./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep40-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep40-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f09ee736f3dbb8dbc36f75a04671608fd1c3014086677159a28111a32a84bd34 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:19:26,089 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:19:26,172 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:19:26,178 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:19:26,178 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:19:26,201 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:19:26,202 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:19:26,203 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:19:26,204 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:19:26,204 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:19:26,205 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:19:26,205 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:19:26,206 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:19:26,207 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:19:26,208 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:19:26,208 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:19:26,209 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:19:26,210 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:19:26,210 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:19:26,211 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:19:26,212 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:19:26,212 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:19:26,213 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:19:26,214 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:19:26,214 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:19:26,215 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:19:26,215 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:19:26,216 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:19:26,217 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:19:26,217 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:19:26,218 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:19:26,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:19:26,219 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:19:26,219 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:19:26,220 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:19:26,220 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:19:26,220 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:19:26,221 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:19:26,221 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:19:26,221 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:19:26,222 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:19:26,222 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:19:26,223 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_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f09ee736f3dbb8dbc36f75a04671608fd1c3014086677159a28111a32a84bd34 [2023-11-21 22:19:26,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:19:26,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:19:26,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:19:26,528 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:19:26,528 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:19:26,530 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/reducercommutativity/sep40-1.i [2023-11-21 22:19:29,597 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:19:29,873 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:19:29,875 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/sv-benchmarks/c/reducercommutativity/sep40-1.i [2023-11-21 22:19:29,884 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/data/84e90af38/af991a137eda47f2ac479eb336bdfdea/FLAGdcddb62a3 [2023-11-21 22:19:29,905 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/data/84e90af38/af991a137eda47f2ac479eb336bdfdea [2023-11-21 22:19:29,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:19:29,914 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:19:29,917 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:19:29,918 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:19:29,923 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:19:29,925 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:19:29" (1/1) ... [2023-11-21 22:19:29,927 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1beb7dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:29, skipping insertion in model container [2023-11-21 22:19:29,927 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:19:29" (1/1) ... [2023-11-21 22:19:29,954 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:19:30,216 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_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/sv-benchmarks/c/reducercommutativity/sep40-1.i[1293,1306] [2023-11-21 22:19:30,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:19:30,231 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:19:30,255 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_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/sv-benchmarks/c/reducercommutativity/sep40-1.i[1293,1306] [2023-11-21 22:19:30,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:19:30,272 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:19:30,273 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:30 WrapperNode [2023-11-21 22:19:30,273 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:19:30,274 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:19:30,274 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:19:30,274 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:19:30,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:30" (1/1) ... [2023-11-21 22:19:30,289 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:30" (1/1) ... [2023-11-21 22:19:30,309 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-21 22:19:30,309 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:19:30,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:19:30,310 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:19:30,311 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:19:30,323 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:30" (1/1) ... [2023-11-21 22:19:30,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:30" (1/1) ... [2023-11-21 22:19:30,325 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:30" (1/1) ... [2023-11-21 22:19:30,336 INFO L187 HeapSplitter]: Split 12 memory accesses to 2 slices as follows [2, 10] [2023-11-21 22:19:30,337 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:30" (1/1) ... [2023-11-21 22:19:30,337 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:30" (1/1) ... [2023-11-21 22:19:30,344 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:30" (1/1) ... [2023-11-21 22:19:30,348 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:30" (1/1) ... [2023-11-21 22:19:30,349 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:30" (1/1) ... [2023-11-21 22:19:30,351 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:30" (1/1) ... [2023-11-21 22:19:30,353 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:19:30,354 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:19:30,354 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:19:30,355 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:19:30,355 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:30" (1/1) ... [2023-11-21 22:19:30,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:19:30,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:30,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:19:30,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:19:30,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:19:30,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:19:30,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 22:19:30,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:19:30,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-21 22:19:30,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-21 22:19:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:19:30,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:19:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-21 22:19:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-21 22:19:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:19:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-11-21 22:19:30,441 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-11-21 22:19:30,522 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:19:30,524 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:19:30,710 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:19:30,836 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:19:30,839 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 22:19:30,841 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:19:30 BoogieIcfgContainer [2023-11-21 22:19:30,842 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:19:30,845 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:19:30,846 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:19:30,849 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:19:30,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:19:29" (1/3) ... [2023-11-21 22:19:30,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e73a098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:19:30, skipping insertion in model container [2023-11-21 22:19:30,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:30" (2/3) ... [2023-11-21 22:19:30,852 