./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/relax-2-2.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_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/relax-2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI --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 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:03:08,041 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:03:08,168 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 22:03:08,175 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:03:08,177 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:03:08,224 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:03:08,225 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:03:08,226 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:03:08,227 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:03:08,233 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:03:08,233 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:03:08,234 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:03:08,235 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:03:08,237 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:03:08,237 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:03:08,238 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:03:08,238 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:03:08,239 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:03:08,239 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:03:08,240 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:03:08,240 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:03:08,241 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:03:08,241 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:03:08,242 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:03:08,242 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:03:08,243 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:03:08,243 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:03:08,244 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:03:08,244 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:03:08,245 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:03:08,246 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:03:08,247 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:03:08,247 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:03:08,247 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:03:08,247 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:03:08,248 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:03:08,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:03:08,248 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:03:08,248 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:03:08,249 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:03:08,249 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:03:08,249 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:03:08,250 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_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef [2023-11-24 22:03:08,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:03:08,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:03:08,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:03:08,636 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:03:08,637 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:03:08,639 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/array-examples/relax-2-2.i [2023-11-24 22:03:12,018 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:03:12,328 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:03:12,329 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/sv-benchmarks/c/array-examples/relax-2-2.i [2023-11-24 22:03:12,343 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/data/972a3b609/3778ef8200d6465ca247ee600507faac/FLAG2dff5dfbc [2023-11-24 22:03:12,358 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/data/972a3b609/3778ef8200d6465ca247ee600507faac [2023-11-24 22:03:12,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:03:12,363 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:03:12,365 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:03:12,365 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:03:12,371 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:03:12,372 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:03:12" (1/1) ... [2023-11-24 22:03:12,373 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@655bf04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:12, skipping insertion in model container [2023-11-24 22:03:12,373 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:03:12" (1/1) ... [2023-11-24 22:03:12,422 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:03:12,628 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_44b08365-a4e0-4e56-a4d0-53b26a5c5198/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2023-11-24 22:03:12,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:03:12,858 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:03:12,876 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_44b08365-a4e0-4e56-a4d0-53b26a5c5198/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2023-11-24 22:03:12,953 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:03:12,993 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:03:12,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:12 WrapperNode [2023-11-24 22:03:12,994 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:03:12,996 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:03:12,997 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:03:12,997 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:03:13,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:12" (1/1) ... [2023-11-24 22:03:13,031 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:12" (1/1) ... [2023-11-24 22:03:13,071 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148 [2023-11-24 22:03:13,071 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:03:13,072 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:03:13,073 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:03:13,073 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:03:13,085 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:12" (1/1) ... [2023-11-24 22:03:13,086 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:12" (1/1) ... [2023-11-24 22:03:13,092 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:12" (1/1) ... [2023-11-24 22:03:13,108 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 6, 6]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-24 22:03:13,108 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:12" (1/1) ... [2023-11-24 22:03:13,109 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:12" (1/1) ... [2023-11-24 22:03:13,117 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:12" (1/1) ... [2023-11-24 22:03:13,122 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:12" (1/1) ... [2023-11-24 22:03:13,124 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:12" (1/1) ... [2023-11-24 22:03:13,126 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:12" (1/1) ... [2023-11-24 22:03:13,130 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:03:13,132 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:03:13,132 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:03:13,132 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:03:13,133 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:12" (1/1) ... [2023-11-24 22:03:13,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:03:13,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:13,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:03:13,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:03:13,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 22:03:13,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 22:03:13,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 22:03:13,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 22:03:13,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 22:03:13,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:03:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:03:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 22:03:13,209 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 22:03:13,210 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 22:03:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 22:03:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:03:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:03:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:03:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 22:03:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:03:13,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:03:13,340 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:03:13,342 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:03:13,696 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:03:13,732 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:03:13,732 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-24 22:03:13,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:03:13 BoogieIcfgContainer [2023-11-24 22:03:13,733 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:03:13,743 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:03:13,743 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:03:13,747 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:03:13,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:03:12" (1/3) ... [2023-11-24 22:03:13,748 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f3e8f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:03:13, skipping insertion in model container [2023-11-24 22:03:13,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:03:12" (2/3) ... [2023-11-24 22:03:13,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f3e8f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:03:13, skipping insertion in model container [2023-11-24 22:03:13,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:03:13" (3/3) ... [2023-11-24 22:03:13,779 INFO L112 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2023-11-24 22:03:13,836 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:03:13,836 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 22:03:13,919 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:03:13,928 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;@3134a76d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:03:13,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 22:03:13,934 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 22:03:13,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 22:03:13,946 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:13,946 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:13,947 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:13,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:13,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1395958249, now seen corresponding path program 1 times [2023-11-24 22:03:13,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:13,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418617619] [2023-11-24 22:03:13,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:13,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:14,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:14,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 22:03:14,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:14,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418617619] [2023-11-24 22:03:14,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418617619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:14,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:14,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:03:14,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097285907] [2023-11-24 22:03:14,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:14,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 22:03:14,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:14,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 22:03:14,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 22:03:14,382 INFO L87 Difference]: Start difference. First operand has 53 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 22:03:14,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:14,441 INFO L93 Difference]: Finished difference Result 104 states and 166 transitions. [2023-11-24 22:03:14,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 22:03:14,444 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-11-24 22:03:14,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:14,456 INFO L225 Difference]: With dead ends: 104 [2023-11-24 22:03:14,457 INFO L226 Difference]: Without dead ends: 49 [2023-11-24 22:03:14,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 22:03:14,468 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:14,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:03:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-24 22:03:14,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-24 22:03:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 40 states have internal predecessors, (55), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:03:14,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2023-11-24 22:03:14,533 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 23 [2023-11-24 22:03:14,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:14,534 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2023-11-24 22:03:14,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 22:03:14,535 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2023-11-24 22:03:14,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 22:03:14,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:14,539 