./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/condm.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/condm.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya --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 6f961be2104ef3ac444088284f7936b105cc31dfbd8617bc6896bf1b51a5f23d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:06:05,799 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:06:05,864 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:06:05,869 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:06:05,870 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:06:05,894 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:06:05,895 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:06:05,895 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:06:05,896 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:06:05,896 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:06:05,897 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:06:05,897 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:06:05,898 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:06:05,899 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:06:05,899 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:06:05,900 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:06:05,900 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:06:05,901 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:06:05,901 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:06:05,902 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:06:05,902 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:06:05,904 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:06:05,904 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:06:05,905 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:06:05,905 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:06:05,905 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:06:05,906 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:06:05,906 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:06:05,907 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:06:05,907 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:06:05,908 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:06:05,908 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:06:05,908 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:06:05,908 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:06:05,909 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:06:05,909 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:06:05,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:06:05,909 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:06:05,909 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:06:05,910 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:06:05,910 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:06:05,910 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:06:05,910 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_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f961be2104ef3ac444088284f7936b105cc31dfbd8617bc6896bf1b51a5f23d [2023-11-29 04:06:06,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:06:06,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:06:06,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:06:06,155 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:06:06,155 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:06:06,156 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-fpi/condm.c [2023-11-29 04:06:08,876 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:06:09,032 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:06:09,033 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/sv-benchmarks/c/array-fpi/condm.c [2023-11-29 04:06:09,039 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/data/02978d805/b96739bf65a64599a4db753129e4b22e/FLAGa730de159 [2023-11-29 04:06:09,052 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/data/02978d805/b96739bf65a64599a4db753129e4b22e [2023-11-29 04:06:09,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:06:09,056 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:06:09,057 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:06:09,057 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:06:09,062 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:06:09,062 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:06:09" (1/1) ... [2023-11-29 04:06:09,063 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347c9b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:06:09, skipping insertion in model container [2023-11-29 04:06:09,063 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:06:09" (1/1) ... [2023-11-29 04:06:09,080 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:06:09,196 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_f4e27b7d-a725-42d9-ba92-24e79554fcdc/sv-benchmarks/c/array-fpi/condm.c[588,601] [2023-11-29 04:06:09,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:06:09,222 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:06:09,233 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_f4e27b7d-a725-42d9-ba92-24e79554fcdc/sv-benchmarks/c/array-fpi/condm.c[588,601] [2023-11-29 04:06:09,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:06:09,252 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:06:09,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:06:09 WrapperNode [2023-11-29 04:06:09,252 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:06:09,253 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:06:09,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:06:09,253 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:06:09,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:06:09" (1/1) ... [2023-11-29 04:06:09,265 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:06:09" (1/1) ... [2023-11-29 04:06:09,286 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-11-29 04:06:09,286 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:06:09,287 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:06:09,287 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:06:09,287 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:06:09,297 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:06:09" (1/1) ... [2023-11-29 04:06:09,297 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:06:09" (1/1) ... [2023-11-29 04:06:09,300 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:06:09" (1/1) ... [2023-11-29 04:06:09,314 INFO L175 MemorySlicer]: Split 16 memory accesses to 3 slices as follows [2, 8, 6]. 50 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 3 writes are split as follows [0, 0, 3]. [2023-11-29 04:06:09,314 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:06:09" (1/1) ... [2023-11-29 04:06:09,314 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:06:09" (1/1) ... [2023-11-29 04:06:09,320 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:06:09" (1/1) ... [2023-11-29 04:06:09,323 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:06:09" (1/1) ... [2023-11-29 04:06:09,325 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:06:09" (1/1) ... [2023-11-29 04:06:09,326 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:06:09" (1/1) ... [2023-11-29 04:06:09,328 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:06:09,329 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:06:09,330 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:06:09,330 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:06:09,331 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:06:09" (1/1) ... [2023-11-29 04:06:09,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:06:09,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:06:09,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:06:09,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:06:09,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:06:09,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:06:09,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:06:09,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 04:06:09,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:06:09,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:06:09,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 04:06:09,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 04:06:09,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:06:09,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:06:09,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:06:09,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:06:09,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 04:06:09,459 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:06:09,462 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:06:09,590 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:06:09,619 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:06:09,620 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 04:06:09,620 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:06:09 BoogieIcfgContainer [2023-11-29 04:06:09,620 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:06:09,624 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:06:09,624 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:06:09,626 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:06:09,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:06:09" (1/3) ... [2023-11-29 04:06:09,627 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f29587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:06:09, skipping insertion in model container [2023-11-29 04:06:09,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:06:09" (2/3) ... [2023-11-29 04:06:09,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f29587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:06:09, skipping insertion in model container [2023-11-29 04:06:09,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:06:09" (3/3) ... [2023-11-29 04:06:09,629 INFO L112 eAbstractionObserver]: Analyzing ICFG condm.c [2023-11-29 04:06:09,644 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:06:09,644 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:06:09,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:06:09,690 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;@1d65a32b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:06:09,690 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:06:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 04:06:09,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:06:09,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:06:09,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:06:09,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:06:09,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1236320892, now seen corresponding path program 1 times [2023-11-29 04:06:09,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:06:09,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307012285] [2023-11-29 04:06:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:06:09,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:06:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:06:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:06:09,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:06:09,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307012285] [2023-11-29 04:06:09,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307012285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:06:09,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:06:09,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:06:09,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167389849] [2023-11-29 04:06:09,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:06:09,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 04:06:09,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:06:09,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 04:06:09,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:06:09,890 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:06:09,913 INFO L93 Difference]: Finished difference Result 33 states and 49 transitions. [2023-11-29 04:06:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 04:06:09,916 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-29 04:06:09,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:06:09,921 INFO L225 Difference]: With dead ends: 33 [2023-11-29 04:06:09,921 INFO L226 Difference]: Without dead ends: 