./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-75.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-75.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme --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 5f27064a0b5796ba4fcefa469388f6a0b44b51572a6c95971fa540335b609a62 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:52:47,112 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:52:47,186 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:52:47,192 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:52:47,192 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:52:47,221 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:52:47,222 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:52:47,223 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:52:47,224 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:52:47,224 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:52:47,225 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:52:47,226 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:52:47,226 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:52:47,227 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:52:47,228 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:52:47,228 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:52:47,229 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:52:47,230 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:52:47,230 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:52:47,231 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:52:47,231 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:52:47,232 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:52:47,233 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:52:47,234 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:52:47,234 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:52:47,235 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:52:47,235 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:52:47,236 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:52:47,237 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:52:47,237 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:52:47,238 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:52:47,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:52:47,239 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:52:47,239 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:52:47,240 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:52:47,240 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:52:47,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:52:47,241 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:52:47,242 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:52:47,242 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:52:47,242 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:52:47,243 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:52:47,243 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_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f27064a0b5796ba4fcefa469388f6a0b44b51572a6c95971fa540335b609a62 [2023-11-26 11:52:47,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:52:47,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:52:47,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:52:47,631 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:52:47,631 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:52:47,633 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-75.i [2023-11-26 11:52:50,779 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:52:51,086 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:52:51,087 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-75.i [2023-11-26 11:52:51,110 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/data/4d89456fd/8730b91a735e4a3cba94a4581e4db159/FLAG002fcda22 [2023-11-26 11:52:51,130 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/data/4d89456fd/8730b91a735e4a3cba94a4581e4db159 [2023-11-26 11:52:51,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:52:51,135 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:52:51,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:51,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:52:51,143 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:52:51,144 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:51" (1/1) ... [2023-11-26 11:52:51,145 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e553c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:51, skipping insertion in model container [2023-11-26 11:52:51,146 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:51" (1/1) ... [2023-11-26 11:52:51,231 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:52:51,410 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_2b2827e8-6c76-48bf-9f76-031d41b76602/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-75.i[916,929] [2023-11-26 11:52:51,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:51,757 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:52:51,769 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_2b2827e8-6c76-48bf-9f76-031d41b76602/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-75.i[916,929] [2023-11-26 11:52:51,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:51,944 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:52:51,945 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:51 WrapperNode [2023-11-26 11:52:51,945 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:51,947 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:52:51,947 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:52:51,947 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:52:51,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:51" (1/1) ... [2023-11-26 11:52:51,998 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:51" (1/1) ... [2023-11-26 11:52:52,134 INFO L138 Inliner]: procedures = 26, calls = 136, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 1143 [2023-11-26 11:52:52,134 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:52:52,136 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:52:52,137 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:52:52,137 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:52:52,150 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:51" (1/1) ... [2023-11-26 11:52:52,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:51" (1/1) ... [2023-11-26 11:52:52,169 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:51" (1/1) ... [2023-11-26 11:52:52,268 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:52:52,284 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:51" (1/1) ... [2023-11-26 11:52:52,284 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:51" (1/1) ... [2023-11-26 11:52:52,339 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:51" (1/1) ... [2023-11-26 11:52:52,352 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:51" (1/1) ... [2023-11-26 11:52:52,359 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:51" (1/1) ... [2023-11-26 11:52:52,370 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:51" (1/1) ... [2023-11-26 11:52:52,400 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:52:52,401 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:52:52,401 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:52:52,401 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:52:52,402 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:51" (1/1) ... [2023-11-26 11:52:52,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:52:52,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:52,441 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:52:52,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:52:52,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:52:52,491 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:52:52,492 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:52:52,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:52:52,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:52:52,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:52:52,712 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:52:52,715 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:52:54,125 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:52:54,179 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:52:54,180 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:52:54,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:52:54 