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:14,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:03:14,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:14,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:14,542 INFO L85 PathProgramCache]: Analyzing trace with hash -701553879, now seen corresponding path program 1 times [2023-11-24 22:03:14,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:14,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80698223] [2023-11-24 22:03:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:14,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:14,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:14,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 22:03:14,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:14,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80698223] [2023-11-24 22:03:14,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80698223] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:14,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:14,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:03:14,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319772689] [2023-11-24 22:03:14,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:14,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:03:14,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:14,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:03:14,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:03:14,998 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:15,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:15,095 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2023-11-24 22:03:15,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:03:15,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-11-24 22:03:15,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:15,098 INFO L225 Difference]: With dead ends: 83 [2023-11-24 22:03:15,098 INFO L226 Difference]: Without dead ends: 58 [2023-11-24 22:03:15,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:03:15,101 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 11 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:15,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 184 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:03:15,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-24 22:03:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2023-11-24 22:03:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 42 states have internal predecessors, (57), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:03:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2023-11-24 22:03:15,114 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 23 [2023-11-24 22:03:15,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:15,115 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2023-11-24 22:03:15,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:15,116 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2023-11-24 22:03:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-24 22:03:15,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:15,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:15,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:03:15,119 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:15,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:15,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1954555270, now seen corresponding path program 1 times [2023-11-24 22:03:15,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:15,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829679205] [2023-11-24 22:03:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:15,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:15,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:15,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:15,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 22:03:15,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:15,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829679205] [2023-11-24 22:03:15,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829679205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:15,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:15,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 22:03:15,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448913879] [2023-11-24 22:03:15,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:15,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:03:15,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:15,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:03:15,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:03:15,547 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:15,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:15,690 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2023-11-24 22:03:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 22:03:15,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-11-24 22:03:15,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:15,693 INFO L225 Difference]: With dead ends: 108 [2023-11-24 22:03:15,693 INFO L226 Difference]: Without dead ends: 71 [2023-11-24 22:03:15,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 22:03:15,696 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 24 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:15,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 270 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:03:15,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-24 22:03:15,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2023-11-24 22:03:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.396551724137931) internal successors, (81), 59 states have internal predecessors, (81), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:03:15,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 94 transitions. [2023-11-24 22:03:15,709 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 94 transitions. Word has length 26 [2023-11-24 22:03:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:15,710 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 94 transitions. [2023-11-24 22:03:15,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:15,711 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 94 transitions. [2023-11-24 22:03:15,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 22:03:15,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:15,712 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:15,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:03:15,713 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:15,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:15,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1323951562, now seen corresponding path program 1 times [2023-11-24 22:03:15,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:15,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421767572] [2023-11-24 22:03:15,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:15,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:16,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:16,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 22:03:16,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:16,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421767572] [2023-11-24 22:03:16,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421767572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:16,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571352319] [2023-11-24 22:03:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:16,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:16,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:16,448 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:16,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 22:03:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:16,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 22:03:16,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:03:16,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:16,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571352319] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:16,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:03:16,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2023-11-24 22:03:16,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548827128] [2023-11-24 22:03:16,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:16,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:03:16,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:16,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:03:16,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-24 22:03:16,881 INFO L87 Difference]: Start difference. First operand 68 states and 94 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:17,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:17,070 INFO L93 Difference]: Finished difference Result 80 states and 105 transitions. [2023-11-24 22:03:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 22:03:17,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-11-24 22:03:17,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:17,072 INFO L225 Difference]: With dead ends: 80 [2023-11-24 22:03:17,073 INFO L226 Difference]: Without dead ends: 78 [2023-11-24 22:03:17,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-24 22:03:17,075 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 48 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:17,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 203 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:03:17,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-24 22:03:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2023-11-24 22:03:17,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 62 states have internal predecessors, (84), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:03:17,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2023-11-24 22:03:17,102 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 27 [2023-11-24 22:03:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:17,103 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2023-11-24 22:03:17,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:17,104 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2023-11-24 22:03:17,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 22:03:17,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:17,106 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:17,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:17,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:17,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:17,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:17,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1366182202, now seen corresponding path program 1 times [2023-11-24 22:03:17,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:17,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313705333] [2023-11-24 22:03:17,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:17,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:17,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:17,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 22:03:17,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:17,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313705333] [2023-11-24 22:03:17,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313705333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:17,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:17,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 22:03:17,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405686886] [2023-11-24 22:03:17,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:17,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:03:17,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:17,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:03:17,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:03:17,766 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:18,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:18,080 INFO L93 Difference]: Finished difference Result 114 states and 150 transitions. [2023-11-24 22:03:18,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 22:03:18,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-11-24 22:03:18,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:18,083 INFO L225 Difference]: With dead ends: 114 [2023-11-24 22:03:18,083 INFO L226 Difference]: Without dead ends: 101 [2023-11-24 22:03:18,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-24 22:03:18,085 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 62 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:18,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 434 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 22:03:18,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-24 22:03:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2023-11-24 22:03:18,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 71 states have internal predecessors, (97), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:03:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 110 transitions. [2023-11-24 22:03:18,106 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 110 transitions. Word has length 27 [2023-11-24 22:03:18,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:18,107 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 110 transitions. [2023-11-24 22:03:18,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:18,107 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 110 transitions. [2023-11-24 22:03:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-24 22:03:18,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:18,109 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:18,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:03:18,110 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:18,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:18,110 INFO L85 PathProgramCache]: Analyzing