15 [2023-11-29 04:06:09,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:06:09,928 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:06:09,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:06:09,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-29 04:06:09,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-29 04:06:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-29 04:06:09,951 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2023-11-29 04:06:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:06:09,952 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-29 04:06:09,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:09,952 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-29 04:06:09,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 04:06:09,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:06:09,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:06:09,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:06:09,953 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:06:09,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:06:09,954 INFO L85 PathProgramCache]: Analyzing trace with hash -556262522, now seen corresponding path program 1 times [2023-11-29 04:06:09,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:06:09,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266307557] [2023-11-29 04:06:09,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:06:09,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:06:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:06:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:06:10,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:06:10,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266307557] [2023-11-29 04:06:10,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266307557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:06:10,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:06:10,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:06:10,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598550547] [2023-11-29 04:06:10,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:06:10,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:06:10,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:06:10,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:06:10,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:06:10,115 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:10,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:06:10,167 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-11-29 04:06:10,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:06:10,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-29 04:06:10,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:06:10,168 INFO L225 Difference]: With dead ends: 34 [2023-11-29 04:06:10,168 INFO L226 Difference]: Without dead ends: 24 [2023-11-29 04:06:10,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:06:10,170 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:06:10,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 11 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:06:10,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-29 04:06:10,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2023-11-29 04:06:10,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:10,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-11-29 04:06:10,176 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2023-11-29 04:06:10,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:06:10,177 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-11-29 04:06:10,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:10,177 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-11-29 04:06:10,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 04:06:10,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:06:10,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:06:10,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:06:10,178 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:06:10,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:06:10,179 INFO L85 PathProgramCache]: Analyzing trace with hash -157564324, now seen corresponding path program 1 times [2023-11-29 04:06:10,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:06:10,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197767296] [2023-11-29 04:06:10,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:06:10,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:06:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:06:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:06:10,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:06:10,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197767296] [2023-11-29 04:06:10,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197767296] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:06:10,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790936555] [2023-11-29 04:06:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:06:10,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:06:10,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:06:10,569 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:06:10,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:06:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:06:10,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 04:06:10,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:06:10,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:06:10,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:06:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:06:10,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:06:11,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 04:06:11,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2023-11-29 04:06:11,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 04:06:11,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 04:06:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:06:11,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790936555] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:06:11,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:06:11,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2023-11-29 04:06:11,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768452319] [2023-11-29 04:06:11,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:06:11,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 04:06:11,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:06:11,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 04:06:11,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:06:11,493 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:12,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:06:12,491 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2023-11-29 04:06:12,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 04:06:12,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-29 04:06:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:06:12,492 INFO L225 Difference]: With dead ends: 64 [2023-11-29 04:06:12,493 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 04:06:12,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=342, Invalid=990, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 04:06:12,495 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 207 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:06:12,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 46 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:06:12,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 04:06:12,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2023-11-29 04:06:12,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:12,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-11-29 04:06:12,507 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2023-11-29 04:06:12,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:06:12,508 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-11-29 04:06:12,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:12,508 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-11-29 04:06:12,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 04:06:12,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:06:12,509 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:06:12,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:06:12,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 04:06:12,713 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:06:12,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:06:12,713 INFO L85 PathProgramCache]: Analyzing trace with hash 12570417, now seen corresponding path program 1 times [2023-11-29 04:06:12,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:06:12,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805146868] [2023-11-29 04:06:12,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:06:12,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:06:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:06:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:06:12,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:06:12,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805146868] [2023-11-29 04:06:12,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805146868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:06:12,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518940186] [2023-11-29 04:06:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:06:12,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:06:12,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:06:12,831 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:06:12,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:06:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:06:12,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:06:12,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:06:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:06:12,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:06:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:06:13,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518940186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:06:13,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:06:13,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-29 04:06:13,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405415465] [2023-11-29 04:06:13,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:06:13,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 04:06:13,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:06:13,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 04:06:13,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:06:13,005 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:13,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:06:13,122 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2023-11-29 04:06:13,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:06:13,125 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-29 04:06:13,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:06:13,125 INFO L225 Difference]: With dead ends: 63 [2023-11-29 04:06:13,126 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 04:06:13,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:06:13,127 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:06:13,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 34 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:06:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 04:06:13,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2023-11-29 04:06:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-11-29 04:06:13,136 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2023-11-29 04:06:13,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:06:13,136 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-11-29 04:06:13,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:13,136 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-11-29 04:06:13,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 04:06:13,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:06:13,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:06:13,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:06:13,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:06:13,343 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:06:13,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:06:13,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2005361542, now seen