./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/xor3.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_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/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_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/xor3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/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_bb1d47a6-1b54-4538-9d74-709244ab6b02/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 c89c2ec3a6d8d6162c4c4ac97fed99fb9c343c7a2c2e60d87226da2b47103d07 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:46:51,904 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:46:52,017 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:46:52,023 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:46:52,024 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:46:52,061 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:46:52,062 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:46:52,063 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:46:52,065 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:46:52,070 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:46:52,071 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:46:52,072 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:46:52,073 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:46:52,075 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:46:52,075 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:46:52,076 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:46:52,076 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:46:52,077 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:46:52,077 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:46:52,078 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:46:52,078 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:46:52,079 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:46:52,080 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:46:52,080 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:46:52,081 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:46:52,081 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:46:52,082 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:46:52,082 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:46:52,083 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:46:52,083 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:46:52,085 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:46:52,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:46:52,086 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:46:52,086 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:46:52,086 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:46:52,087 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:46:52,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:46:52,087 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:46:52,088 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:46:52,088 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:46:52,088 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:46:52,089 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:46:52,089 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_bb1d47a6-1b54-4538-9d74-709244ab6b02/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c89c2ec3a6d8d6162c4c4ac97fed99fb9c343c7a2c2e60d87226da2b47103d07 [2023-11-24 21:46:52,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:46:52,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:46:52,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:46:52,403 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:46:52,403 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:46:52,405 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/array-crafted/xor3.i [2023-11-24 21:46:55,530 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:46:55,739 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:46:55,740 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/sv-benchmarks/c/array-crafted/xor3.i [2023-11-24 21:46:55,748 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/data/32faf4d17/567c5a8bc2f6483cb8c5e9d0c049ddd9/FLAGfd8504b94 [2023-11-24 21:46:55,769 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/data/32faf4d17/567c5a8bc2f6483cb8c5e9d0c049ddd9 [2023-11-24 21:46:55,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:46:55,773 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:46:55,775 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:46:55,775 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:46:55,789 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:46:55,790 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:46:55" (1/1) ... [2023-11-24 21:46:55,791 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ae06397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:55, skipping insertion in model container [2023-11-24 21:46:55,791 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:46:55" (1/1) ... [2023-11-24 21:46:55,823 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:46:56,056 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_bb1d47a6-1b54-4538-9d74-709244ab6b02/sv-benchmarks/c/array-crafted/xor3.i[1297,1310] [2023-11-24 21:46:56,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:46:56,081 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:46:56,117 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_bb1d47a6-1b54-4538-9d74-709244ab6b02/sv-benchmarks/c/array-crafted/xor3.i[1297,1310] [2023-11-24 21:46:56,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:46:56,138 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:46:56,138 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:56 WrapperNode [2023-11-24 21:46:56,139 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:46:56,140 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:46:56,141 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:46:56,141 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:46:56,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:56" (1/1) ... [2023-11-24 21:46:56,163 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:56" (1/1) ... [2023-11-24 21:46:56,184 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 76 [2023-11-24 21:46:56,185 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:46:56,186 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:46:56,186 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:46:56,186 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:46:56,198 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:56" (1/1) ... [2023-11-24 21:46:56,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:56" (1/1) ... [2023-11-24 21:46:56,201 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:56" (1/1) ... [2023-11-24 21:46:56,216 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 11, 7]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 0, 7]. The 5 writes are split as follows [0, 5, 0]. [2023-11-24 21:46:56,216 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:56" (1/1) ... [2023-11-24 21:46:56,217 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:56" (1/1) ... [2023-11-24 21:46:56,226 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:56" (1/1) ... [2023-11-24 21:46:56,230 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:56" (1/1) ... [2023-11-24 21:46:56,232 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:56" (1/1) ... [2023-11-24 21:46:56,233 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:56" (1/1) ... [2023-11-24 21:46:56,235 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:46:56,236 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:46:56,237 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:46:56,237 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:46:56,238 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:56" (1/1) ... [2023-11-24 21:46:56,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:46:56,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:46:56,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:46:56,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:46:56,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:46:56,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:46:56,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:46:56,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:46:56,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:46:56,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:46:56,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:46:56,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:46:56,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:46:56,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:46:56,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:46:56,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:46:56,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:46:56,336 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2023-11-24 21:46:56,336 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2023-11-24 21:46:56,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:46:56,430 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:46:56,432 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:46:56,715 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:46:56,775 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:46:56,775 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 21:46:56,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:46:56 BoogieIcfgContainer [2023-11-24 21:46:56,776 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:46:56,778 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:46:56,779 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:46:56,788 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:46:56,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:46:55" (1/3) ... [2023-11-24 21:46:56,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405a5924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:46:56, skipping insertion in model container [2023-11-24 21:46:56,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:56" (2/3) ... [2023-11-24 21:46:56,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405a5924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:46:56, skipping insertion in model container [2023-11-24 21:46:56,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:46:56" (3/3) ... [2023-11-24 21:46:56,796 INFO L112 eAbstractionObserver]: Analyzing ICFG xor3.i [2023-11-24 21:46:56,817 