BoogieIcfgContainer [2023-11-26 11:52:54,181 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:52:54,186 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:52:54,186 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:52:54,189 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:52:54,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:52:51" (1/3) ... [2023-11-26 11:52:54,191 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3735d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:52:54, skipping insertion in model container [2023-11-26 11:52:54,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:51" (2/3) ... [2023-11-26 11:52:54,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3735d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:52:54, skipping insertion in model container [2023-11-26 11:52:54,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:52:54" (3/3) ... [2023-11-26 11:52:54,196 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-75.i [2023-11-26 11:52:54,220 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:52:54,220 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:52:54,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:52:54,294 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;@278538bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:52:54,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:52:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand has 405 states, 279 states have (on average 1.6451612903225807) internal successors, (459), 280 states have internal predecessors, (459), 123 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2023-11-26 11:52:54,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2023-11-26 11:52:54,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:54,358 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:54,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:54,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:54,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1804171644, now seen corresponding path program 1 times [2023-11-26 11:52:54,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:54,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96520115] [2023-11-26 11:52:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:54,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:54,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:54,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96520115] [2023-11-26 11:52:54,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:52:54,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308438167] [2023-11-26 11:52:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:54,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:54,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:54,978 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:54,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:52:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:55,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 1771 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:52:55,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 29768 trivial. 0 not checked. [2023-11-26 11:52:55,725 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:55,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308438167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:55,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:55,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:52:55,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078698727] [2023-11-26 11:52:55,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:55,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:52:55,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:55,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:52:55,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:52:55,784 INFO L87 Difference]: Start difference. First operand has 405 states, 279 states have (on average 1.6451612903225807) internal successors, (459), 280 states have internal predecessors, (459), 123 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) Second operand has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 2 states have call successors, (123), 2 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 2 states have call successors, (123) [2023-11-26 11:52:55,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:55,913 INFO L93 Difference]: Finished difference Result 807 states and 1531 transitions. [2023-11-26 11:52:55,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:52:55,916 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 2 states have call successors, (123), 2 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 2 states have call successors, (123) Word has length 783 [2023-11-26 11:52:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:55,930 INFO L225 Difference]: With dead ends: 807 [2023-11-26 11:52:55,931 INFO L226 Difference]: Without dead ends: 403 [2023-11-26 11:52:55,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 782 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:52:55,988 INFO L413 NwaCegarLoop]: 696 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:55,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 696 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:52:56,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2023-11-26 11:52:56,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2023-11-26 11:52:56,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 278 states have (on average 1.629496402877698) internal successors, (453), 278 states have internal predecessors, (453), 123 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2023-11-26 11:52:56,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 699 transitions. [2023-11-26 11:52:56,139 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 699 transitions. Word has length 783 [2023-11-26 11:52:56,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:56,140 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 699 transitions. [2023-11-26 11:52:56,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 2 states have call successors, (123), 2 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 2 states have call successors, (123) [2023-11-26 11:52:56,141 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 699 transitions. [2023-11-26 11:52:56,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2023-11-26 11:52:56,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:56,169 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:56,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:56,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:52:56,379 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:56,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:56,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1127187919, now seen corresponding path program 1 times [2023-11-26 11:52:56,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:56,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861942550] [2023-11-26 11:52:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:56,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:56,593 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:56,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205611651] [2023-11-26 11:52:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:56,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:56,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:56,596 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:56,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:52:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:57,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 1774 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:52:57,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30012 trivial. 