corresponding path program 1 times [2023-11-29 04:06:13,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:06:13,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368848283] [2023-11-29 04:06:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:06:13,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:06:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:06:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:06:13,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:06:13,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368848283] [2023-11-29 04:06:13,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368848283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:06:13,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636533937] [2023-11-29 04:06:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:06:13,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:06:13,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:06:13,730 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:06:13,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:06:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:06:13,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 04:06:13,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:06:13,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:06:13,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:06:13,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 04:06:14,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:06:14,010 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:06:14,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2023-11-29 04:06:14,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:06:14,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:06:14,148 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-11-29 04:06:14,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2023-11-29 04:06:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:06:14,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:06:15,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 342 treesize of output 318 [2023-11-29 04:06:15,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 295 [2023-11-29 04:06:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:06:15,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636533937] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:06:15,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:06:15,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 26 [2023-11-29 04:06:15,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614606380] [2023-11-29 04:06:15,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:06:15,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:06:15,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:06:15,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:06:15,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:06:15,844 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:19,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:06:19,835 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2023-11-29 04:06:19,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 04:06:19,836 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-29 04:06:19,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:06:19,837 INFO L225 Difference]: With dead ends: 69 [2023-11-29 04:06:19,837 INFO L226 Difference]: Without dead ends: 58 [2023-11-29 04:06:19,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=416, Invalid=1746, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 04:06:19,839 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 184 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:06:19,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 80 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 04:06:19,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-29 04:06:19,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 35. [2023-11-29 04:06:19,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-11-29 04:06:19,856 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 19 [2023-11-29 04:06:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:06:19,856 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-11-29 04:06:19,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-11-29 04:06:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 04:06:19,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:06:19,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:06:19,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:06:20,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:06:20,058 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:06:20,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:06:20,059 INFO L85 PathProgramCache]: Analyzing trace with hash -284437431, now seen corresponding path program 1 times [2023-11-29 04:06:20,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:06:20,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185606193] [2023-11-29 04:06:20,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:06:20,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:06:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:06:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:06:21,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:06:21,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185606193] [2023-11-29 04:06:21,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185606193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:06:21,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331123341] [2023-11-29 04:06:21,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:06:21,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:06:21,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:06:21,273 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:06:21,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:06:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:06:21,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 04:06:21,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:06:21,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:06:21,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 04:06:21,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:06:21,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 04:06:21,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:06:21,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 04:06:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:06:21,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:06:23,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 139 [2023-11-29 04:06:23,660 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:06:23,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 165 [2023-11-29 04:06:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:06:23,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331123341] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:06:23,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:06:23,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2023-11-29 04:06:23,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504269500] [2023-11-29 04:06:23,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:06:23,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 04:06:23,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:06:23,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 04:06:23,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1199, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 04:06:23,726 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:25,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:06:25,969 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2023-11-29 04:06:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 04:06:25,970 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-29 04:06:25,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:06:25,971 INFO L225 Difference]: With dead ends: 76 [2023-11-29 04:06:25,971 INFO L226 Difference]: Without dead ends: 74 [2023-11-29 04:06:25,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=731, Invalid=3429, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 04:06:25,973 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 317 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:06:25,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 138 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 04:06:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-29 04:06:25,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 39. [2023-11-29 04:06:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2023-11-29 04:06:25,989 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 22 [2023-11-29 04:06:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:06:25,989 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2023-11-29 04:06:25,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:25,989 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2023-11-29 04:06:25,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 04:06:25,990 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:06:25,990 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:06:25,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:06:26,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:06:26,191 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:06:26,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:06:26,191 INFO L85 PathProgramCache]: Analyzing trace with hash 300087270, now seen corresponding path program 2 times [2023-11-29 04:06:26,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:06:26,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145852548] [2023-11-29 04:06:26,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:06:26,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:06:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:06:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:06:26,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:06:26,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145852548] [2023-11-29 04:06:26,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145852548] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:06:26,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069715047] [2023-11-29 04:06:26,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:06:26,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:06:26,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:06:26,323 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:06:26,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:06:26,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:06:26,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:06:26,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:06:26,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:06:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:06:26,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:06:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:06:26,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069715047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:06:26,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:06:26,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-29 04:06:26,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816699072] [2023-11-29 04:06:26,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:06:26,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:06:26,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:06:26,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:06:26,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:06:26,527 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:26,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:06:26,680 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2023-11-29 04:06:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:06:26,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-29 04:06:26,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:06:26,681 INFO L225 Difference]: With dead ends: 87 [2023-11-29 04:06:26,681 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 04:06:26,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:06:26,682 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:06:26,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 42 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:06:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 04:06:26,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2023-11-29 