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e73a098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:19:30, skipping insertion in model container [2023-11-21 22:19:30,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:19:30" (3/3) ... [2023-11-21 22:19:30,853 INFO L112 eAbstractionObserver]: Analyzing ICFG sep40-1.i [2023-11-21 22:19:30,875 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:19:30,875 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:19:30,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:19:30,941 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@72cf45d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:19:30,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:19:30,945 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:19:30,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 22:19:30,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:30,953 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:30,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:30,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:30,959 INFO L85 PathProgramCache]: Analyzing trace with hash -673086435, now seen corresponding path program 1 times [2023-11-21 22:19:30,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:30,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019380655] [2023-11-21 22:19:30,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:30,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:31,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:19:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:31,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:19:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:31,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:19:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:19:31,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:31,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019380655] [2023-11-21 22:19:31,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019380655] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:31,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799886615] [2023-11-21 22:19:31,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:31,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:31,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:31,408 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:31,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:19:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:31,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:19:31,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 22:19:31,627 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:19:31,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799886615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:31,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:19:31,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 22:19:31,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241984166] [2023-11-21 22:19:31,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:31,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:19:31,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:31,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:19:31,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:19:31,678 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 22:19:31,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:31,720 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-11-21 22:19:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:19:31,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2023-11-21 22:19:31,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:31,731 INFO L225 Difference]: With dead ends: 33 [2023-11-21 22:19:31,731 INFO L226 Difference]: Without dead ends: 16 [2023-11-21 22:19:31,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:19:31,738 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:31,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:19:31,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-21 22:19:31,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-21 22:19:31,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:19:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-21 22:19:31,779 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2023-11-21 22:19:31,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:31,780 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-21 22:19:31,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 22:19:31,780 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-21 22:19:31,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 22:19:31,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:31,782 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:31,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 22:19:32,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 22:19:32,001 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:32,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:32,002 INFO L85 PathProgramCache]: Analyzing trace with hash -139672761, now seen corresponding path program 1 times [2023-11-21 22:19:32,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:32,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586129006] [2023-11-21 22:19:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:32,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:32,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:32,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:19:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:32,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:19:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:19:32,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:32,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586129006] [2023-11-21 22:19:32,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586129006] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:32,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041795617] [2023-11-21 22:19:32,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:32,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:32,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:32,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:32,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:19:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:32,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:19:32,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:19:32,274 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:19:32,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041795617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:32,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:19:32,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-21 22:19:32,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057579543] [2023-11-21 22:19:32,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:32,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:19:32,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:32,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:19:32,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:19:32,278 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 22:19:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:32,304 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2023-11-21 22:19:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:19:32,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-21 22:19:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:32,306 INFO L225 Difference]: With dead ends: 29 [2023-11-21 22:19:32,306 INFO L226 Difference]: Without dead ends: 17 [2023-11-21 22:19:32,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:19:32,309 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:32,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:19:32,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-21 22:19:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-21 22:19:32,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:19:32,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-21 22:19:32,316 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2023-11-21 22:19:32,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:32,317 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-21 22:19:32,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 22:19:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-21 22:19:32,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 22:19:32,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:32,319 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:32,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:32,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:32,533 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:32,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:32,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1528172865, now seen corresponding path program 1 times [2023-11-21 22:19:32,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:32,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713619062] [2023-11-21 22:19:32,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:32,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:32,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:32,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:19:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:32,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:19:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 22:19:32,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:32,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713619062] [2023-11-21 