0 not checked. [2023-11-26 11:52:57,296 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:57,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:57,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861942550] [2023-11-26 11:52:57,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:57,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205611651] [2023-11-26 11:52:57,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205611651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:57,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:57,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:52:57,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022412712] [2023-11-26 11:52:57,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:57,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:57,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:57,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:57,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:57,306 INFO L87 Difference]: Start difference. First operand 403 states and 699 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-26 11:52:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:57,375 INFO L93 Difference]: Finished difference Result 810 states and 1406 transitions. [2023-11-26 11:52:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:57,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) Word has length 784 [2023-11-26 11:52:57,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:57,385 INFO L225 Difference]: With dead ends: 810 [2023-11-26 11:52:57,385 INFO L226 Difference]: Without dead ends: 408 [2023-11-26 11:52:57,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 782 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:57,389 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 6 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:57,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1384 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:52:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-11-26 11:52:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 404. [2023-11-26 11:52:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 279 states have (on average 1.6272401433691757) internal successors, (454), 279 states have internal predecessors, (454), 123 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2023-11-26 11:52:57,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 700 transitions. [2023-11-26 11:52:57,437 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 700 transitions. Word has length 784 [2023-11-26 11:52:57,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:57,442 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 700 transitions. [2023-11-26 11:52:57,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-26 11:52:57,442 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 700 transitions. [2023-11-26 11:52:57,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2023-11-26 11:52:57,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:57,453 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:57,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:57,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:57,663 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:57,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:57,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1918493962, now seen corresponding path program 1 times [2023-11-26 11:52:57,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:57,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616048801] [2023-11-26 11:52:57,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:57,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:57,829 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:57,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153793108] [2023-11-26 11:52:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:57,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:57,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:57,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:57,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:52:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:58,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:52:58,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30012 trivial. 0 not checked. [2023-11-26 11:52:59,710 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:59,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:59,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616048801] [2023-11-26 11:52:59,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:59,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153793108] [2023-11-26 11:52:59,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153793108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:59,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:59,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:52:59,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577119379] [2023-11-26 11:52:59,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:59,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:52:59,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:59,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:52:59,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:52:59,716 INFO L87 Difference]: Start difference. First operand 404 states and 700 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-26 11:52:59,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:59,827 INFO L93 Difference]: Finished difference Result 1210 states and 2098 transitions. [2023-11-26 11:52:59,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:52:59,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) Word has length 785 [2023-11-26 11:52:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:59,848 INFO L225 Difference]: With dead ends: 1210 [2023-11-26 11:52:59,849 INFO L226 Difference]: Without dead ends: 807 [2023-11-26 11:52:59,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 782 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:52:59,854 INFO L413 NwaCegarLoop]: 692 mSDtfsCounter, 351 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 2071 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:59,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 2071 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:52:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2023-11-26 11:53:00,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 799. [2023-11-26 11:53:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 550 states have (on average 1.6236363636363635) internal successors, (893), 550 states have internal predecessors, (893), 246 states have call successors, (246), 2 states have call predecessors, (246), 2 states have return successors, (246), 246 states have call predecessors, (246), 246 states have call successors, (246) [2023-11-26 11:53:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1385 transitions. [2023-11-26 11:53:00,017 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1385 transitions. Word has length 785 [2023-11-26 11:53:00,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:00,019 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1385 transitions. [2023-11-26 11:53:00,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-26 11:53:00,020 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1385 transitions. [2023-11-26 11:53:00,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2023-11-26 11:53:00,030 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:00,030 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:00,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:00,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:00,241 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:00,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:00,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1031271116, now seen corresponding path program 1 times [2023-11-26 11:53:00,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:00,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557893501] [2023-11-26 11:53:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:00,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:00,370 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:00,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718053942] [2023-11-26 11:53:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:00,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:00,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:00,373 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:00,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:53:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:00,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:53:00,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30012 trivial. 