04:06:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-11-29 04:06:26,697 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 25 [2023-11-29 04:06:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:06:26,698 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-11-29 04:06:26,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:06:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-11-29 04:06:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 04:06:26,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:06:26,699 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:06:26,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:06:26,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:06:26,899 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:06:26,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:06:26,900 INFO L85 PathProgramCache]: Analyzing trace with hash -435615439, now seen corresponding path program 2 times [2023-11-29 04:06:26,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:06:26,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437130120] [2023-11-29 04:06:26,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:06:26,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:06:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:06:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:06:28,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:06:28,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437130120] [2023-11-29 04:06:28,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437130120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:06:28,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107621450] [2023-11-29 04:06:28,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:06:28,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:06:28,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:06:28,262 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:06:28,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:06:28,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:06:28,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:06:28,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 04:06:28,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:06:28,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:06:28,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 04:06:28,438 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:06:28,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-29 04:06:28,526 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:06:28,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2023-11-29 04:06:28,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:06:28,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2023-11-29 04:06:28,762 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:06:28,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 24 [2023-11-29 04:06:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:06:29,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:06:31,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 99 [2023-11-29 04:06:31,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:06:31,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 185 [2023-11-29 04:06:31,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 95 [2023-11-29 04:06:31,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:06:31,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 84 [2023-11-29 04:06:31,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 102 [2023-11-29 04:06:31,730 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:06:31,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 286 [2023-11-29 04:06:31,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 98 [2023-11-29 04:06:31,776 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:06:31,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 1 [2023-11-29 04:06:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:06:31,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107621450] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:06:31,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:06:31,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 48 [2023-11-29 04:06:31,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69211339] [2023-11-29 04:06:31,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:06:31,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-29 04:06:31,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:06:31,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-29 04:06:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1921, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 04:06:31,842 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 48 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 48 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:07:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:07:09,367 INFO L93 Difference]: Finished difference Result 210 states and 232 transitions. [2023-11-29 04:07:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-11-29 04:07:09,367 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 48 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-29 04:07:09,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:07:09,369 INFO L225 Difference]: With dead ends: 210 [2023-11-29 04:07:09,369 INFO L226 Difference]: Without dead ends: 191 [2023-11-29 04:07:09,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7959 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=2958, Invalid=19692, Unknown=0, NotChecked=0, Total=22650 [2023-11-29 04:07:09,377 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 777 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:07:09,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 153 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 04:07:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-29 04:07:09,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 58. [2023-11-29 04:07:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 57 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:07:09,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2023-11-29 04:07:09,414 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 26 [2023-11-29 04:07:09,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:07:09,414 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2023-11-29 04:07:09,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 48 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:07:09,415 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2023-11-29 04:07:09,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 04:07:09,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:07:09,415 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:07:09,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:07:09,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:07:09,616 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:07:09,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:07:09,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1976744446, now seen corresponding path program 3 times [2023-11-29 04:07:09,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:07:09,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474026530] [2023-11-29 04:07:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:07:09,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:07:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:07:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:07:10,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:07:10,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474026530] [2023-11-29 04:07:10,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474026530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:07:10,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730196340] [2023-11-29 04:07:10,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:07:10,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:07:10,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:07:10,736 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:07:10,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:07:10,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 04:07:10,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:07:10,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 04:07:10,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:07:10,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:07:10,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 04:07:10,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:07:10,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-29 04:07:11,025 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:07:11,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2023-11-29 04:07:11,106 INFO L349 Elim1Store]: treesize reduction 54, result has 38.6 percent of original size [2023-11-29 04:07:11,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 43 [2023-11-29 04:07:11,319 INFO L349 Elim1Store]: treesize reduction 42, result has 58.0 percent of original size [2023-11-29 04:07:11,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 51 treesize of output 86 [2023-11-29 04:07:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:07:11,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:07:13,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 444 treesize of output 420 [2023-11-29 04:07:13,866 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-11-29 04:07:13,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 456595 treesize of output 437567 [2023-11-29 04:07:14,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 178 [2023-11-29 04:07:14,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1777 treesize of output 1693 [2023-11-29 04:07:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:07:14,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730196340] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:07:14,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:07:14,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 54 [2023-11-29 04:07:14,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686112073] [2023-11-29 04:07:14,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:07:14,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-29 04:07:14,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:07:14,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-29 04:07:14,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2323, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 04:07:14,181 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 54 states, 54 states have (on average 1.462962962962963) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:07:51,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:07:51,129 INFO L93 Difference]: Finished difference Result 209 states and 240 transitions. [2023-11-29 04:07:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-11-29 04:07:51,130 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.462962962962963) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-29 04:07:51,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:07:51,132 INFO L225 Difference]: With dead ends: 209 [2023-11-29 04:07:51,132 INFO L226 Difference]: Without dead ends: 207 [2023-11-29 04:07:51,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8487 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=4059, Invalid=18893, Unknown=0, NotChecked=0, Total=22952 [2023-11-29 04:07:51,141 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 524 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:07:51,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 168 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 04:07:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-29 04:07:51,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 111. [2023-11-29 04:07:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.190909090909091) internal successors, (131), 110 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:07:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2023-11-29 04:07:51,226 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 29 [2023-11-29 04:07:51,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:07:51,226 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2023-11-29 04:07:51,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.462962962962963) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:07:51,226 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2023-11-29 