trace with hash -81168152, now seen corresponding path program 1 times [2023-11-24 22:03:18,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:18,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269015997] [2023-11-24 22:03:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:18,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:18,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:18,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 22:03:18,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:18,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269015997] [2023-11-24 22:03:18,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269015997] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:18,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947981377] [2023-11-24 22:03:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:18,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:18,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:18,564 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:18,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 22:03:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:18,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 22:03:18,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:03:18,758 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:18,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947981377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:18,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:03:18,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-24 22:03:18,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933936133] [2023-11-24 22:03:18,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:18,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:03:18,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:18,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:03:18,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-24 22:03:18,761 INFO L87 Difference]: Start difference. First operand 81 states and 110 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:18,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:18,864 INFO L93 Difference]: Finished difference Result 102 states and 133 transitions. [2023-11-24 22:03:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:03:18,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-11-24 22:03:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:18,867 INFO L225 Difference]: With dead ends: 102 [2023-11-24 22:03:18,867 INFO L226 Difference]: Without dead ends: 81 [2023-11-24 22:03:18,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-24 22:03:18,869 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 12 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:18,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 146 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:03:18,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-24 22:03:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-24 22:03:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.3571428571428572) internal successors, (95), 71 states have internal predecessors, (95), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:03:18,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 108 transitions. [2023-11-24 22:03:18,889 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 108 transitions. Word has length 28 [2023-11-24 22:03:18,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:18,889 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 108 transitions. [2023-11-24 22:03:18,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:18,890 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 108 transitions. [2023-11-24 22:03:18,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 22:03:18,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:18,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:18,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:19,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:19,100 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:19,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:19,101 INFO L85 PathProgramCache]: Analyzing trace with hash -167710709, now seen corresponding path program 1 times [2023-11-24 22:03:19,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:19,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947769825] [2023-11-24 22:03:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:19,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:19,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:19,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 22:03:19,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:19,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947769825] [2023-11-24 22:03:19,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947769825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:19,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:19,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:03:19,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434973748] [2023-11-24 22:03:19,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:19,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:03:19,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:19,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:03:19,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:03:19,205 INFO L87 Difference]: Start difference. First operand 81 states and 108 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:19,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:19,256 INFO L93 Difference]: Finished difference Result 100 states and 129 transitions. [2023-11-24 22:03:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:03:19,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-11-24 22:03:19,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:19,258 INFO L225 Difference]: With dead ends: 100 [2023-11-24 22:03:19,259 INFO L226 Difference]: Without dead ends: 79 [2023-11-24 22:03:19,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:03:19,261 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 17 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:19,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 162 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:03:19,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-24 22:03:19,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-11-24 22:03:19,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 69 states have internal predecessors, (90), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:03:19,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2023-11-24 22:03:19,288 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 30 [2023-11-24 22:03:19,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:19,289 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2023-11-24 22:03:19,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2023-11-24 22:03:19,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 22:03:19,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:19,295 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:19,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 22:03:19,296 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:19,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:19,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1120807757, now seen corresponding path program 1 times [2023-11-24 22:03:19,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:19,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442699493] [2023-11-24 22:03:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:19,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:19,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:19,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 22:03:19,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:19,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442699493] [2023-11-24 22:03:19,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442699493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:19,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:19,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:03:19,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520285196] [2023-11-24 22:03:19,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:19,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:19,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:19,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:19,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:19,359 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:19,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:19,403 INFO L93 Difference]: Finished difference Result 117 states and 152 transitions. [2023-11-24 22:03:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:19,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-11-24 22:03:19,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:19,406 INFO L225 Difference]: With dead ends: 117 [2023-11-24 22:03:19,406 INFO L226 Difference]: Without dead ends: 94 [2023-11-24 22:03:19,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:03:19,411 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 5 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:19,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 117 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:03:19,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-24 22:03:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2023-11-24 22:03:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 82 states have (on average 1.3170731707317074) internal successors, (108), 83 states have internal predecessors, (108), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:03:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 121 transitions. [2023-11-24 22:03:19,444 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 121 transitions. Word has length 30 [2023-11-24 22:03:19,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:19,444 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 121 transitions. [2023-11-24 22:03:19,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:19,445 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 121 transitions. [2023-11-24 22:03:19,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-24 22:03:19,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:19,450 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:19,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 22:03:19,450 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:19,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:19,451 INFO L85 PathProgramCache]: Analyzing trace with hash -621149053, now seen corresponding path program 1 times [2023-11-24 22:03:19,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:19,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058372468] [2023-11-24 22:03:19,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:19,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:19,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:19,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 22:03:19,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:19,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058372468] [2023-11-24 22:03:19,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058372468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:19,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:19,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 22:03:19,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025840879] [2023-11-24 22:03:19,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:19,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:03:19,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:19,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:03:19,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:03:19,731 INFO L87 Difference]: Start difference. First operand 93 states and 121 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:19,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:19,868 INFO L93 Difference]: Finished difference Result 165 states and 211 transitions. [2023-11-24 22:03:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 22:03:19,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2023-11-24 22:03:19,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:19,870 INFO L225 Difference]: With dead ends: 165 [2023-11-24 22:03:19,870 INFO L226 Difference]: Without dead ends: 84 [2023-11-24 22:03:19,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-24 22:03:19,872 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 16 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:19,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 212 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:03:19,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-24 22:03:19,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-11-24 22:03:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 74 states have internal predecessors, (95), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:03:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 108 transitions. [2023-11-24 22:03:19,909 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 108 transitions. Word has length 34 [2023-11-24 22:03:19,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:19,910 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 108 transitions. [2023-11-24 22:03:19,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:19,910 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 108 transitions. [2023-11-24 22:03:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 22:03:19,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:19,911 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:19,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 22:03:19,911 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:19,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:19,912 