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:46:56,817 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:46:56,869 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:46:56,876 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;@5a405522, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:46:56,876 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:46:56,880 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:46:56,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 21:46:56,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:56,891 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:56,891 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:56,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:56,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1380801659, now seen corresponding path program 1 times [2023-11-24 21:46:56,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:56,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859412183] [2023-11-24 21:46:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:56,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:57,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-24 21:46:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:57,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:46:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:57,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-24 21:46:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 21:46:57,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:57,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859412183] [2023-11-24 21:46:57,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859412183] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:46:57,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43895557] [2023-11-24 21:46:57,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:57,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:46:57,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:46:57,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:46:57,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:46:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:57,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-24 21:46:57,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:46:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 21:46:57,422 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:46:57,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43895557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:57,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:46:57,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2023-11-24 21:46:57,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856998147] [2023-11-24 21:46:57,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:57,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:46:57,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:57,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:46:57,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:46:57,465 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:46:57,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:57,501 INFO L93 Difference]: Finished difference Result 46 states and 69 transitions. [2023-11-24 21:46:57,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:46:57,503 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-11-24 21:46:57,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:57,511 INFO L225 Difference]: With dead ends: 46 [2023-11-24 21:46:57,512 INFO L226 Difference]: Without dead ends: 22 [2023-11-24 21:46:57,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:46:57,519 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:57,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:46:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-24 21:46:57,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-24 21:46:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:46:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2023-11-24 21:46:57,560 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 25 [2023-11-24 21:46:57,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:57,562 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2023-11-24 21:46:57,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:46:57,562 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2023-11-24 21:46:57,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 21:46:57,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:57,564 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:57,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:46:57,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-24 21:46:57,771 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:57,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:57,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1735084607, now seen corresponding path program 1 times [2023-11-24 21:46:57,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:57,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802533464] [2023-11-24 21:46:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:57,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:57,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-24 21:46:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:57,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:46:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:57,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-24 21:46:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 21:46:57,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:57,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802533464] [2023-11-24 21:46:58,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802533464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:46:58,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440131526] [2023-11-24 21:46:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:58,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:46:58,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:46:58,003 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:46:58,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:46:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:58,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:46:58,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:46:58,126 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 21:46:58,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:46:58,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440131526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:58,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:46:58,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 21:46:58,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520707948] [2023-11-24 21:46:58,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:58,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:46:58,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:58,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:46:58,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:46:58,131 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 21:46:58,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:58,154 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2023-11-24 21:46:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:46:58,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-11-24 21:46:58,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:58,155 INFO L225 Difference]: With dead ends: 43 [2023-11-24 21:46:58,156 INFO L226 Difference]: Without dead ends: 23 [2023-11-24 21:46:58,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:46:58,158 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:58,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:46:58,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-24 21:46:58,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-24 21:46:58,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:46:58,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2023-11-24 21:46:58,166 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 25 [2023-11-24 21:46:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:58,166 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2023-11-24 21:46:58,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 21:46:58,167 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2023-11-24 21:46:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-24 21:46:58,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:58,168 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:58,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-24 21:46:58,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:46:58,377 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:58,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:58,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2127840843, now seen corresponding path program 1 times [2023-11-24 21:46:58,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:58,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537636483] [2023-11-24 21:46:58,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:58,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:58,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-24 21:46:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:58,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-24 21:46:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:58,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-24 21:46:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 21:46:58,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:58,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537636483] [2023-11-24 21:46:58,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537636483] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:46:58,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307425990] [2023-11-24 21:46:58,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:58,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:46:58,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:46:58,597 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:46:58,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:46:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:58,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:46:58,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:46:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 