04:07:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 04:07:51,227 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:07:51,227 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:07:51,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:07:51,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:07:51,428 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:07:51,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:07:51,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1239179330, now seen corresponding path program 4 times [2023-11-29 04:07:51,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:07:51,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149460891] [2023-11-29 04:07:51,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:07:51,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:07:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:07:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:07:51,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:07:51,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149460891] [2023-11-29 04:07:51,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149460891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:07:51,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379048850] [2023-11-29 04:07:51,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:07:51,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:07:51,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:07:51,605 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:07:51,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:07:51,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:07:51,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:07:51,682 WARN L260 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 04:07:51,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:07:51,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 04:07:51,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-11-29 04:07:51,731 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:07:51,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2023-11-29 04:07:51,921 INFO L349 Elim1Store]: treesize reduction 69, result has 46.9 percent of original size [2023-11-29 04:07:51,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 79 [2023-11-29 04:07:52,181 INFO L349 Elim1Store]: treesize reduction 101, result has 28.9 percent of original size [2023-11-29 04:07:52,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 88 treesize of output 81 [2023-11-29 04:07:52,567 INFO L349 Elim1Store]: treesize reduction 93, result has 39.6 percent of original size [2023-11-29 04:07:52,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 78 treesize of output 104 [2023-11-29 04:07:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:07:53,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:07:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:07:55,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379048850] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:07:55,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:07:55,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20, 19] total 47 [2023-11-29 04:07:55,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356118734] [2023-11-29 04:07:55,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:07:55,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 04:07:55,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:07:55,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 04:07:55,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1870, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 04:07:55,959 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:13,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:08:13,552 INFO L93 Difference]: Finished difference Result 256 states and 284 transitions. [2023-11-29 04:08:13,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-29 04:08:13,553 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-29 04:08:13,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:08:13,554 INFO L225 Difference]: With dead ends: 256 [2023-11-29 04:08:13,554 INFO L226 Difference]: Without dead ends: 230 [2023-11-29 04:08:13,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5712 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=2163, Invalid=16469, Unknown=0, NotChecked=0, Total=18632 [2023-11-29 04:08:13,556 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 348 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 1926 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-29 04:08:13,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 446 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1926 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-29 04:08:13,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-11-29 04:08:13,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 109. [2023-11-29 04:08:13,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1666666666666667) internal successors, (126), 108 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:13,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2023-11-29 04:08:13,651 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 31 [2023-11-29 04:08:13,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:08:13,651 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2023-11-29 04:08:13,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:13,651 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2023-11-29 04:08:13,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 04:08:13,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:08:13,652 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:08:13,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:08:13,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:08:13,853 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:08:13,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:08:13,854 INFO L85 PathProgramCache]: Analyzing trace with hash -294303835, now seen corresponding path program 3 times [2023-11-29 04:08:13,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:08:13,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471811642] [2023-11-29 04:08:13,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:08:13,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:08:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:08:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:08:14,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:08:14,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471811642] [2023-11-29 04:08:14,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471811642] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:08:14,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099439670] [2023-11-29 04:08:14,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:08:14,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:08:14,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:08:14,009 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:08:14,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:08:14,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 04:08:14,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:08:14,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:08:14,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:08:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:08:14,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:08:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:08:14,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099439670] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:08:14,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:08:14,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 04:08:14,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872309019] [2023-11-29 04:08:14,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:08:14,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:08:14,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:08:14,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:08:14,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:08:14,305 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:14,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:08:14,723 INFO L93 Difference]: Finished difference Result 164 states and 182 transitions. [2023-11-29 04:08:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:08:14,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-29 04:08:14,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:08:14,725 INFO L225 Difference]: With dead ends: 164 [2023-11-29 04:08:14,725 INFO L226 Difference]: Without dead ends: 150 [2023-11-29 04:08:14,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2023-11-29 04:08:14,726 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:08:14,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 52 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:08:14,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-29 04:08:14,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 106. [2023-11-29 04:08:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 105 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2023-11-29 04:08:14,825 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 33 [2023-11-29 04:08:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:08:14,825 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2023-11-29 04:08:14,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2023-11-29 04:08:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 04:08:14,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:08:14,826 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:08:14,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 04:08:15,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 04:08:15,027 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:08:15,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:08:15,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1414642665, now seen corresponding path program 4 times [2023-11-29 04:08:15,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:08:15,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622456534] [2023-11-29 04:08:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:08:15,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:08:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:08:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:08:16,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:08:16,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622456534] [2023-11-29 04:08:16,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622456534] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:08:16,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596392866] [2023-11-29 04:08:16,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:08:16,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:08:16,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:08:16,687 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:08:16,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:08:16,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:08:16,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:08:16,755 WARN L260 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-29 04:08:16,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:08:16,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 04:08:16,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-11-29 04:08:16,816 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:08:16,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2023-11-29 04:08:16,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:08:16,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 57 [2023-11-29 04:08:17,155 INFO L349 Elim1Store]: treesize reduction 100, result has 42.2 percent of original size [2023-11-29 04:08:17,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 66 treesize of output 94 [2023-11-29 04:08:17,459 INFO L349 Elim1Store]: treesize reduction 132, result has 30.2 percent of original size [2023-11-29 04:08:17,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 100 treesize of output 100 [2023-11-29 04:08:17,810 INFO L349 Elim1Store]: treesize reduction 132, result has 30.2 percent of original size [2023-11-29 04:08:17,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 108 treesize of output 108 [2023-11-29 04:08:18,254 INFO L349 Elim1Store]: treesize reduction 132, result has 35.6 percent of original size [2023-11-29 04:08:18,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 