22:19:32,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713619062] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:32,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140408902] [2023-11-21 22:19:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:32,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:32,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:32,831 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:32,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:19:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:32,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:19:32,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 22:19:32,937 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:19:32,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140408902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:32,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:19:32,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-21 22:19:32,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970519045] [2023-11-21 22:19:32,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:32,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:19:32,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:32,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:19:32,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:19:32,940 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 22:19:32,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:32,964 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-11-21 22:19:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:19:32,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-11-21 22:19:32,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:32,966 INFO L225 Difference]: With dead ends: 27 [2023-11-21 22:19:32,966 INFO L226 Difference]: Without dead ends: 18 [2023-11-21 22:19:32,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:19:32,968 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:32,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:19:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-21 22:19:32,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-21 22:19:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:19:32,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-21 22:19:32,974 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2023-11-21 22:19:32,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:32,976 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-21 22:19:32,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 22:19:32,976 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-21 22:19:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 22:19:32,978 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:32,978 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:33,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:33,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:33,200 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:33,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:33,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2034364435, now seen corresponding path program 1 times [2023-11-21 22:19:33,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:33,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796908847] [2023-11-21 22:19:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:33,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:33,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-21 22:19:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:33,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:19:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:33,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-21 22:19:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:19:33,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:33,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796908847] [2023-11-21 22:19:33,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796908847] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:33,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19253039] [2023-11-21 22:19:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:33,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:33,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:33,376 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:33,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:19:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:33,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:19:33,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-21 22:19:33,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-21 22:19:33,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19253039] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:33,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:33,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-11-21 22:19:33,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018686049] [2023-11-21 22:19:33,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:33,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:19:33,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:33,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:19:33,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:19:33,592 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 22:19:33,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:33,653 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2023-11-21 22:19:33,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:19:33,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2023-11-21 22:19:33,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:33,655 INFO L225 Difference]: With dead ends: 37 [2023-11-21 22:19:33,655 INFO L226 Difference]: Without dead ends: 22 [2023-11-21 22:19:33,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:19:33,664 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:33,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:19:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-21 22:19:33,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-21 22:19:33,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:19:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-21 22:19:33,675 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 25 [2023-11-21 22:19:33,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:33,675 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-21 22:19:33,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 22:19:33,676 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-21 22:19:33,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-21 22:19:33,677 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:33,677 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:33,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:33,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:33,892 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:33,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:33,893 INFO L85 PathProgramCache]: Analyzing trace with hash 410389393, now seen corresponding path program 2 times [2023-11-21 22:19:33,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:33,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467014812] [2023-11-21 22:19:33,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:33,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:34,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:19:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:34,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:19:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:34,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-21 22:19:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-21 22:19:34,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:34,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467014812] [2023-11-21 22:19:34,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467014812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:34,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558267309] [2023-11-21 22:19:34,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:19:34,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:34,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:34,094 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:34,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:19:34,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:19:34,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:19:34,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:19:34,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-21 22:19:34,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-21 22:19:34,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558267309] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:34,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:34,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-11-21 22:19:34,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283686157] [2023-11-21 22:19:34,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:34,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 22:19:34,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:34,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 22:19:34,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:19:34,362 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-21 22:19:34,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:34,426 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2023-11-21 22:19:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 22:19:34,427 