0 not checked. [2023-11-26 11:53:01,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:01,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:01,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557893501] [2023-11-26 11:53:01,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:01,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718053942] [2023-11-26 11:53:01,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718053942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:01,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:01,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:01,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556925661] [2023-11-26 11:53:01,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:01,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:01,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:01,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:01,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:01,030 INFO L87 Difference]: Start difference. First operand 799 states and 1385 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-26 11:53:01,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:01,175 INFO L93 Difference]: Finished difference Result 2391 states and 4145 transitions. [2023-11-26 11:53:01,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:01,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) Word has length 785 [2023-11-26 11:53:01,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:01,196 INFO L225 Difference]: With dead ends: 2391 [2023-11-26 11:53:01,196 INFO L226 Difference]: Without dead ends: 1593 [2023-11-26 11:53:01,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:01,204 INFO L413 NwaCegarLoop]: 1138 mSDtfsCounter, 679 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:01,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 1826 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:53:01,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2023-11-26 11:53:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1587. [2023-11-26 11:53:01,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1090 states have (on average 1.61651376146789) internal successors, (1762), 1090 states have internal predecessors, (1762), 492 states have call successors, (492), 4 states have call predecessors, (492), 4 states have return successors, (492), 492 states have call predecessors, (492), 492 states have call successors, (492) [2023-11-26 11:53:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2746 transitions. [2023-11-26 11:53:01,577 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2746 transitions. Word has length 785 [2023-11-26 11:53:01,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:01,579 INFO L495 AbstractCegarLoop]: Abstraction has 1587 states and 2746 transitions. [2023-11-26 11:53:01,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-26 11:53:01,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2746 transitions. [2023-11-26 11:53:01,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2023-11-26 11:53:01,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:01,590 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:01,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:01,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:01,801 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:01,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:01,801 INFO L85 PathProgramCache]: Analyzing trace with hash 202175288, now seen corresponding path program 1 times [2023-11-26 11:53:01,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:01,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900866117] [2023-11-26 11:53:01,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:01,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:01,912 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:01,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124969124] [2023-11-26 11:53:01,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:01,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:01,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:01,914 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:01,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:53:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:02,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:53:02,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30012 trivial. 0 not checked. [2023-11-26 11:53:02,598 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:02,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:02,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900866117] [2023-11-26 11:53:02,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:02,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124969124] [2023-11-26 11:53:02,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124969124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:02,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:02,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:02,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39060630] [2023-11-26 11:53:02,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:02,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:02,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:02,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:02,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:02,610 INFO L87 Difference]: Start difference. First operand 1587 states and 2746 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-26 11:53:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:02,787 INFO L93 Difference]: Finished difference Result 3891 states and 6744 transitions. [2023-11-26 11:53:02,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:02,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) Word has length 785 [2023-11-26 11:53:02,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:02,807 INFO L225 Difference]: With dead ends: 3891 [2023-11-26 11:53:02,808 INFO L226 Difference]: Without dead ends: 2305 [2023-11-26 11:53:02,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:02,817 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 308 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:02,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 1405 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:53:02,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2023-11-26 11:53:03,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 2299. [2023-11-26 11:53:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 1686 states have (on average 1.6429418742586002) internal successors, (2770), 1690 states have internal predecessors, (2770), 604 states have call successors, (604), 8 states have call predecessors, (604), 8 states have return successors, (604), 600 states have call predecessors, (604), 604 states have call successors, (604) [2023-11-26 11:53:03,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3978 transitions. [2023-11-26 11:53:03,288 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3978 transitions. Word has length 785 [2023-11-26 11:53:03,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:03,289 INFO L495 AbstractCegarLoop]: Abstraction has 2299 states and 3978 transitions. [2023-11-26 11:53:03,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-26 11:53:03,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3978 transitions. [2023-11-26 11:53:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2023-11-26 11:53:03,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:03,302 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:03,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:03,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:03,512 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:03,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:03,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1172043770, now seen corresponding path program 1 times [2023-11-26 11:53:03,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:03,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581765924] [2023-11-26 11:53:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:03,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:03,617 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:03,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409642234] [2023-11-26 11:53:03,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:03,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:03,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:03,619 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:03,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:53:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:04,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 1768 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:53:04,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30012 trivial. 