97 treesize of output 126 [2023-11-29 04:08:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:08:19,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:08:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:08:23,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596392866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:08:23,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:08:23,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 23] total 66 [2023-11-29 04:08:23,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732868109] [2023-11-29 04:08:23,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:08:23,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-29 04:08:23,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:08:23,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-29 04:08:23,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=3739, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 04:08:23,699 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand has 66 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 66 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:14,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:09:14,829 INFO L93 Difference]: Finished difference Result 213 states and 236 transitions. [2023-11-29 04:09:14,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-11-29 04:09:14,830 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 66 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-29 04:09:14,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:09:14,831 INFO L225 Difference]: With dead ends: 213 [2023-11-29 04:09:14,831 INFO L226 Difference]: Without dead ends: 211 [2023-11-29 04:09:14,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6987 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=3443, Invalid=20735, Unknown=2, NotChecked=0, Total=24180 [2023-11-29 04:09:14,833 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 383 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 1957 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 2251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 1957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:09:14,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 325 Invalid, 2251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 1957 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-29 04:09:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-29 04:09:14,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 116. [2023-11-29 04:09:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 115 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2023-11-29 04:09:14,979 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 36 [2023-11-29 04:09:14,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:09:14,980 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2023-11-29 04:09:14,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 66 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2023-11-29 04:09:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 04:09:14,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:09:14,981 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:14,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 04:09:15,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:15,181 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:09:15,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:15,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1530831313, now seen corresponding path program 5 times [2023-11-29 04:09:15,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:15,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387843314] [2023-11-29 04:09:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:15,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 04:09:15,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:15,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387843314] [2023-11-29 04:09:15,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387843314] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:15,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463749181] [2023-11-29 04:09:15,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:09:15,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:15,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:09:15,361 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:09:15,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:09:15,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 04:09:15,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:09:15,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 04:09:15,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:09:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:09:15,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:09:15,757 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:09:15,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463749181] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:09:15,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:09:15,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 21 [2023-11-29 04:09:15,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009489240] [2023-11-29 04:09:15,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:09:15,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 04:09:15,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:15,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 04:09:15,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2023-11-29 04:09:15,759 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:16,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:09:16,355 INFO L93 Difference]: Finished difference Result 233 states and 257 transitions. [2023-11-29 04:09:16,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:09:16,356 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-29 04:09:16,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:09:16,357 INFO L225 Difference]: With dead ends: 233 [2023-11-29 04:09:16,357 INFO L226 Difference]: Without dead ends: 138 [2023-11-29 04:09:16,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2023-11-29 04:09:16,358 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 158 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:09:16,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 76 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:09:16,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-29 04:09:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 98. [2023-11-29 04:09:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.134020618556701) internal successors, (110), 97 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2023-11-29 04:09:16,490 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 38 [2023-11-29 04:09:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:09:16,490 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2023-11-29 04:09:16,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:16,491 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2023-11-29 04:09:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 04:09:16,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:09:16,491 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:16,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 04:09:16,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:16,692 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:09:16,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:16,692 INFO L85 PathProgramCache]: Analyzing trace with hash -847410628, now seen corresponding path program 5 times [2023-11-29 04:09:16,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:16,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199915370] [2023-11-29 04:09:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:16,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:09:16,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:16,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199915370] [2023-11-29 04:09:16,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199915370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:16,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276938882] [2023-11-29 04:09:16,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:09:16,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:16,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:09:16,938 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:09:16,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:09:17,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 04:09:17,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:09:17,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:09:17,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:09:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:09:17,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:09:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:09:17,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276938882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:09:17,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:09:17,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 26 [2023-11-29 04:09:17,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871732045] [2023-11-29 04:09:17,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:09:17,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:09:17,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:17,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:09:17,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:09:17,401 INFO L87 Difference]: Start difference. First operand 98 states and 110 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:09:18,814 INFO L93 Difference]: Finished difference Result 261 states and 283 transitions. [2023-11-29 04:09:18,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 04:09:18,815 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-29 04:09:18,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:09:18,816 INFO L225 Difference]: With dead ends: 261 [2023-11-29 04:09:18,816 INFO L226 Difference]: Without dead ends: 234 [2023-11-29 04:09:18,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 57 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 04:09:18,817 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 247 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:09:18,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 252 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 04:09:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-29 04:09:18,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 130. [2023-11-29 04:09:18,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.1085271317829457) internal successors, (143), 129 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2023-11-29 04:09:18,996 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 39 [2023-11-29 04:09:18,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:09:18,997 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2023-11-29 04:09:18,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:18,997 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2023-11-29 04:09:18,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 04:09:18,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:09:18,997 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:19,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 04:09:19,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 04:09:19,198 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:09:19,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:19,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1580479505, now seen corresponding path program 6 times [2023-11-29 04:09:19,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:19,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765814404] [2023-11-29 04:09:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:19,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:21,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:21,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765814404] [2023-11-29 04:09:21,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765814404] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:21,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189442521] [2023-11-29 04:09:21,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:09:21,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:21,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:09:21,362 