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 31 [2023-11-21 22:19:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:34,429 INFO L225 Difference]: With dead ends: 45 [2023-11-21 22:19:34,429 INFO L226 Difference]: Without dead ends: 29 [2023-11-21 22:19:34,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:19:34,431 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:34,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 94 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:19:34,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-21 22:19:34,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-21 22:19:34,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:19:34,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-21 22:19:34,447 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 31 [2023-11-21 22:19:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:34,447 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-21 22:19:34,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-21 22:19:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-21 22:19:34,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-21 22:19:34,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:34,448 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:34,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:34,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:34,668 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:34,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:34,668 INFO L85 PathProgramCache]: Analyzing trace with hash 695802077, now seen corresponding path program 3 times [2023-11-21 22:19:34,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:34,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595841425] [2023-11-21 22:19:34,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:34,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:35,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-21 22:19:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:35,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 22:19:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:35,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-21 22:19:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-21 22:19:35,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:35,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595841425] [2023-11-21 22:19:35,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595841425] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:35,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643995292] [2023-11-21 22:19:35,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:19:35,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:35,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:35,034 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:35,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:19:35,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-21 22:19:35,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:19:35,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:19:35,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-21 22:19:35,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-21 22:19:35,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643995292] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:35,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:35,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-11-21 22:19:35,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602126735] [2023-11-21 22:19:35,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:35,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 22:19:35,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:35,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 22:19:35,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:19:35,278 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 22:19:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:35,348 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2023-11-21 22:19:35,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-21 22:19:35,348 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2023-11-21 22:19:35,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:35,350 INFO L225 Difference]: With dead ends: 51 [2023-11-21 22:19:35,351 INFO L226 Difference]: Without dead ends: 34 [2023-11-21 22:19:35,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:19:35,355 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:35,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:19:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-21 22:19:35,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-21 22:19:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:19:35,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-11-21 22:19:35,372 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 38 [2023-11-21 22:19:35,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:35,374 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-11-21 22:19:35,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 22:19:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-11-21 22:19:35,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-21 22:19:35,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:35,379 INFO L195 NwaCegarLoop]: trace histogram [18, 11, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:35,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:35,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-21 22:19:35,592 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:35,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:35,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1973111431, now seen corresponding path program 4 times [2023-11-21 22:19:35,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:35,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475995770] [2023-11-21 22:19:35,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:35,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:36,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:19:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:36,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-21 22:19:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:36,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-21 22:19:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2023-11-21 22:19:36,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:36,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475995770] [2023-11-21 22:19:36,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475995770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:36,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406183124] [2023-11-21 22:19:36,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:19:36,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:36,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:36,181 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:36,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:19:36,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:19:36,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:19:36,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 22:19:36,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2023-11-21 22:19:36,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2023-11-21 22:19:36,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406183124] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:36,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:36,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 27 [2023-11-21 22:19:36,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656531183] [2023-11-21 22:19:36,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:36,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-21 22:19:36,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:36,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-21 22:19:36,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-21 22:19:36,737 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 22:19:36,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:36,811 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2023-11-21 22:19:36,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-21 22:19:36,812 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 51 [2023-11-21 22:19:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:36,814 INFO L225 Difference]: With dead ends: 68 [2023-11-21 22:19:36,814 INFO L226 Difference]: Without dead ends: 47 [2023-11-21 22:19:36,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-21 22:19:36,817 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:36,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:19:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-21 22:19:36,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-21 22:19:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:19:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-11-21 22:19:36,831 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 51 [2023-11-21 22:19:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:36,833 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-11-21 22:19:36,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 22:19:36,834 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-11-21 22:19:36,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-21 22:19:36,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:36,841 INFO L195 NwaCegarLoop]: trace histogram [24, 18, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:36,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:37,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:37,058 