0 not checked. [2023-11-26 11:53:06,932 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:06,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:06,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581765924] [2023-11-26 11:53:06,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:06,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409642234] [2023-11-26 11:53:06,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409642234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:06,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:06,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:53:06,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927702944] [2023-11-26 11:53:06,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:06,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:06,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:06,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:06,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:06,938 INFO L87 Difference]: Start difference. First operand 2299 states and 3978 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-26 11:53:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:07,147 INFO L93 Difference]: Finished difference Result 5755 states and 9966 transitions. [2023-11-26 11:53:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:07,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) Word has length 785 [2023-11-26 11:53:07,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:07,177 INFO L225 Difference]: With dead ends: 5755 [2023-11-26 11:53:07,177 INFO L226 Difference]: Without dead ends: 3457 [2023-11-26 11:53:07,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:07,187 INFO L413 NwaCegarLoop]: 692 mSDtfsCounter, 350 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:07,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 1377 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:53:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2023-11-26 11:53:07,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 3455. [2023-11-26 11:53:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 2536 states have (on average 1.640378548895899) internal successors, (4160), 2542 states have internal predecessors, (4160), 906 states have call successors, (906), 12 states have call predecessors, (906), 12 states have return successors, (906), 900 states have call predecessors, (906), 906 states have call successors, (906) [2023-11-26 11:53:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 5972 transitions. [2023-11-26 11:53:07,719 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 5972 transitions. Word has length 785 [2023-11-26 11:53:07,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:07,720 INFO L495 AbstractCegarLoop]: Abstraction has 3455 states and 5972 transitions. [2023-11-26 11:53:07,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-26 11:53:07,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 5972 transitions. [2023-11-26 11:53:07,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 787 [2023-11-26 11:53:07,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:07,734 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:07,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:07,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:53:07,944 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:07,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:07,945 INFO L85 PathProgramCache]: Analyzing trace with hash -299350233, now seen corresponding path program 1 times [2023-11-26 11:53:07,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:07,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481647170] [2023-11-26 11:53:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:07,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:08,061 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:08,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496529636] [2023-11-26 11:53:08,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:08,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:08,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:08,064 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:08,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:53:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:08,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 1769 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:53:08,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30012 trivial. 0 not checked. [2023-11-26 11:53:08,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:08,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:08,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481647170] [2023-11-26 11:53:08,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:08,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496529636] [2023-11-26 11:53:08,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496529636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:08,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:08,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:08,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715715990] [2023-11-26 11:53:08,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:08,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:08,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:08,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:08,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:08,792 INFO L87 Difference]: Start difference. First operand 3455 states and 5972 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-26 11:53:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:09,080 INFO L93 Difference]: Finished difference Result 8979 states and 15522 transitions. [2023-11-26 11:53:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:09,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) Word has length 786 [2023-11-26 11:53:09,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:09,128 INFO L225 Difference]: With dead ends: 8979 [2023-11-26 11:53:09,128 INFO L226 Difference]: Without dead ends: 5525 [2023-11-26 11:53:09,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 784 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:09,144 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 315 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:09,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 1377 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:53:09,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2023-11-26 11:53:09,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 5517. [2023-11-26 11:53:09,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 4238 states have (on average 1.651722510618216) internal successors, (7000), 4256 states have internal predecessors, (7000), 1254 states have call successors, (1254), 24 states have call predecessors, (1254), 24 states have return successors, (1254), 1236 states have call predecessors, (1254), 1254 states have call successors, (1254) [2023-11-26 11:53:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 9508 transitions. [2023-11-26 11:53:09,924 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 9508 transitions. Word has length 786 [2023-11-26 11:53:09,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:09,926 INFO L495 AbstractCegarLoop]: Abstraction has 5517 states and 9508 transitions. [2023-11-26 11:53:09,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-26 11:53:09,927 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 9508 transitions. [2023-11-26 11:53:09,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 787 [2023-11-26 11:53:09,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:09,945 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:09,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:10,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:53:10,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:10,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:10,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2008434981, now seen corresponding path program 1 times [2023-11-26 11:53:10,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:10,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472434348] [2023-11-26 11:53:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:10,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:10,296 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:10,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91697778] [2023-11-26 11:53:10,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:10,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:10,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:10,298 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:10,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:53:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:10,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 1768 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:53:10,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 10706 proven. 