21:46:58,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:46:58,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307425990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:58,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:46:58,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-24 21:46:58,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216468004] [2023-11-24 21:46:58,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:58,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:46:58,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:58,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:46:58,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:46:58,693 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:46:58,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:58,717 INFO L93 Difference]: Finished difference Result 46 states and 65 transitions. [2023-11-24 21:46:58,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:46:58,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-11-24 21:46:58,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:58,719 INFO L225 Difference]: With dead ends: 46 [2023-11-24 21:46:58,719 INFO L226 Difference]: Without dead ends: 28 [2023-11-24 21:46:58,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:46:58,721 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:58,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:46:58,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-24 21:46:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-11-24 21:46:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:46:58,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-11-24 21:46:58,728 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 26 [2023-11-24 21:46:58,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:58,728 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-11-24 21:46:58,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:46:58,729 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-11-24 21:46:58,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 21:46:58,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:58,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:58,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:46:58,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:46:58,941 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:58,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:58,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2015595361, now seen corresponding path program 1 times [2023-11-24 21:46:58,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:58,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171724104] [2023-11-24 21:46:58,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:58,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:59,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-24 21:46:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:59,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-24 21:46:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:59,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-24 21:46:59,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-24 21:46:59,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:59,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171724104] [2023-11-24 21:46:59,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171724104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:46:59,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715018746] [2023-11-24 21:46:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:59,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:46:59,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:46:59,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:46:59,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:46:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:59,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:46:59,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:46:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-24 21:46:59,219 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:46:59,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715018746] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:59,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:46:59,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-24 21:46:59,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174080898] [2023-11-24 21:46:59,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:59,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:46:59,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:59,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:46:59,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:46:59,223 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:46:59,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:59,254 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2023-11-24 21:46:59,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:46:59,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-11-24 21:46:59,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:59,258 INFO L225 Difference]: With dead ends: 40 [2023-11-24 21:46:59,259 INFO L226 Difference]: Without dead ends: 25 [2023-11-24 21:46:59,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:46:59,266 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:59,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:46:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-24 21:46:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-24 21:46:59,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:46:59,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-11-24 21:46:59,299 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 35 [2023-11-24 21:46:59,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:59,299 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-11-24 21:46:59,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:46:59,300 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-11-24 21:46:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-24 21:46:59,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:59,301 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:59,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-24 21:46:59,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-24 21:46:59,502 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:59,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:59,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2101539649, now seen corresponding path program 1 times [2023-11-24 21:46:59,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:59,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111568408] [2023-11-24 21:46:59,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:59,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:59,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-24 21:46:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:59,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-24 21:46:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:59,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-24 21:46:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-24 21:46:59,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:59,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111568408] [2023-11-24 21:46:59,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111568408] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:46:59,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635024506] [2023-11-24 21:46:59,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:59,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:46:59,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:46:59,662 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:46:59,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:46:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:59,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:46:59,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:46:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-24 21:46:59,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:46:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-24 21:46:59,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635024506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:46:59,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:46:59,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-11-24 21:46:59,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516883050] [2023-11-24 21:46:59,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:46:59,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:46:59,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:59,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:46:59,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:46:59,858 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-24 21:46:59,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:59,929 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2023-11-24 21:46:59,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:46:59,930 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2023-11-24 21:46:59,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:59,931 INFO L225 Difference]: With dead ends: 59 [2023-11-24 21:46:59,931 INFO L226 Difference]: Without dead ends: 37 [2023-11-24 21:46:59,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:46:59,933 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:59,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 149 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:46:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-24 21:46:59,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2023-11-24 21:46:59,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:46:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-11-24 21:46:59,941 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 36 [2023-11-24 21:46:59,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:59,941 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-11-24 21:46:59,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-24 21:46:59,942 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-11-24 21:46:59,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-24 21:46:59,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:59,944 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:59,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:00,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:00,150 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:00,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:00,151 