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:37,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:37,059 INFO L85 PathProgramCache]: Analyzing trace with hash 529749405, now seen corresponding path program 5 times [2023-11-21 22:19:37,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:37,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372061049] [2023-11-21 22:19:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:37,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:38,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:19:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:38,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-21 22:19:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:38,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-21 22:19:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2023-11-21 22:19:38,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:38,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372061049] [2023-11-21 22:19:38,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372061049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:38,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824631276] [2023-11-21 22:19:38,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 22:19:38,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:38,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:38,219 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:38,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:19:39,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-21 22:19:39,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:19:39,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:19:39,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 102 proven. 3 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2023-11-21 22:19:39,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2023-11-21 22:19:39,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824631276] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:39,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:39,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 5, 5] total 33 [2023-11-21 22:19:39,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621556548] [2023-11-21 22:19:39,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:39,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-21 22:19:39,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:39,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-21 22:19:39,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=678, Unknown=0, NotChecked=0, Total=1056 [2023-11-21 22:19:39,664 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 22:19:39,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:39,737 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-11-21 22:19:39,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-21 22:19:39,738 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2023-11-21 22:19:39,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:39,739 INFO L225 Difference]: With dead ends: 73 [2023-11-21 22:19:39,739 INFO L226 Difference]: Without dead ends: 52 [2023-11-21 22:19:39,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=678, Unknown=0, NotChecked=0, Total=1056 [2023-11-21 22:19:39,741 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:39,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:19:39,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-21 22:19:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-21 22:19:39,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:19:39,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2023-11-21 22:19:39,750 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 64 [2023-11-21 22:19:39,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:39,751 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2023-11-21 22:19:39,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 22:19:39,751 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2023-11-21 22:19:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-21 22:19:39,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:39,752 INFO L195 NwaCegarLoop]: trace histogram [25, 18, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:39,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:39,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:39,975 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:39,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1919994425, now seen corresponding path program 6 times [2023-11-21 22:19:39,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:39,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205673877] [2023-11-21 22:19:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:39,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:41,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-21 22:19:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:41,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-21 22:19:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:41,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:19:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2023-11-21 22:19:41,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:41,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205673877] [2023-11-21 22:19:41,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205673877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:41,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617188848] [2023-11-21 22:19:41,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-21 22:19:41,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:41,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:41,182 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:41,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 22:19:41,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-21 22:19:41,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:19:41,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 22:19:41,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2023-11-21 22:19:41,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2023-11-21 22:19:41,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617188848] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:41,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:41,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9, 9] total 42 [2023-11-21 22:19:41,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873503827] [2023-11-21 22:19:41,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:41,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-21 22:19:41,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:41,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-21 22:19:41,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=497, Invalid=1225, Unknown=0, NotChecked=0, Total=1722 [2023-11-21 22:19:41,826 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 42 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 22:19:41,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:41,930 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2023-11-21 22:19:41,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-21 22:19:41,931 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 69 [2023-11-21 22:19:41,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:41,932 INFO L225 Difference]: With dead ends: 86 [2023-11-21 22:19:41,932 INFO L226 Difference]: Without dead ends: 61 [2023-11-21 22:19:41,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1225, Unknown=0, NotChecked=0, Total=1722 [2023-11-21 22:19:41,935 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:41,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:19:41,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-21 22:19:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-21 22:19:41,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:19:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2023-11-21 22:19:41,944 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 69 [2023-11-21 22:19:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:41,944 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2023-11-21 22:19:41,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 22:19:41,944 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2023-11-21 22:19:41,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-21 22:19:41,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:41,946 INFO L195 NwaCegarLoop]: trace histogram [42, 26, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:41,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-21 22:19:42,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:42,167 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:42,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:42,168 INFO L85 PathProgramCache]: Analyzing trace with hash -815609891, now seen corresponding path program 7 times [2023-11-21 22:19:42,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:42,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424193970] [2023-11-21 22:19:42,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:42,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:43,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-21 22:19:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:43,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 22:19:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:43,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-21 22:19:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2023-11-21 22:19:43,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:43,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424193970] [2023-11-21 