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:09:21,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:09:21,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-29 04:09:21,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:09:21,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 86 conjunts are in the unsatisfiable core [2023-11-29 04:09:21,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:09:21,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:09:21,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 04:09:21,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:09:21,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-29 04:09:21,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:09:21,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-29 04:09:21,827 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:09:21,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 04:09:22,095 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:09:22,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 51 [2023-11-29 04:09:22,272 INFO L349 Elim1Store]: treesize reduction 90, result has 38.4 percent of original size [2023-11-29 04:09:22,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 71 [2023-11-29 04:09:22,623 INFO L349 Elim1Store]: treesize reduction 70, result has 57.8 percent of original size [2023-11-29 04:09:22,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 77 treesize of output 142 [2023-11-29 04:09:23,316 INFO L349 Elim1Store]: treesize reduction 70, result has 57.8 percent of original size [2023-11-29 04:09:23,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 162 treesize of output 207 [2023-11-29 04:09:24,400 INFO L349 Elim1Store]: treesize reduction 90, result has 38.4 percent of original size [2023-11-29 04:09:24,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 179 treesize of output 167 [2023-11-29 04:09:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:25,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:09:32,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 194 [2023-11-29 04:09:32,747 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:09:32,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51774 treesize of output 51198 [2023-11-29 04:09:32,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 148 [2023-11-29 04:09:32,912 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:09:32,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14445 treesize of output 1 [2023-11-29 04:09:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:33,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189442521] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:09:33,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:09:33,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29, 28] total 75 [2023-11-29 04:09:33,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189883034] [2023-11-29 04:09:33,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:09:33,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-11-29 04:09:33,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:33,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-11-29 04:09:33,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=4551, Unknown=0, NotChecked=0, Total=5550 [2023-11-29 04:09:33,020 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 75 states, 75 states have (on average 1.5333333333333334) internal successors, (115), 75 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:20,293 INFO L93 Difference]: Finished difference Result 370 states and 408 transitions. [2023-11-29 04:11:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-11-29 04:11:20,294 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.5333333333333334) internal successors, (115), 75 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-29 04:11:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:20,295 INFO L225 Difference]: With dead ends: 370 [2023-11-29 04:11:20,295 INFO L226 Difference]: Without dead ends: 339 [2023-11-29 04:11:20,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15483 ImplicationChecksByTransitivity, 102.9s TimeCoverageRelationStatistics Valid=8083, Invalid=35807, Unknown=0, NotChecked=0, Total=43890 [2023-11-29 04:11:20,299 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 782 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:20,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 213 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 1507 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2023-11-29 04:11:20,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-11-29 04:11:20,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 178. [2023-11-29 04:11:20,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.112994350282486) internal successors, (197), 177 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:20,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 197 transitions. [2023-11-29 04:11:20,626 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 197 transitions. Word has length 40 [2023-11-29 04:11:20,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:20,626 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 197 transitions. [2023-11-29 04:11:20,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.5333333333333334) internal successors, (115), 75 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 197 transitions. [2023-11-29 04:11:20,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 04:11:20,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:20,627 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:20,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 04:11:20,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:20,828 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:20,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1656413410, now seen corresponding path program 7 times [2023-11-29 04:11:20,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:20,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281792521] [2023-11-29 04:11:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:20,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:24,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:24,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281792521] [2023-11-29 04:11:24,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281792521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:24,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916531715] [2023-11-29 04:11:24,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:11:24,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:24,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:24,312 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:24,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 04:11:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:24,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-29 04:11:24,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:24,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:11:24,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 04:11:24,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:11:24,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-29 04:11:24,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:11:24,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-29 04:11:24,670 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:11:24,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 04:11:24,874 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:11:24,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 51 [2023-11-29 04:11:25,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:11:25,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 44 [2023-11-29 04:11:25,290 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:11:25,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 34 [2023-11-29 04:11:25,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:11:25,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 24 [2023-11-29 04:11:25,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:11:25,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 04:11:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:26,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:34,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 143 [2023-11-29 04:11:34,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:11:34,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 128 [2023-11-29 04:11:34,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 147 [2023-11-29 04:11:34,748 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:11:34,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 583 treesize of output 1 [2023-11-29 04:11:34,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 146 [2023-11-29 04:11:34,761 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:11:34,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 718 treesize of output 710 [2023-11-29 04:11:34,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 150 [2023-11-29 04:11:34,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:11:34,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1130 treesize of output 1 [2023-11-29 04:11:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:34,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916531715] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:34,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:34,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 72 [2023-11-29 04:11:34,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132967219] [2023-11-29 04:11:34,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:34,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-11-29 04:11:34,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-11-29 04:11:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=4653, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 04:11:34,981 INFO L87 Difference]: Start difference. First operand 178 states and 197 transitions. Second operand has 72 states, 72 states have (on average 1.6805555555555556) internal successors, (121), 72 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:54,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 04:17:02,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:17:02,236 INFO L93 Difference]: Finished difference Result 394 states and 427 transitions. [2023-11-29 04:17:02,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2023-11-29 04:17:02,236 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.6805555555555556) internal successors, (121), 72 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-29 04:17:02,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:17:02,238 INFO L225 Difference]: With dead ends: 394 [2023-11-29 04:17:02,238 INFO L226 Difference]: Without dead ends: 392 [2023-11-29 04:17:02,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16822 ImplicationChecksByTransitivity, 310.5s TimeCoverageRelationStatistics Valid=4861, Invalid=44644, Unknown=1, NotChecked=0, Total=49506 [2023-11-29 04:17:02,241 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1164 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 568 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:17:02,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 558 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 1792 Invalid, 1 Unknown, 0 Unchecked, 23.3s Time] [2023-11-29 04:17:02,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-11-29 04:17:02,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 202. [2023-11-29 04:17:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.1393034825870647) internal successors, (229), 201 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:02,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 229 transitions. [2023-11-29 04:17:02,656 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 229 transitions. Word has length 43 [2023-11-29 04:17:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:17:02,656 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 229 transitions. [2023-11-29 04:17:02,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.6805555555555556) internal successors, (121), 72 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 229 transitions. [2023-11-29 04:17:02,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 04:17:02,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:17:02,657 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:17:02,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 