INFO L85 PathProgramCache]: Analyzing trace with hash -90819289, now seen corresponding path program 2 times [2023-11-24 21:47:00,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:00,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573978489] [2023-11-24 21:47:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:00,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:00,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-24 21:47:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:00,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:47:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:00,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-24 21:47:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-24 21:47:00,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:00,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573978489] [2023-11-24 21:47:00,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573978489] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:00,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418200621] [2023-11-24 21:47:00,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:47:00,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:00,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:00,278 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:00,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:47:00,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:47:00,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:00,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:47:00,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-24 21:47:00,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-24 21:47:00,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418200621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:00,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:00,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-11-24 21:47:00,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821345126] [2023-11-24 21:47:00,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:00,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:47:00,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:00,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:47:00,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:47:00,533 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:47:00,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:00,607 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2023-11-24 21:47:00,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:47:00,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-11-24 21:47:00,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:00,609 INFO L225 Difference]: With dead ends: 67 [2023-11-24 21:47:00,609 INFO L226 Difference]: Without dead ends: 40 [2023-11-24 21:47:00,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:47:00,611 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:00,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:47:00,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-24 21:47:00,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-24 21:47:00,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:47:00,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-11-24 21:47:00,619 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 48 [2023-11-24 21:47:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:00,620 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-11-24 21:47:00,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:47:00,620 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-11-24 21:47:00,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-24 21:47:00,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:00,622 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:00,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:00,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:00,828 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:00,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:00,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1606414655, now seen corresponding path program 3 times [2023-11-24 21:47:00,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:00,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085698744] [2023-11-24 21:47:00,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:00,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:00,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-24 21:47:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:01,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-24 21:47:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:01,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-24 21:47:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-24 21:47:01,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:01,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085698744] [2023-11-24 21:47:01,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085698744] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:01,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391246907] [2023-11-24 21:47:01,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:47:01,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:01,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:01,044 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:01,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:47:01,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 21:47:01,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:01,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:47:01,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-24 21:47:01,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-11-24 21:47:01,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391246907] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:01,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:01,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-24 21:47:01,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380566745] [2023-11-24 21:47:01,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:01,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:47:01,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:01,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:47:01,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:47:01,257 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 21:47:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:01,311 INFO L93 Difference]: Finished difference Result 79 states and 111 transitions. [2023-11-24 21:47:01,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:47:01,312 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2023-11-24 21:47:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:01,313 INFO L225 Difference]: With dead ends: 79 [2023-11-24 21:47:01,313 INFO L226 Difference]: Without dead ends: 53 [2023-11-24 21:47:01,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:47:01,315 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:01,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 111 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:47:01,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-24 21:47:01,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-11-24 21:47:01,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:47:01,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2023-11-24 21:47:01,325 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 55 [2023-11-24 21:47:01,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:01,326 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2023-11-24 21:47:01,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 21:47:01,326 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2023-11-24 21:47:01,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-24 21:47:01,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:01,328 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:01,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:01,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:01,541 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:01,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:01,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2129982999, now seen corresponding path program 4 times [2023-11-24 21:47:01,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:01,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863822770] [2023-11-24 21:47:01,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:01,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:01,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-24 21:47:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:01,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-24 21:47:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:01,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-24 21:47:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-11-24 21:47:01,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:01,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863822770] [2023-11-24 21:47:01,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863822770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:01,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908284051] [2023-11-24 21:47:01,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:47:01,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:01,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:01,922 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:01,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:47:02,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:47:02,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:02,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:47:02,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-11-24 21:47:02,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:02,252 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-11-24 21:47:02,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908284051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:02,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:02,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2023-11-24 21:47:02,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44084061] [2023-11-24 21:47:02,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:02,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-24 21:47:02,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:02,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-24 