Result 1688 states and 2527 transitions. [2023-11-06 22:53:12,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:53:12,811 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 319 [2023-11-06 22:53:12,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:12,820 INFO L225 Difference]: With dead ends: 1688 [2023-11-06 22:53:12,820 INFO L226 Difference]: Without dead ends: 1153 [2023-11-06 22:53:12,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:53:12,823 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 296 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:12,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 1601 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:53:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2023-11-06 22:53:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 807. [2023-11-06 22:53:12,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 677 states have (on average 1.463810930576071) internal successors, (991), 681 states have internal predecessors, (991), 114 states have call successors, (114), 15 states have call predecessors, (114), 15 states have return successors, (114), 110 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-06 22:53:12,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1219 transitions. [2023-11-06 22:53:12,938 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1219 transitions. Word has length 319 [2023-11-06 22:53:12,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:12,939 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 1219 transitions. [2023-11-06 22:53:12,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:53:12,940 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1219 transitions. [2023-11-06 22:53:12,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-06 22:53:12,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:12,944 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:12,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:13,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:53:13,152 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:13,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:13,153 INFO L85 PathProgramCache]: Analyzing trace with hash -305220535, now seen corresponding path program 1 times [2023-11-06 22:53:13,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:13,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702104185] [2023-11-06 22:53:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:13,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:13,194 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:13,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564799913] [2023-11-06 22:53:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:13,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:13,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:13,196 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:13,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:53:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:13,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:53:13,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 1752 proven. 258 refuted. 0 times theorem prover too weak. 3090 trivial. 0 not checked. [2023-11-06 22:53:16,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-06 22:53:34,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:34,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702104185] [2023-11-06 22:53:34,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:34,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564799913] [2023-11-06 22:53:34,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564799913] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:34,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:53:34,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-06 22:53:34,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943905202] [2023-11-06 22:53:34,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:34,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:53:34,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:34,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:53:34,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:53:34,903 INFO L87 Difference]: Start difference. First operand 807 states and 1219 transitions. Second operand has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:53:40,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:53:42,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:53:44,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:53:46,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:54:07,426 WARN L293 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 144 DAG size of output: 142 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:54:18,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:54:24,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:54:26,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:54:30,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:54:32,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:54:32,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:32,867 INFO L93 Difference]: Finished difference Result 1632 states and 2434 transitions. [2023-11-06 22:54:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:54:32,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 319 [2023-11-06 22:54:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:32,874 INFO L225 Difference]: With dead ends: 1632 [2023-11-06 22:54:32,875 INFO L226 Difference]: Without dead ends: 1169 [2023-11-06 22:54:32,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=161, Invalid=768, Unknown=1, NotChecked=0, Total=930 [2023-11-06 22:54:32,877 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 285 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 3 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:32,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1801 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 370 Invalid, 9 Unknown, 0 Unchecked, 23.5s Time] [2023-11-06 22:54:32,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2023-11-06 22:54:32,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 879. [2023-11-06 22:54:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 749 states have (on average 1.4779706275033377) internal successors, (1107), 753 states have internal predecessors, (1107), 114 states have call successors, (114), 15 states have call predecessors, (114), 15 states have return successors, (114), 110 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-06 22:54:32,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1335 transitions. [2023-11-06 22:54:32,992 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1335 transitions. Word has length 319 [2023-11-06 22:54:32,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:32,993 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1335 transitions. [2023-11-06 22:54:32,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-06 22:54:32,993 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1335 transitions. [2023-11-06 22:54:32,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-06 22:54:32,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:32,997 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:33,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:33,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:54:33,198 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:54:33,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:33,199 INFO L85 PathProgramCache]: Analyzing trace with hash -47055097, now seen corresponding path program 1 times [2023-11-06 22:54:33,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:33,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266098802] [2023-11-06 22:54:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:33,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:33,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:54:33,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546132366] [2023-11-06 22:54:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:33,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:33,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:33,239 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:33,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0561b81f-588d-4aa9-a4b7-1d252305893a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:54:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:33,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:54:33,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 1752 proven. 258 refuted. 0 times theorem prover too weak. 3090 trivial. 0 not checked. [2023-11-06 22:54:35,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-06 22:55:02,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:02,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266098802] [2023-11-06 22:55:02,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:55:02,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546132366] [2023-11-06 22:55:02,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546132366] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:02,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:55:02,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 27 [2023-11-06 22:55:02,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850138314] [2023-11-06 22:55:02,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:55:02,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:55:02,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:02,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:55:02,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:55:02,009 INFO L87 Difference]: Start difference. First operand 879 states and 1335 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51)