282 refuted. 0 times theorem prover too weak. 19024 trivial. 0 not checked. [2023-11-26 11:53:12,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 84 proven. 282 refuted. 0 times theorem prover too weak. 29646 trivial. 0 not checked. [2023-11-26 11:53:12,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:12,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472434348] [2023-11-26 11:53:12,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:12,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91697778] [2023-11-26 11:53:12,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91697778] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:12,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:53:12,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:53:12,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659228150] [2023-11-26 11:53:12,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:12,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:53:12,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:12,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:53:12,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:53:12,828 INFO L87 Difference]: Start difference. First operand 5517 states and 9508 transitions. Second operand has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (217), 2 states have call predecessors, (217), 4 states have return successors, (218), 2 states have call predecessors, (218), 2 states have call successors, (218) [2023-11-26 11:53:14,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:14,032 INFO L93 Difference]: Finished difference Result 9089 states and 15609 transitions. [2023-11-26 11:53:14,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:53:14,033 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (217), 2 states have call predecessors, (217), 4 states have return successors, (218), 2 states have call predecessors, (218), 2 states have call successors, (218) Word has length 786 [2023-11-26 11:53:14,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:14,066 INFO L225 Difference]: With dead ends: 9089 [2023-11-26 11:53:14,066 INFO L226 Difference]: Without dead ends: 3573 [2023-11-26 11:53:14,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1574 GetRequests, 1564 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:53:14,088 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 394 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1562 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:14,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 1562 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:53:14,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3573 states. [2023-11-26 11:53:14,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3573 to 3546. [2023-11-26 11:53:14,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 2574 states have (on average 1.6095571095571095) internal successors, (4143), 2581 states have internal predecessors, (4143), 946 states have call successors, (946), 25 states have call predecessors, (946), 25 states have return successors, (946), 939 states have call predecessors, (946), 946 states have call successors, (946) [2023-11-26 11:53:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 6035 transitions. [2023-11-26 11:53:14,860 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 6035 transitions. Word has length 786 [2023-11-26 11:53:14,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:14,862 INFO L495 AbstractCegarLoop]: Abstraction has 3546 states and 6035 transitions. [2023-11-26 11:53:14,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (217), 2 states have call predecessors, (217), 4 states have return successors, (218), 2 states have call predecessors, (218), 2 states have call successors, (218) [2023-11-26 11:53:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 6035 transitions. [2023-11-26 11:53:14,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 792 [2023-11-26 11:53:14,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:14,876 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:14,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:15,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:53:15,086 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:15,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:15,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1909791209, now seen corresponding path program 1 times [2023-11-26 11:53:15,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:15,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685316047] [2023-11-26 11:53:15,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:15,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:15,181 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:15,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930941550] [2023-11-26 11:53:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:15,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:15,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:15,184 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:15,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:53:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:15,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:53:15,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 14748 proven. 153 refuted. 0 times theorem prover too weak. 15111 trivial. 0 not checked. [2023-11-26 11:53:16,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 213 proven. 153 refuted. 0 times theorem prover too weak. 29646 trivial. 0 not checked. [2023-11-26 11:53:17,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:17,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685316047] [2023-11-26 11:53:17,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930941550] [2023-11-26 11:53:17,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930941550] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:17,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:53:17,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 11:53:17,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761235733] [2023-11-26 11:53:17,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:17,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:53:17,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:17,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:53:17,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:53:17,174 INFO L87 Difference]: Start difference. First operand 3546 states and 6035 transitions. Second operand has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 3 states have call successors, (174), 2 states have call predecessors, (174), 4 states have return successors, (175), 3 states have call predecessors, (175), 3 states have call successors, (175) [2023-11-26 11:53:18,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:18,512 INFO L93 Difference]: Finished difference Result 7092 states and 12037 transitions. [2023-11-26 11:53:18,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:53:18,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 3 states have call successors, (174), 2 states have call predecessors, (174), 4 states have return successors, (175), 3 states have call predecessors, (175), 3 states have call successors, (175) Word has length 791 [2023-11-26 11:53:18,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:18,556 INFO L225 Difference]: With dead ends: 7092 [2023-11-26 11:53:18,556 INFO L226 Difference]: Without dead ends: 3596 [2023-11-26 11:53:18,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1574 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:53:18,574 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 1576 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:18,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1647 Valid, 1429 