21:47:02,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:47:02,259 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 21:47:02,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:02,336 INFO L93 Difference]: Finished difference Result 112 states and 161 transitions. [2023-11-24 21:47:02,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 21:47:02,338 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 68 [2023-11-24 21:47:02,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:02,341 INFO L225 Difference]: With dead ends: 112 [2023-11-24 21:47:02,341 INFO L226 Difference]: Without dead ends: 75 [2023-11-24 21:47:02,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:47:02,344 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 74 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:02,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 152 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:47:02,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-24 21:47:02,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-24 21:47:02,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 70 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:47:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 103 transitions. [2023-11-24 21:47:02,378 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 103 transitions. Word has length 68 [2023-11-24 21:47:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:02,378 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 103 transitions. [2023-11-24 21:47:02,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 21:47:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 103 transitions. [2023-11-24 21:47:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-24 21:47:02,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:02,384 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 11, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:02,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:02,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:02,591 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:02,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:02,591 INFO L85 PathProgramCache]: Analyzing trace with hash 943250635, now seen corresponding path program 5 times [2023-11-24 21:47:02,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:02,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390337604] [2023-11-24 21:47:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:02,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:02,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-24 21:47:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:02,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-24 21:47:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:02,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-11-24 21:47:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2023-11-24 21:47:03,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:03,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390337604] [2023-11-24 21:47:03,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390337604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:03,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954302327] [2023-11-24 21:47:03,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:47:03,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:03,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:03,017 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:03,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:47:03,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-11-24 21:47:03,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:03,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:47:03,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2023-11-24 21:47:04,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2023-11-24 21:47:04,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954302327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:04,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:04,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2023-11-24 21:47:04,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181945252] [2023-11-24 21:47:04,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:04,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-24 21:47:04,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-24 21:47:04,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2023-11-24 21:47:04,404 INFO L87 Difference]: Start difference. First operand 75 states and 103 transitions. Second operand has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 21:47:04,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:04,549 INFO L93 Difference]: Finished difference Result 188 states and 287 transitions. [2023-11-24 21:47:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-24 21:47:04,550 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 114 [2023-11-24 21:47:04,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:04,552 INFO L225 Difference]: With dead ends: 188 [2023-11-24 21:47:04,552 INFO L226 Difference]: Without dead ends: 126 [2023-11-24 21:47:04,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2023-11-24 21:47:04,554 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 234 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:04,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 227 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:47:04,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-24 21:47:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-11-24 21:47:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.4710743801652892) internal successors, (178), 121 states have internal predecessors, (178), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:47:04,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 184 transitions. [2023-11-24 21:47:04,567 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 184 transitions. Word has length 114 [2023-11-24 21:47:04,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:04,567 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 184 transitions. [2023-11-24 21:47:04,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 21:47:04,568 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 184 transitions. [2023-11-24 21:47:04,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-24 21:47:04,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:04,572 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 12, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:04,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:04,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:04,781 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:04,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:04,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1178683777, now seen corresponding path program 6 times [2023-11-24 21:47:04,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:04,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311015860] [2023-11-24 21:47:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:04,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:05,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-24 21:47:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:05,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-24 21:47:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:05,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2023-11-24 21:47:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2023-11-24 21:47:05,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:05,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311015860] [2023-11-24 21:47:05,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311015860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:05,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362319608] [2023-11-24 21:47:05,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:47:05,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:05,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:05,444 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:05,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:47:05,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-24 21:47:05,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:05,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-24 21:47:05,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 2036 proven. 21 refuted. 0 times theorem prover too weak. 2509 trivial. 0 not checked. [2023-11-24 21:47:05,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4545 trivial. 0 not checked. [2023-11-24 21:47:06,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362319608] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:06,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:06,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 30 [2023-11-24 21:47:06,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009643925] [2023-11-24 21:47:06,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:06,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-24 21:47:06,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:06,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-24 21:47:06,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2023-11-24 21:47:06,065 INFO L87 Difference]: Start difference. First operand 126 states and 184 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 21:47:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:06,141 INFO L93 Difference]: Finished difference Result 247 states and 371 transitions. [2023-11-24 21:47:06,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-24 21:47:06,142 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 205 [2023-11-24 21:47:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:06,146 INFO L225 Difference]: With dead ends: 247 [2023-11-24 21:47:06,146 INFO L226 Difference]: Without dead ends: 135 [2023-11-24 21:47:06,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2023-11-24 21:47:06,148 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:06,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 105 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:47:06,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-24 21:47:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-11-24 21:47:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.4384615384615385) internal successors, (187), 130 states have internal predecessors, (187), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:47:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 