22:19:43,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424193970] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:43,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369438226] [2023-11-21 22:19:43,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 22:19:43,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:43,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:43,665 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:43,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 22:19:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:43,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-21 22:19:43,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2023-11-21 22:19:43,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2023-11-21 22:19:44,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369438226] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:44,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:44,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 43 [2023-11-21 22:19:44,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523675100] [2023-11-21 22:19:44,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:44,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-21 22:19:44,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:44,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-21 22:19:44,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2023-11-21 22:19:44,852 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 43 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 22:19:44,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:44,927 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2023-11-21 22:19:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-21 22:19:44,928 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 94 [2023-11-21 22:19:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:44,931 INFO L225 Difference]: With dead ends: 108 [2023-11-21 22:19:44,931 INFO L226 Difference]: Without dead ends: 75 [2023-11-21 22:19:44,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 14 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2023-11-21 22:19:44,933 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:44,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:19:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-21 22:19:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-21 22:19:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:19:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2023-11-21 22:19:44,948 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 94 [2023-11-21 22:19:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:44,948 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2023-11-21 22:19:44,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 22:19:44,949 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2023-11-21 22:19:44,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-21 22:19:44,954 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:44,954 INFO L195 NwaCegarLoop]: trace histogram [42, 40, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:44,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:45,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:45,168 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:45,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:45,169 INFO L85 PathProgramCache]: Analyzing trace with hash 883592349, now seen corresponding path program 8 times [2023-11-21 22:19:45,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:45,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605753489] [2023-11-21 22:19:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:45,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:45,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:19:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:46,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-21 22:19:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:46,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-21 22:19:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1837 backedges. 0 proven. 557 refuted. 0 times theorem prover too weak. 1280 trivial. 0 not checked. [2023-11-21 22:19:46,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:46,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605753489] [2023-11-21 22:19:46,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605753489] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:46,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180346494] [2023-11-21 22:19:46,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:19:46,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:46,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:46,124 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:46,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 22:19:46,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:19:46,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:19:46,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-21 22:19:46,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1837 backedges. 452 proven. 105 refuted. 0 times theorem prover too weak. 1280 trivial. 0 not checked. [2023-11-21 22:19:46,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1837 backedges. 0 proven. 557 refuted. 0 times theorem prover too weak. 1280 trivial. 0 not checked. [2023-11-21 22:19:46,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180346494] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:46,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:46,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2023-11-21 22:19:46,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964511121] [2023-11-21 22:19:46,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:46,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-21 22:19:46,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:46,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-21 22:19:46,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-11-21 22:19:46,891 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:19:46,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:46,948 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2023-11-21 22:19:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-21 22:19:46,949 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 108 [2023-11-21 22:19:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:46,950 INFO L225 Difference]: With dead ends: 123 [2023-11-21 22:19:46,950 INFO L226 Difference]: Without dead ends: 91 [2023-11-21 22:19:46,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-11-21 22:19:46,952 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:46,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:19:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-21 22:19:46,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-11-21 22:19:46,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:19:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2023-11-21 22:19:46,964 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 108 [2023-11-21 22:19:46,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:46,964 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2023-11-21 22:19:46,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:19:46,965 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2023-11-21 22:19:46,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-21 22:19:46,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:46,967 INFO L195 NwaCegarLoop]: trace histogram [90, 40, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:46,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:47,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:47,180 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:47,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:47,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1352176483, now seen corresponding path program 9 times [2023-11-21 22:19:47,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:47,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501449589] [2023-11-21 22:19:47,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:47,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:49,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:19:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:50,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-21 22:19:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:50,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-21 22:19:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5125 backedges. 0 proven. 2389 refuted. 0 times theorem prover too weak. 2736 trivial. 0 not checked. [2023-11-21 22:19:50,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:50,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501449589] [2023-11-21 22:19:50,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501449589] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:50,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773853374] [2023-11-21 22:19:50,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:19:50,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:50,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:50,200 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:50,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-21 22:19:50,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-21 22:19:50,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:19:50,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 22:19:50,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5125 backedges. 