INFO L85 PathProgramCache]: Analyzing trace with hash -442531397, now seen corresponding path program 1 times [2023-11-24 22:03:19,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:19,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917731931] [2023-11-24 22:03:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:19,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:20,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:20,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:03:20,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:20,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917731931] [2023-11-24 22:03:20,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917731931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:20,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42853262] [2023-11-24 22:03:20,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:20,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:20,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:20,368 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:20,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 22:03:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:20,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 22:03:20,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:03:20,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:03:20,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42853262] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:20,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:20,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2023-11-24 22:03:20,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516376362] [2023-11-24 22:03:20,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:20,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 22:03:20,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:20,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 22:03:20,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-24 22:03:20,841 INFO L87 Difference]: Start difference. First operand 84 states and 108 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:21,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:21,545 INFO L93 Difference]: Finished difference Result 152 states and 199 transitions. [2023-11-24 22:03:21,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 22:03:21,547 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2023-11-24 22:03:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:21,549 INFO L225 Difference]: With dead ends: 152 [2023-11-24 22:03:21,549 INFO L226 Difference]: Without dead ends: 111 [2023-11-24 22:03:21,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2023-11-24 22:03:21,552 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 62 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:21,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 732 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 22:03:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-24 22:03:21,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 77. [2023-11-24 22:03:21,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 67 states have internal predecessors, (89), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:03:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2023-11-24 22:03:21,571 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 35 [2023-11-24 22:03:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:21,572 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2023-11-24 22:03:21,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:21,572 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2023-11-24 22:03:21,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-24 22:03:21,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:21,573 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:21,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:21,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:21,780 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:21,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:21,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1321181741, now seen corresponding path program 1 times [2023-11-24 22:03:21,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:21,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277449933] [2023-11-24 22:03:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:21,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:21,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:21,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 22:03:21,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:21,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277449933] [2023-11-24 22:03:21,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277449933] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:21,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291070693] [2023-11-24 22:03:21,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:21,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:21,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:21,999 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:22,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 22:03:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:22,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 22:03:22,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:03:22,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:03:22,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291070693] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:22,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:22,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 14 [2023-11-24 22:03:22,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304588061] [2023-11-24 22:03:22,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:22,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 22:03:22,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:22,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 22:03:22,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-24 22:03:22,379 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:22,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:22,739 INFO L93 Difference]: Finished difference Result 159 states and 210 transitions. [2023-11-24 22:03:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 22:03:22,740 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-11-24 22:03:22,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:22,744 INFO L225 Difference]: With dead ends: 159 [2023-11-24 22:03:22,745 INFO L226 Difference]: Without dead ends: 109 [2023-11-24 22:03:22,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-24 22:03:22,746 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 70 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:22,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 592 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 22:03:22,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-24 22:03:22,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 81. [2023-11-24 22:03:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.289855072463768) internal successors, (89), 70 states have internal predecessors, (89), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 22:03:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2023-11-24 22:03:22,769 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 36 [2023-11-24 22:03:22,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:22,769 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2023-11-24 22:03:22,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:22,770 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2023-11-24 22:03:22,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-24 22:03:22,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:22,771 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:22,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:22,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:22,980 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:22,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:22,980 INFO L85 PathProgramCache]: Analyzing trace with hash 976824505, now seen corresponding path program 1 times [2023-11-24 22:03:22,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:22,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078071109] [2023-11-24 22:03:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:22,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:23,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:23,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:03:23,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:23,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078071109] [2023-11-24 22:03:23,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078071109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:23,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602521538] [2023-11-24 22:03:23,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:23,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:23,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:23,391 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:23,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 22:03:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:23,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 22:03:23,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 22:03:23,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 22:03:23,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602521538] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:23,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:03:23,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 14 [2023-11-24 22:03:23,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104227680] [2023-11-24 22:03:23,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:23,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:03:23,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:23,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:03:23,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-24 22:03:23,875 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:23,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:23,968 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2023-11-24 22:03:23,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:03:23,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-11-24 22:03:23,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:23,970 INFO L225 Difference]: With dead ends: 91 [2023-11-24 22:03:23,971 INFO L226 Difference]: Without dead ends: 82 [2023-11-24 22:03:23,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-24 22:03:23,972 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 52 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:23,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 114 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:03:23,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-24 22:03:23,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-11-24 22:03:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.2857142857142858) internal successors, (90), 71 states have internal predecessors, (90), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 22:03:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2023-11-24 22:03:23,989 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 37 [2023-11-24 22:03:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:23,990 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2023-11-24 22:03:23,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2023-11-24 22:03:23,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-24 22:03:23,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:23,992 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:24,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-24 22:03:24,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:24,207 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:24,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:24,208 INFO L85 PathProgramCache]: Analyzing trace with hash -2132065923, now seen corresponding path program 1 times [2023-11-24 22:03:24,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:24,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718305002] [2023-11-24 22:03:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:24,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:24,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:24,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:24,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-24 22:03:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:03:24,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:24,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718305002] [2023-11-24 22:03:24,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718305002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:24,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107532088] [2023-11-24 22:03:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:24,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:24,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:24,423 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:24,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 22:03:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:24,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 22:03:24,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 22:03:24,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:24,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107532088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:24,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:03:24,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-11-24 22:03:24,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785655987] [2023-11-24 