193 transitions. [2023-11-24 21:47:06,178 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 193 transitions. Word has length 205 [2023-11-24 21:47:06,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:06,179 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 193 transitions. [2023-11-24 21:47:06,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 21:47:06,179 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 193 transitions. [2023-11-24 21:47:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-11-24 21:47:06,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:06,183 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 14, 13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:06,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:06,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 21:47:06,389 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:06,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash -456273397, now seen corresponding path program 7 times [2023-11-24 21:47:06,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:06,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400581219] [2023-11-24 21:47:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:06,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:06,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:47:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:07,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-24 21:47:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:07,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2023-11-24 21:47:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-24 21:47:07,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:07,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400581219] [2023-11-24 21:47:07,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400581219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:07,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533025632] [2023-11-24 21:47:07,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 21:47:07,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:07,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:07,103 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:07,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 21:47:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:07,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 21:47:07,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-24 21:47:07,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-24 21:47:07,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533025632] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:07,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:07,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2023-11-24 21:47:07,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964819206] [2023-11-24 21:47:07,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:07,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-24 21:47:07,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:07,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-24 21:47:07,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-11-24 21:47:07,795 INFO L87 Difference]: Start difference. First operand 135 states and 193 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-24 21:47:07,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:07,859 INFO L93 Difference]: Finished difference Result 270 states and 400 transitions. [2023-11-24 21:47:07,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-24 21:47:07,859 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 214 [2023-11-24 21:47:07,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:07,861 INFO L225 Difference]: With dead ends: 270 [2023-11-24 21:47:07,861 INFO L226 Difference]: Without dead ends: 150 [2023-11-24 21:47:07,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-11-24 21:47:07,863 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:07,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:47:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-24 21:47:07,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-11-24 21:47:07,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.393103448275862) internal successors, (202), 145 states have internal predecessors, (202), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:47:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 208 transitions. [2023-11-24 21:47:07,875 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 208 transitions. Word has length 214 [2023-11-24 21:47:07,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:07,875 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 208 transitions. [2023-11-24 21:47:07,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-24 21:47:07,876 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 208 transitions. [2023-11-24 21:47:07,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-11-24 21:47:07,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:07,879 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 28, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:07,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:08,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 21:47:08,086 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:08,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:08,086 INFO L85 PathProgramCache]: Analyzing trace with hash 424224385, now seen corresponding path program 8 times [2023-11-24 21:47:08,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:08,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387903799] [2023-11-24 21:47:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:08,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:09,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-24 21:47:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:09,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-24 21:47:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:09,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-11-24 21:47:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-24 21:47:09,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:09,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387903799] [2023-11-24 21:47:09,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387903799] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:09,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792334112] [2023-11-24 21:47:09,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:47:09,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:09,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:09,633 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:09,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 21:47:09,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:47:09,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:09,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-24 21:47:09,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-24 21:47:10,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-24 21:47:11,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792334112] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:11,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:11,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 61 [2023-11-24 21:47:11,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842218574] [2023-11-24 21:47:11,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:11,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-24 21:47:11,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:11,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-24 21:47:11,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-11-24 21:47:11,609 INFO L87 Difference]: Start difference. First operand 150 states and 208 transitions. Second operand has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-24 21:47:11,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:11,730 INFO L93 Difference]: Finished difference Result 300 states and 445 transitions. [2023-11-24 21:47:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-24 21:47:11,731 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 229 [2023-11-24 21:47:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:11,732 INFO L225 Difference]: With dead ends: 300 [2023-11-24 21:47:11,733 INFO L226 Difference]: Without dead ends: 180 [2023-11-24 21:47:11,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-11-24 21:47:11,736 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:11,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 178 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:47:11,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-24 21:47:11,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2023-11-24 21:47:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.3257142857142856) internal successors, (232), 175 states have internal predecessors, (232), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:47:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 238 transitions. [2023-11-24 21:47:11,751 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 238 transitions. Word has length 229 [2023-11-24 21:47:11,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:11,752 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 238 transitions. [2023-11-24 21:47:11,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-24 21:47:11,753 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 238 transitions. [2023-11-24 21:47:11,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-11-24 21:47:11,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:11,757 INFO L195 NwaCegarLoop]: trace histogram [58, 54, 54, 54, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:11,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-24 21:47:11,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 21:47:11,964 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:11,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:11,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1169439041, now seen corresponding path program 9 times [2023-11-24 21:47:11,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:11,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507892071] [2023-11-24 21:47:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:11,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:15,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-24 21:47:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:15,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2023-11-24 21:47:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:15,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2023-11-24 21:47:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-24 21:47:15,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:15,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507892071] [2023-11-24 21:47:15,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507892071] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:15,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126522237] [2023-11-24 21:47:15,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:47:15,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:15,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:15,860 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:15,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-24 21:47:18,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-24 21:47:18,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:18,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 21:47:18,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 2024 proven. 