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 11:53:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2023-11-26 11:53:19,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 3570. [2023-11-26 11:53:19,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3570 states, 2592 states have (on average 1.5960648148148149) internal successors, (4137), 2599 states have internal predecessors, (4137), 946 states have call successors, (946), 31 states have call predecessors, (946), 31 states have return successors, (946), 939 states have call predecessors, (946), 946 states have call successors, (946) [2023-11-26 11:53:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3570 states to 3570 states and 6029 transitions. [2023-11-26 11:53:19,359 INFO L78 Accepts]: Start accepts. Automaton has 3570 states and 6029 transitions. Word has length 791 [2023-11-26 11:53:19,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:19,361 INFO L495 AbstractCegarLoop]: Abstraction has 3570 states and 6029 transitions. [2023-11-26 11:53:19,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 3 states have call successors, (174), 2 states have call predecessors, (174), 4 states have return successors, (175), 3 states have call predecessors, (175), 3 states have call successors, (175) [2023-11-26 11:53:19,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3570 states and 6029 transitions. [2023-11-26 11:53:19,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2023-11-26 11:53:19,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:19,374 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:19,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:19,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 11:53:19,585 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:19,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:19,586 INFO L85 PathProgramCache]: Analyzing trace with hash -876014161, now seen corresponding path program 1 times [2023-11-26 11:53:19,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:19,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907879646] [2023-11-26 11:53:19,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:19,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:19,689 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:19,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725214797] [2023-11-26 11:53:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:19,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:19,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:19,691 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:19,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:53:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:20,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:53:20,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 12476 proven. 105 refuted. 0 times theorem prover too weak. 17431 trivial. 0 not checked. [2023-11-26 11:53:20,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 261 proven. 105 refuted. 0 times theorem prover too weak. 29646 trivial. 0 not checked. [2023-11-26 11:53:21,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:21,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907879646] [2023-11-26 11:53:21,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:21,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725214797] [2023-11-26 11:53:21,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725214797] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:21,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:53:21,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:53:21,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494444076] [2023-11-26 11:53:21,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:21,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:53:21,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:21,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:53:21,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:53:21,433 INFO L87 Difference]: Start difference. First operand 3570 states and 6029 transitions. Second operand has 7 states, 7 states have (on average 27.142857142857142) internal successors, (190), 7 states have internal predecessors, (190), 2 states have call successors, (158), 2 states have call predecessors, (158), 4 states have return successors, (159), 2 states have call predecessors, (159), 2 states have call successors, (159) [2023-11-26 11:53:22,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:22,468 INFO L93 Difference]: Finished difference Result 7152 states and 12037 transitions. [2023-11-26 11:53:22,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:53:22,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 27.142857142857142) internal successors, (190), 7 states have internal predecessors, (190), 2 states have call successors, (158), 2 states have call predecessors, (158), 4 states have return successors, (159), 2 states have call predecessors, (159), 2 states have call successors, (159) Word has length 793 [2023-11-26 11:53:22,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:22,502 INFO L225 Difference]: With dead ends: 7152 [2023-11-26 11:53:22,503 INFO L226 Difference]: Without dead ends: 3632 [2023-11-26 11:53:22,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1588 GetRequests, 1578 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:53:22,517 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 438 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:22,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 1416 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:53:22,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2023-11-26 11:53:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 3594. [2023-11-26 11:53:23,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3594 states, 2610 states have (on average 1.5735632183908046) internal successors, (4107), 2617 states have internal predecessors, (4107), 946 states have call successors, (946), 37 states have call predecessors, (946), 37 states have return successors, (946), 939 states have call predecessors, (946), 946 states have call successors, (946) [2023-11-26 11:53:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3594 states to 3594 states and 5999 transitions. [2023-11-26 11:53:23,329 INFO L78 Accepts]: Start accepts. Automaton has 3594 states and 5999 transitions. Word has length 793 [2023-11-26 11:53:23,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:23,331 INFO L495 AbstractCegarLoop]: Abstraction has 3594 states and 5999 transitions. [2023-11-26 11:53:23,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.142857142857142) internal successors, (190), 7 states have internal predecessors, (190), 2 states have call successors, (158), 2 states have call predecessors, (158), 4 states have return successors, (159), 2 states have call predecessors, (159), 2 states have call successors, (159) [2023-11-26 11:53:23,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3594 states and 5999 transitions. [2023-11-26 11:53:23,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2023-11-26 11:53:23,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:23,344 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:23,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-26 11:53:23,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:53:23,555 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:23,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:23,555 INFO L85 PathProgramCache]: Analyzing trace with hash 398807981, now seen corresponding path program 1 times [2023-11-26 11:53:23,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:23,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360544296] [2023-11-26 11:53:23,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:23,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:23,666 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:23,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667465127] [2023-11-26 11:53:23,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:23,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:23,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:23,668 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:23,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:53:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:24,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 1789 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:53:24,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 6572 proven. 