22:03:24,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:24,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:03:24,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:24,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:03:24,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-24 22:03:24,708 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 22:03:24,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:24,936 INFO L93 Difference]: Finished difference Result 124 states and 156 transitions. [2023-11-24 22:03:24,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 22:03:24,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2023-11-24 22:03:24,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:24,938 INFO L225 Difference]: With dead ends: 124 [2023-11-24 22:03:24,938 INFO L226 Difference]: Without dead ends: 87 [2023-11-24 22:03:24,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-24 22:03:24,940 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 19 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:24,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 221 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 22:03:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-24 22:03:24,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2023-11-24 22:03:24,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 71 states have (on average 1.267605633802817) internal successors, (90), 72 states have internal predecessors, (90), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 22:03:24,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2023-11-24 22:03:24,960 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 40 [2023-11-24 22:03:24,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:24,960 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2023-11-24 22:03:24,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 22:03:24,961 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2023-11-24 22:03:24,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-24 22:03:24,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:24,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:24,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:25,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 22:03:25,169 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:25,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:25,170 INFO L85 PathProgramCache]: Analyzing trace with hash 369673381, now seen corresponding path program 1 times [2023-11-24 22:03:25,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:25,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278639381] [2023-11-24 22:03:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:25,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:25,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:25,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 22:03:25,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:25,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278639381] [2023-11-24 22:03:25,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278639381] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:25,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219148662] [2023-11-24 22:03:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:25,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:25,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:25,435 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:25,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 22:03:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:25,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-24 22:03:25,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:03:25,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 22:03:26,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219148662] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:26,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:26,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 20 [2023-11-24 22:03:26,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970213750] [2023-11-24 22:03:26,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:26,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 22:03:26,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:26,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 22:03:26,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-11-24 22:03:26,088 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 20 states, 17 states have (on average 3.823529411764706) internal successors, (65), 18 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:27,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:27,049 INFO L93 Difference]: Finished difference Result 223 states and 305 transitions. [2023-11-24 22:03:27,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-24 22:03:27,050 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.823529411764706) internal successors, (65), 18 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-11-24 22:03:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:27,052 INFO L225 Difference]: With dead ends: 223 [2023-11-24 22:03:27,052 INFO L226 Difference]: Without dead ends: 201 [2023-11-24 22:03:27,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-11-24 22:03:27,054 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 279 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:27,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 828 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 22:03:27,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-24 22:03:27,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 100. [2023-11-24 22:03:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 88 states have (on average 1.3068181818181819) internal successors, (115), 89 states have internal predecessors, (115), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 22:03:27,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2023-11-24 22:03:27,100 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 40 [2023-11-24 22:03:27,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:27,103 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2023-11-24 22:03:27,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.823529411764706) internal successors, (65), 18 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2023-11-24 22:03:27,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-24 22:03:27,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:27,104 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:27,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:27,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:27,311 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:27,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:27,312 INFO L85 PathProgramCache]: Analyzing trace with hash 371520423, now seen corresponding path program 1 times [2023-11-24 22:03:27,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:27,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073334042] [2023-11-24 22:03:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:27,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:27,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:27,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 22:03:27,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:27,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073334042] [2023-11-24 22:03:27,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073334042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:27,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963519902] [2023-11-24 22:03:27,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:27,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:27,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:27,602 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:27,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 22:03:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:27,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 22:03:27,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 22:03:27,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 22:03:28,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963519902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:28,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:28,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-24 22:03:28,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232071630] [2023-11-24 22:03:28,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:28,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 22:03:28,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:28,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 22:03:28,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-24 22:03:28,096 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:28,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:28,478 INFO L93 Difference]: Finished difference Result 210 states and 283 transitions. [2023-11-24 22:03:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 22:03:28,479 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-11-24 22:03:28,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:28,481 INFO L225 Difference]: With dead ends: 210 [2023-11-24 22:03:28,481 INFO L226 Difference]: Without dead ends: 185 [2023-11-24 22:03:28,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-11-24 22:03:28,482 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 132 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:28,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 722 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 22:03:28,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-24 22:03:28,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2023-11-24 22:03:28,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 132 states have (on average 1.3181818181818181) internal successors, (174), 133 states have internal predecessors, (174), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 22:03:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 191 transitions. [2023-11-24 22:03:28,514 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 191 transitions. Word has length 40 [2023-11-24 22:03:28,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:28,514 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 191 transitions. [2023-11-24 22:03:28,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:28,515 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 191 transitions. [2023-11-24 22:03:28,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-24 22:03:28,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:28,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:28,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:28,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:28,723 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:28,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:28,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1049731751, now seen corresponding path program 1 times [2023-11-24 22:03:28,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:28,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181157562] [2023-11-24 22:03:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:28,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:29,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:29,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 22:03:29,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:29,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181157562] [2023-11-24 22:03:29,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181157562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:29,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634202010] [2023-11-24 22:03:29,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:29,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:29,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:29,721 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:29,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 22:03:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:29,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-24 22:03:29,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:29,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 22:03:30,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-24 22:03:30,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-24 22:03:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:03:30,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:30,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 22:03:30,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2023-11-24 22:03:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 22:03:30,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634202010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:30,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:30,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2023-11-24 22:03:30,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271955720] [2023-11-24 22:03:30,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:30,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 22:03:30,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:30,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 22:03:30,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2023-11-24 22:03:30,646 INFO L87 Difference]: Start difference. First operand 145 states and 191 transitions. Second operand has 26 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:31,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:31,549 INFO L93 Difference]: Finished difference Result 297 states and 399 transitions. [2023-11-24 22:03:31,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-24 22:03:31,549 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-11-24 22:03:31,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:31,551 INFO L225 Difference]: With dead ends: 297 [2023-11-24 22:03:31,552 