105 refuted. 0 times theorem prover too weak. 4154 trivial. 0 not checked. [2023-11-24 21:47:19,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6178 trivial. 0 not checked. [2023-11-24 21:47:20,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126522237] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:20,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:20,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 17, 17] total 91 [2023-11-24 21:47:20,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691038913] [2023-11-24 21:47:20,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:20,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-11-24 21:47:20,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:20,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-11-24 21:47:20,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2023-11-24 21:47:20,067 INFO L87 Difference]: Start difference. First operand 180 states and 238 transitions. Second operand has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 21:47:20,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:20,229 INFO L93 Difference]: Finished difference Result 317 states and 449 transitions. [2023-11-24 21:47:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-24 21:47:20,230 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 259 [2023-11-24 21:47:20,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:20,232 INFO L225 Difference]: With dead ends: 317 [2023-11-24 21:47:20,232 INFO L226 Difference]: Without dead ends: 197 [2023-11-24 21:47:20,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2023-11-24 21:47:20,238 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:20,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 176 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:47:20,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-24 21:47:20,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2023-11-24 21:47:20,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.296875) internal successors, (249), 192 states have internal predecessors, (249), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:47:20,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 255 transitions. [2023-11-24 21:47:20,251 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 255 transitions. Word has length 259 [2023-11-24 21:47:20,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:20,251 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 255 transitions. [2023-11-24 21:47:20,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 21:47:20,252 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 255 transitions. [2023-11-24 21:47:20,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-11-24 21:47:20,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:20,256 INFO L195 NwaCegarLoop]: trace histogram [59, 54, 54, 54, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:20,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:20,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 21:47:20,470 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:20,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:20,471 INFO L85 PathProgramCache]: Analyzing trace with hash 833871691, now seen corresponding path program 10 times [2023-11-24 21:47:20,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:20,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714493653] [2023-11-24 21:47:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:20,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:24,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-24 21:47:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:24,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-11-24 21:47:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:24,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2023-11-24 21:47:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2023-11-24 21:47:24,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:24,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714493653] [2023-11-24 21:47:24,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714493653] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:24,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32013487] [2023-11-24 21:47:24,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:47:24,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:24,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:24,437 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:24,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-24 21:47:24,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:47:24,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:24,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 21:47:24,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2023-11-24 21:47:25,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2023-11-24 21:47:26,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32013487] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:26,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:26,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 21, 21] total 100 [2023-11-24 21:47:26,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730980547] [2023-11-24 21:47:26,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:26,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-11-24 21:47:26,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:26,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-11-24 21:47:26,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2023-11-24 21:47:26,922 INFO L87 Difference]: Start difference. First operand 197 states and 255 transitions. Second operand has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 21:47:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:27,285 INFO L93 Difference]: Finished difference Result 434 states and 633 transitions. [2023-11-24 21:47:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-24 21:47:27,286 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 276 [2023-11-24 21:47:27,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:27,289 INFO L225 Difference]: With dead ends: 434 [2023-11-24 21:47:27,289 INFO L226 Difference]: Without dead ends: 298 [2023-11-24 21:47:27,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2023-11-24 21:47:27,295 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 579 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:27,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 431 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:47:27,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-24 21:47:27,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2023-11-24 21:47:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.3993174061433447) internal successors, (410), 293 states have internal predecessors, (410), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:47:27,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 416 transitions. [2023-11-24 21:47:27,311 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 416 transitions. Word has length 276 [2023-11-24 21:47:27,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:27,312 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 416 transitions. [2023-11-24 21:47:27,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 21:47:27,313 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 416 transitions. [2023-11-24 21:47:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-24 21:47:27,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:27,322 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 60, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:27,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:27,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 21:47:27,530 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:27,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:27,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2055562111, now seen corresponding path program 11 times [2023-11-24 21:47:27,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:27,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874113801] [2023-11-24 21:47:27,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:27,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:31,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-24 21:47:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:31,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2023-11-24 21:47:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:31,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2023-11-24 21:47:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 20142 trivial. 0 not checked. [2023-11-24 21:47:31,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:31,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874113801] [2023-11-24 21:47:31,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874113801] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:31,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240484012] [2023-11-24 21:47:31,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:47:31,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:31,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:31,541 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:31,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb1d47a6-1b54-4538-9d74-709244ab6b02/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process