321 refuted. 0 times theorem prover too weak. 23119 trivial. 0 not checked. [2023-11-26 11:53:25,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 45 proven. 321 refuted. 0 times theorem prover too weak. 29646 trivial. 0 not checked. [2023-11-26 11:53:26,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:26,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360544296] [2023-11-26 11:53:26,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:26,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667465127] [2023-11-26 11:53:26,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667465127] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:26,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:53:26,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-26 11:53:26,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414318414] [2023-11-26 11:53:26,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:26,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:53:26,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:26,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:53:26,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:53:26,501 INFO L87 Difference]: Start difference. First operand 3594 states and 5999 transitions. Second operand has 10 states, 10 states have (on average 34.1) internal successors, (341), 10 states have internal predecessors, (341), 3 states have call successors, (230), 2 states have call predecessors, (230), 4 states have return successors, (231), 3 states have call predecessors, (231), 3 states have call successors, (231) [2023-11-26 11:53:29,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:29,034 INFO L93 Difference]: Finished difference Result 8704 states and 14563 transitions. [2023-11-26 11:53:29,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:53:29,035 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 34.1) internal successors, (341), 10 states have internal predecessors, (341), 3 states have call successors, (230), 2 states have call predecessors, (230), 4 states have return successors, (231), 3 states have call predecessors, (231), 3 states have call successors, (231) Word has length 793 [2023-11-26 11:53:29,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:29,061 INFO L225 Difference]: With dead ends: 8704 [2023-11-26 11:53:29,061 INFO L226 Difference]: Without dead ends: 5160 [2023-11-26 11:53:29,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1598 GetRequests, 1578 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2023-11-26 11:53:29,075 INFO L413 NwaCegarLoop]: 1047 mSDtfsCounter, 1401 mSDsluCounter, 1989 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1403 SdHoareTripleChecker+Valid, 3036 SdHoareTripleChecker+Invalid, 2119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:29,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1403 Valid, 3036 Invalid, 2119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-26 11:53:29,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5160 states. [2023-11-26 11:53:29,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5160 to 3817. [2023-11-26 11:53:30,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3817 states, 2720 states have (on average 1.5150735294117648) internal successors, (4121), 2727 states have internal predecessors, (4121), 1041 states have call successors, (1041), 55 states have call predecessors, (1041), 55 states have return successors, (1041), 1034 states have call predecessors, (1041), 1041 states have call successors, (1041) [2023-11-26 11:53:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3817 states to 3817 states and 6203 transitions. [2023-11-26 11:53:30,017 INFO L78 Accepts]: Start accepts. Automaton has 3817 states and 6203 transitions. Word has length 793 [2023-11-26 11:53:30,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:30,019 INFO L495 AbstractCegarLoop]: Abstraction has 3817 states and 6203 transitions. [2023-11-26 11:53:30,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.1) internal successors, (341), 10 states have internal predecessors, (341), 3 states have call successors, (230), 2 states have call predecessors, (230), 4 states have return successors, (231), 3 states have call predecessors, (231), 3 states have call successors, (231) [2023-11-26 11:53:30,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3817 states and 6203 transitions. [2023-11-26 11:53:30,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 795 [2023-11-26 11:53:30,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:30,033 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:30,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:30,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:30,249 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:30,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:30,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1380026434, now seen corresponding path program 1 times [2023-11-26 11:53:30,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:30,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986453335] [2023-11-26 11:53:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:30,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:30,340 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:30,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700102982] [2023-11-26 11:53:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:30,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:30,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:30,342 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:30,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2827e8-6c76-48bf-9f76-031d41b76602/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:53:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:31,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:53:31,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 6572 proven. 321 refuted. 0 times theorem prover too weak. 23119 trivial. 0 not checked. [2023-11-26 11:53:32,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 30012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30012 trivial. 0 not checked. [2023-11-26 11:53:32,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:32,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986453335] [2023-11-26 11:53:32,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:32,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700102982] [2023-11-26 11:53:32,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700102982] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:32,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:53:32,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-26 11:53:32,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141426541] [2023-11-26 11:53:32,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:32,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:53:32,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:32,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:53:32,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:53:32,959 INFO L87 Difference]: Start difference. First operand 3817 states and 6203 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) [2023-11-26 11:53:33,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:33,756 INFO L93 Difference]: Finished difference Result 10909 states and 17635 transitions. [2023-11-26 11:53:33,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:53:33,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 1 states have call successors, (123), 1 states have call predecessors, (123), 1 states have return successors, (123), 1 states have call predecessors, (123), 1 states have call successors, (123) Word has length 794 [2023-11-26 11:53:33,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:33,786 INFO L225 Difference]: With dead ends: 10909 [2023-11-26 11:53:33,786 INFO L226 Difference]: Without dead ends: 7317 [2023-11-26 11:53:33,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1588 GetRequests, 1580 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:53:33,799 INFO L413 NwaCegarLoop]: 1239 mSDtfsCounter, 1114 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 2854 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:33,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 2854 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:53:33,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7317 states.