INFO L226 Difference]: Without dead ends: 248 [2023-11-24 22:03:31,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2023-11-24 22:03:31,553 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 217 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:31,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 948 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 22:03:31,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-24 22:03:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 171. [2023-11-24 22:03:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 158 states have (on average 1.3291139240506329) internal successors, (210), 159 states have internal predecessors, (210), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 22:03:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 227 transitions. [2023-11-24 22:03:31,600 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 227 transitions. Word has length 40 [2023-11-24 22:03:31,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:31,600 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 227 transitions. [2023-11-24 22:03:31,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:31,601 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 227 transitions. [2023-11-24 22:03:31,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-24 22:03:31,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:31,602 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:31,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:31,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 22:03:31,808 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:31,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:31,809 INFO L85 PathProgramCache]: Analyzing trace with hash 626139043, now seen corresponding path program 2 times [2023-11-24 22:03:31,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:31,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462696946] [2023-11-24 22:03:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:31,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:32,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:32,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:03:32,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:32,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462696946] [2023-11-24 22:03:32,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462696946] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:32,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929001712] [2023-11-24 22:03:32,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:03:32,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:32,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:32,245 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:32,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 22:03:32,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-24 22:03:32,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:03:32,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 22:03:32,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 22:03:32,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:03:32,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929001712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:32,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:03:32,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-11-24 22:03:32,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380457611] [2023-11-24 22:03:32,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:32,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:03:32,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:32,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:03:32,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-24 22:03:32,447 INFO L87 Difference]: Start difference. First operand 171 states and 227 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:32,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:32,588 INFO L93 Difference]: Finished difference Result 251 states and 331 transitions. [2023-11-24 22:03:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:03:32,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2023-11-24 22:03:32,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:32,591 INFO L225 Difference]: With dead ends: 251 [2023-11-24 22:03:32,591 INFO L226 Difference]: Without dead ends: 242 [2023-11-24 22:03:32,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-24 22:03:32,592 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 18 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:32,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 176 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:03:32,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-11-24 22:03:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 171. [2023-11-24 22:03:32,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 158 states have (on average 1.3291139240506329) internal successors, (210), 159 states have internal predecessors, (210), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 22:03:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 227 transitions. [2023-11-24 22:03:32,656 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 227 transitions. Word has length 41 [2023-11-24 22:03:32,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:32,657 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 227 transitions. [2023-11-24 22:03:32,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:32,657 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 227 transitions. [2023-11-24 22:03:32,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-24 22:03:32,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:32,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:32,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:32,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-24 22:03:32,865 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:32,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:32,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1745918047, now seen corresponding path program 1 times [2023-11-24 22:03:32,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:32,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056620543] [2023-11-24 22:03:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:32,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:33,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:33,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 22:03:33,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:33,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056620543] [2023-11-24 22:03:33,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056620543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:33,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707415140] [2023-11-24 22:03:33,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:33,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:33,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:33,359 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:33,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 22:03:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:33,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 22:03:33,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 22:03:33,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 22:03:33,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707415140] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:33,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:33,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2023-11-24 22:03:33,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704066869] [2023-11-24 22:03:33,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:33,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 22:03:33,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:33,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 22:03:33,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-11-24 22:03:33,867 INFO L87 Difference]: Start difference. First operand 171 states and 227 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:35,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:35,103 INFO L93 Difference]: Finished difference Result 412 states and 557 transitions. [2023-11-24 22:03:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-24 22:03:35,104 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2023-11-24 22:03:35,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:35,107 INFO L225 Difference]: With dead ends: 412 [2023-11-24 22:03:35,107 INFO L226 Difference]: Without dead ends: 397 [2023-11-24 22:03:35,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2023-11-24 22:03:35,109 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 243 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:35,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 1206 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 22:03:35,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-11-24 22:03:35,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 204. [2023-11-24 22:03:35,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 191 states have (on average 1.3350785340314135) internal successors, (255), 192 states have internal predecessors, (255), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 22:03:35,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 272 transitions. [2023-11-24 22:03:35,174 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 272 transitions. Word has length 41 [2023-11-24 22:03:35,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:35,175 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 272 transitions. [2023-11-24 22:03:35,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:35,176 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 272 transitions. [2023-11-24 22:03:35,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-24 22:03:35,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:35,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:35,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:35,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-24 22:03:35,385 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:35,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:35,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1846631785, now seen corresponding path program 1 times [2023-11-24 22:03:35,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:35,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899868766] [2023-11-24 22:03:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:35,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:35,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:35,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:35,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-24 22:03:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 22:03:35,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:35,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899868766] [2023-11-24 22:03:35,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899868766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:35,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336805253] [2023-11-24 22:03:35,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:35,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:35,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:35,628 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:35,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 22:03:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:35,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 22:03:35,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:03:35,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 22:03:36,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336805253] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:36,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:03:36,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 8] total 13 [2023-11-24 22:03:36,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819234682] [2023-11-24 22:03:36,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:36,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:03:36,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:36,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:03:36,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-24 22:03:36,003 INFO L87 Difference]: Start difference. First operand 204 states and 272 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 22:03:36,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:36,133 INFO L93 Difference]: Finished difference Result 234 states and 311 transitions. [2023-11-24 22:03:36,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:03:36,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2023-11-24 22:03:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:36,136 INFO L225 Difference]: With dead ends: 234 [2023-11-24 22:03:36,136 INFO L226 Difference]: Without dead ends: 213 [2023-11-24 22:03:36,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-24 22:03:36,137 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 5 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:36,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 116 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:03:36,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-24 22:03:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2023-11-24 22:03:36,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 195 states have (on average 1.3384615384615384) internal successors, (261), 196 states have internal predecessors, (261), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 22:03:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 278 transitions. [2023-11-24 22:03:36,191 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 278 transitions. Word has length 43 [2023-11-24 