1926 proven. 21 refuted. 0 times theorem prover too weak. 3178 trivial. 0 not checked. [2023-11-21 22:19:50,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5125 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 5104 trivial. 0 not checked. [2023-11-21 22:19:51,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773853374] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:51,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:51,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 9, 9] total 47 [2023-11-21 22:19:51,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005115701] [2023-11-21 22:19:51,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:51,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-21 22:19:51,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:51,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-21 22:19:51,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=1515, Unknown=0, NotChecked=0, Total=2162 [2023-11-21 22:19:51,009 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 47 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 47 states have internal predecessors, (65), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 22:19:51,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:51,101 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2023-11-21 22:19:51,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-21 22:19:51,102 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 47 states have internal predecessors, (65), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 156 [2023-11-21 22:19:51,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:51,103 INFO L225 Difference]: With dead ends: 148 [2023-11-21 22:19:51,104 INFO L226 Difference]: Without dead ends: 100 [2023-11-21 22:19:51,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=647, Invalid=1515, Unknown=0, NotChecked=0, Total=2162 [2023-11-21 22:19:51,107 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:51,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:19:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-21 22:19:51,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-21 22:19:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:19:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2023-11-21 22:19:51,118 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 156 [2023-11-21 22:19:51,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:51,118 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2023-11-21 22:19:51,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 47 states have internal predecessors, (65), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 22:19:51,119 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2023-11-21 22:19:51,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-21 22:19:51,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:51,121 INFO L195 NwaCegarLoop]: trace histogram [93, 40, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:51,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:51,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 22:19:51,336 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:51,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:51,337 INFO L85 PathProgramCache]: Analyzing trace with hash 2031920169, now seen corresponding path program 10 times [2023-11-21 22:19:51,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:51,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780050783] [2023-11-21 22:19:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:51,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:53,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:19:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:54,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-11-21 22:19:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:54,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2023-11-21 22:19:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5491 backedges. 0 proven. 2546 refuted. 0 times theorem prover too weak. 2945 trivial. 0 not checked. [2023-11-21 22:19:54,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:54,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780050783] [2023-11-21 22:19:54,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780050783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:54,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528001115] [2023-11-21 22:19:54,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:19:54,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:54,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:54,373 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:54,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-21 22:19:54,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:19:54,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:19:54,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-21 22:19:54,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5491 backedges. 2050 proven. 496 refuted. 0 times theorem prover too weak. 2945 trivial. 0 not checked. [2023-11-21 22:19:54,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5491 backedges. 0 proven. 2546 refuted. 0 times theorem prover too weak. 2945 trivial. 0 not checked. [2023-11-21 22:19:55,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528001115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:55,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:55,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 42 [2023-11-21 22:19:55,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506504118] [2023-11-21 22:19:55,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:55,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-21 22:19:55,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:55,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-21 22:19:55,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2023-11-21 22:19:55,745 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 42 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 42 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:19:55,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:19:55,826 INFO L93 Difference]: Finished difference Result 166 states and 184 transitions. [2023-11-21 22:19:55,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-21 22:19:55,827 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 42 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2023-11-21 22:19:55,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:19:55,828 INFO L225 Difference]: With dead ends: 166 [2023-11-21 22:19:55,828 INFO L226 Difference]: Without dead ends: 109 [2023-11-21 22:19:55,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 308 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2023-11-21 22:19:55,831 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:19:55,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:19:55,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-21 22:19:55,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-11-21 22:19:55,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:19:55,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2023-11-21 22:19:55,848 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 167 [2023-11-21 22:19:55,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:19:55,849 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2023-11-21 22:19:55,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 42 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:19:55,849 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2023-11-21 22:19:55,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-21 22:19:55,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:19:55,852 INFO L195 NwaCegarLoop]: trace histogram [120, 40, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:55,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:56,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 22:19:56,068 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:19:56,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:56,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1116676765, now seen corresponding path program 11 times [2023-11-21 22:19:56,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:56,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857794942] [2023-11-21 22:19:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:56,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:57,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:19:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:57,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-21 22:19:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:57,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-21 22:19:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8434 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 8329 trivial. 0 not checked. [2023-11-21 22:19:57,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:57,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857794942] [2023-11-21 22:19:57,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857794942] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:57,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571466709] [2023-11-21 22:19:57,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 22:19:57,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:57,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:57,599 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:57,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabbcbbd-40a5-427c-9fd5-888672dbf5a4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process