22:03:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:36,192 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 278 transitions. [2023-11-24 22:03:36,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 22:03:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 278 transitions. [2023-11-24 22:03:36,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-24 22:03:36,193 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:36,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:36,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:36,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:36,400 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:36,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:36,401 INFO L85 PathProgramCache]: Analyzing trace with hash 78334701, now seen corresponding path program 1 times [2023-11-24 22:03:36,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:36,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957880589] [2023-11-24 22:03:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:36,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:36,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:36,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 22:03:36,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:36,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957880589] [2023-11-24 22:03:36,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957880589] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:36,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255983456] [2023-11-24 22:03:36,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:36,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:36,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:36,773 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:36,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-24 22:03:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:36,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-24 22:03:36,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 22:03:37,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 22:03:37,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255983456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:37,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:37,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2023-11-24 22:03:37,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492127361] [2023-11-24 22:03:37,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:37,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 22:03:37,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:37,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 22:03:37,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-11-24 22:03:37,243 INFO L87 Difference]: Start difference. First operand 208 states and 278 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:37,766 INFO L93 Difference]: Finished difference Result 335 states and 439 transitions. [2023-11-24 22:03:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 22:03:37,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-11-24 22:03:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:37,769 INFO L225 Difference]: With dead ends: 335 [2023-11-24 22:03:37,769 INFO L226 Difference]: Without dead ends: 252 [2023-11-24 22:03:37,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-11-24 22:03:37,771 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 101 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:37,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 570 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 22:03:37,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-24 22:03:37,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 198. [2023-11-24 22:03:37,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 185 states have (on average 1.308108108108108) internal successors, (242), 186 states have internal predecessors, (242), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 22:03:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2023-11-24 22:03:37,834 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 43 [2023-11-24 22:03:37,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:37,834 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2023-11-24 22:03:37,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:37,834 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2023-11-24 22:03:37,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-24 22:03:37,836 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:37,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:37,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:38,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:38,042 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:38,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:38,043 INFO L85 PathProgramCache]: Analyzing trace with hash 276110981, now seen corresponding path program 1 times [2023-11-24 22:03:38,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:38,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322619412] [2023-11-24 22:03:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:38,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:39,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:39,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 22:03:39,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:39,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322619412] [2023-11-24 22:03:39,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322619412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:39,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17551645] [2023-11-24 22:03:39,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:39,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:39,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:39,280 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:39,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-24 22:03:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:39,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-24 22:03:39,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:39,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 22:03:41,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-24 22:03:41,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-24 22:03:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 22:03:41,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:41,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 22:03:41,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2023-11-24 22:03:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 22:03:42,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17551645] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:42,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:42,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 13] total 45 [2023-11-24 22:03:42,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934912371] [2023-11-24 22:03:42,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:42,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-24 22:03:42,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:42,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-24 22:03:42,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2023-11-24 22:03:42,189 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 22:03:43,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:43,839 INFO L93 Difference]: Finished difference Result 342 states and 448 transitions. [2023-11-24 22:03:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 22:03:43,841 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-11-24 22:03:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:43,843 INFO L225 Difference]: With dead ends: 342 [2023-11-24 22:03:43,843 INFO L226 Difference]: Without dead ends: 252 [2023-11-24 22:03:43,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=322, Invalid=2228, Unknown=0, NotChecked=0, Total=2550 [2023-11-24 22:03:43,847 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 222 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:43,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1153 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 22:03:43,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-24 22:03:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 210. [2023-11-24 22:03:43,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 197 states have (on average 1.299492385786802) internal successors, (256), 198 states have internal predecessors, (256), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 22:03:43,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 273 transitions. [2023-11-24 22:03:43,913 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 273 transitions. Word has length 44 [2023-11-24 22:03:43,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:43,914 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 273 transitions. [2023-11-24 22:03:43,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 22:03:43,914 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 273 transitions. [2023-11-24 22:03:43,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-24 22:03:43,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:43,916 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:43,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-24 22:03:44,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:44,128 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:44,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:44,128 INFO L85 PathProgramCache]: Analyzing trace with hash 987470701, now seen corresponding path program 2 times [2023-11-24 22:03:44,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:44,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271484370] [2023-11-24 22:03:44,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:44,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:44,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:44,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 22:03:44,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:44,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271484370] [2023-11-24 22:03:44,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271484370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:44,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421905907] [2023-11-24 22:03:44,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:03:44,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:44,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:44,482 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:44,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-24 22:03:44,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 22:03:44,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:03:44,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 22:03:44,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 22:03:44,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 22:03:45,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421905907] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:45,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:45,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 20 [2023-11-24 22:03:45,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683193831] [2023-11-24 22:03:45,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:45,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 22:03:45,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:45,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 22:03:45,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-11-24 22:03:45,212 INFO L87 Difference]: Start difference. First operand 210 states and 273 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:46,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:46,418 INFO L93 Difference]: Finished difference Result 873 states and 1164 transitions. [2023-11-24 22:03:46,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-24 22:03:46,427 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-11-24 22:03:46,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:46,437 INFO L225 Difference]: With dead ends: 873 [2023-11-24 22:03:46,437 INFO L226 Difference]: Without dead ends: 756 [2023-11-24 22:03:46,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2023-11-24 22:03:46,439 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 190 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:46,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1145 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 22:03:46,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2023-11-24 22:03:46,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 278. [2023-11-24 22:03:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 265 states have (on average 1.320754716981132) internal successors, (350), 266 states have internal predecessors, (350), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 22:03:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 367 transitions. [2023-11-24 22:03:46,532 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 367 transitions. Word has length 45 [2023-11-24 22:03:46,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:46,533 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 367 transitions. [2023-11-24 22:03:46,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 367 transitions. [2023-11-24 22:03:46,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-24 22:03:46,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:46,534 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:46,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:46,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-24 22:03:46,741 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:46,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:46,741 INFO L85 PathProgramCache]: Analyzing trace with hash 515764589, now seen corresponding path program 3 times [2023-11-24 22:03:46,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:46,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332988276] [2023-11-24 22:03:46,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:46,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:47,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:47,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 22:03:47,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:47,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332988276] [2023-11-24 22:03:47,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332988276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:47,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158975322] [2023-11-24 22:03:47,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 22:03:47,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:47,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:47,353 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:47,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-24 22:03:47,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 22:03:47,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:03:47,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 22:03:47,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-24 22:03:47,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-24 22:03:48,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158975322] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:48,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:48,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 26 [2023-11-24 22:03:48,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833864744] [2023-11-24 22:03:48,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:48,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 22:03:48,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:48,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 22:03:48,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-11-24 22:03:48,072 INFO L87 Difference]: Start difference. First operand 278 states and 367 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:49,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:49,588 INFO L93 Difference]: Finished difference Result 616 states and 821 transitions. [2023-11-24 22:03:49,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-24 22:03:49,588 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2023-11-24 22:03:49,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:49,592 INFO L225 Difference]: With dead ends: 616 [2023-11-24 22:03:49,592 INFO L226 Difference]: Without dead ends: 607 [2023-11-24 22:03:49,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2023-11-24 22:03:49,594 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 347 mSDsluCounter, 1933 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:49,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 2081 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 22:03:49,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2023-11-24 22:03:49,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 253. [2023-11-24 22:03:49,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 240 states have (on average 1.3125) internal successors, (315), 241 states have internal predecessors, (315), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 22:03:49,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 332 transitions. [2023-11-24 22:03:49,687 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 332 transitions. Word has length 47 [2023-11-24 22:03:49,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:49,688 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 332 transitions. [2023-11-24 22:03:49,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:49,688 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 332 transitions. [2023-11-24 22:03:49,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-24 22:03:49,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:49,690 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:49,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:49,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-24 22:03:49,896 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:49,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:49,896 INFO L85 PathProgramCache]: Analyzing trace with hash 311166199, now seen corresponding path program 1 times [2023-11-24 22:03:49,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:49,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33474254] [2023-11-24 22:03:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:49,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:50,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:50,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 22:03:50,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:50,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33474254] [2023-11-24 22:03:50,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33474254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:50,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163439957] [2023-11-24 22:03:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:50,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:50,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:50,235 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:50,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-24 22:03:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:50,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-24 22:03:50,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 22:03:50,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:03:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 22:03:50,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163439957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:03:50,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:03:50,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 22 [2023-11-24 22:03:50,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494319061] [2023-11-24 22:03:50,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:03:50,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-24 22:03:50,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:50,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-24 22:03:50,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2023-11-24 22:03:50,800 INFO L87 Difference]: Start difference. First operand 253 states and 332 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:51,747 INFO L93 Difference]: Finished difference Result 636 states and 841 transitions. [2023-11-24 22:03:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-24 22:03:51,748 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2023-11-24 22:03:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:51,752 INFO L225 Difference]: With dead ends: 636 [2023-11-24 22:03:51,752 INFO L226 Difference]: Without dead ends: 466 [2023-11-24 22:03:51,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-11-24 22:03:51,754 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 133 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:51,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1133 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 22:03:51,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-11-24 22:03:51,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 283. [2023-11-24 22:03:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 270 states have (on average 1.3185185185185184) internal successors, (356), 271 states have internal predecessors, (356), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 22:03:51,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 373 transitions. [2023-11-24 22:03:51,883 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 373 transitions. Word has length 47 [2023-11-24 22:03:51,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:51,883 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 373 transitions. [2023-11-24 22:03:51,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:03:51,884 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 373 transitions. [2023-11-24 22:03:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-24 22:03:51,886 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:51,886 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:51,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-24 22:03:52,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-24 22:03:52,093 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:52,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:52,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2139935230, now seen corresponding path program 1 times [2023-11-24 22:03:52,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:52,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350654055] [2023-11-24 22:03:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:52,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:52,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:52,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:52,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-24 22:03:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 22:03:52,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:52,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350654055] [2023-11-24 22:03:52,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350654055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:03:52,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:03:52,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:03:52,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846728144] [2023-11-24 22:03:52,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:03:52,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:03:52,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:03:52,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:03:52,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:03:52,190 INFO L87 Difference]: Start difference. First operand 283 states and 373 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 22:03:52,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:03:52,376 INFO L93 Difference]: Finished difference Result 306 states and 400 transitions. [2023-11-24 22:03:52,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:03:52,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2023-11-24 22:03:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:03:52,379 INFO L225 Difference]: With dead ends: 306 [2023-11-24 22:03:52,379 INFO L226 Difference]: Without dead ends: 284 [2023-11-24 22:03:52,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:03:52,380 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:03:52,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 110 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:03:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-11-24 22:03:52,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 282. [2023-11-24 22:03:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 269 states have (on average 1.312267657992565) internal successors, (353), 270 states have internal predecessors, (353), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 22:03:52,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 370 transitions. [2023-11-24 22:03:52,515 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 370 transitions. Word has length 48 [2023-11-24 22:03:52,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:03:52,516 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 370 transitions. [2023-11-24 22:03:52,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 22:03:52,517 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 370 transitions. [2023-11-24 22:03:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-24 22:03:52,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:03:52,518 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:03:52,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-24 22:03:52,519 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:03:52,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:03:52,520 INFO L85 PathProgramCache]: Analyzing trace with hash 974408095, now seen corresponding path program 4 times [2023-11-24 22:03:52,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:03:52,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498678127] [2023-11-24 22:03:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:03:52,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:03:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:54,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:03:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:54,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-24 22:03:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:03:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 22:03:54,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:03:54,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498678127] [2023-11-24 22:03:54,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498678127] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:03:54,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017560097] [2023-11-24 22:03:54,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 22:03:54,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:03:54,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:03:54,039 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:03:54,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b08365-a4e0-4e56-a4d0-53b26a5c5198/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-24 22:03:54,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 22:03:54,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:03:54,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-24 22:03:54,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:03:54,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1