04:17:02,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:17:02,858 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:17:02,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:17:02,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1289039934, now seen corresponding path program 8 times [2023-11-29 04:17:02,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:17:02,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615718166] [2023-11-29 04:17:02,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:17:02,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:17:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:17:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 54 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:17:03,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:17:03,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615718166] [2023-11-29 04:17:03,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615718166] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:17:03,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709701668] [2023-11-29 04:17:03,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:17:03,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:17:03,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:17:03,121 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:17:03,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 04:17:03,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:17:03,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:17:03,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:17:03,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:17:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 67 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:17:03,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:17:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 67 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:17:03,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709701668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:17:03,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:17:03,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2023-11-29 04:17:03,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229557001] [2023-11-29 04:17:03,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:17:03,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 04:17:03,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:17:03,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 04:17:03,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2023-11-29 04:17:03,547 INFO L87 Difference]: Start difference. First operand 202 states and 229 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:04,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:17:04,427 INFO L93 Difference]: Finished difference Result 301 states and 337 transitions. [2023-11-29 04:17:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 04:17:04,427 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-29 04:17:04,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:17:04,428 INFO L225 Difference]: With dead ends: 301 [2023-11-29 04:17:04,428 INFO L226 Difference]: Without dead ends: 180 [2023-11-29 04:17:04,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2023-11-29 04:17:04,429 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 153 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:17:04,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 90 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:17:04,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-29 04:17:04,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 150. [2023-11-29 04:17:04,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.1342281879194631) internal successors, (169), 149 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 169 transitions. [2023-11-29 04:17:04,777 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 169 transitions. Word has length 43 [2023-11-29 04:17:04,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:17:04,777 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 169 transitions. [2023-11-29 04:17:04,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:04,777 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 169 transitions. [2023-11-29 04:17:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 04:17:04,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:17:04,778 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:17:04,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 04:17:04,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 04:17:04,978 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:17:04,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:17:04,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1036816108, now seen corresponding path program 9 times [2023-11-29 04:17:04,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:17:04,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800316048] [2023-11-29 04:17:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:17:04,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:17:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:17:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 37 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:17:05,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:17:05,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800316048] [2023-11-29 04:17:05,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800316048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:17:05,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492611959] [2023-11-29 04:17:05,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:17:05,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:17:05,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:17:05,264 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:17:05,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 04:17:05,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 04:17:05,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:17:05,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 04:17:05,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:17:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-29 04:17:05,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:17:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-29 04:17:05,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492611959] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:17:05,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:17:05,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 34 [2023-11-29 04:17:05,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235336272] [2023-11-29 04:17:05,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:17:05,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 04:17:05,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:17:05,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 04:17:05,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 04:17:05,951 INFO L87 Difference]: Start difference. First operand 150 states and 169 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:17:08,335 INFO L93 Difference]: Finished difference Result 354 states and 393 transitions. [2023-11-29 04:17:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 04:17:08,336 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-29 04:17:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:17:08,337 INFO L225 Difference]: With dead ends: 354 [2023-11-29 04:17:08,337 INFO L226 Difference]: Without dead ends: 266 [2023-11-29 04:17:08,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=936, Invalid=3486, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 04:17:08,338 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 845 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:17:08,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 368 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 04:17:08,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-11-29 04:17:08,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 168. [2023-11-29 04:17:08,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1437125748502994) internal successors, (191), 167 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 191 transitions. [2023-11-29 04:17:08,738 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 191 transitions. Word has length 44 [2023-11-29 04:17:08,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:17:08,738 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 191 transitions. [2023-11-29 04:17:08,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:08,739 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 191 transitions. [2023-11-29 04:17:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 04:17:08,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:17:08,739 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:17:08,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 04:17:08,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 04:17:08,940 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:17:08,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:17:08,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1807812094, now seen corresponding path program 10 times [2023-11-29 04:17:08,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:17:08,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705377257] [2023-11-29 04:17:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:17:08,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:17:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:17:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:17:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:17:12,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705377257] [2023-11-29 04:17:12,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705377257] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:17:12,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24802380] [2023-11-29 04:17:12,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:17:12,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:17:12,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:17:12,415 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:17:12,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e27b7d-a725-42d9-ba92-24e79554fcdc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 04:17:12,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:17:12,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:17:12,519 WARN L260 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 86 conjunts are in the unsatisfiable core [2023-11-29 04:17:12,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:17:12,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 04:17:12,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-11-29 04:17:12,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:17:12,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2023-11-29 04:17:12,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:17:12,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 58 [2023-11-29 04:17:12,755 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:17:12,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 73 [2023-11-29 04:17:12,831 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:17:12,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 88 [2023-11-29 04:17:12,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:17:12,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 102 [2023-11-29 04:17:13,638 INFO L349 Elim1Store]: treesize reduction 133, result has 56.0 percent of original size [2023-11-29 04:17:13,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 102 treesize of output 199 [2023-11-29 04:17:14,612 INFO L349 Elim1Store]: treesize reduction 233, result has 29.4 percent of original size [2023-11-29 04:17:14,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 216 treesize of output 209 [2023-11-29 04:17:15,616 INFO L349 Elim1Store]: treesize reduction 225, result has 37.2 percent of original size [2023-11-29 04:17:15,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 43 case distinctions, treesize of input 182 treesize of output 232 [2023-11-29 04:17:16,770 INFO L349 Elim1Store]: treesize reduction 289, result has 25.1 percent of original size [2023-11-29 04:17:16,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 43 case distinctions, treesize of input 256 treesize of output 246 [2023-11-29 04:17:18,163 INFO L349 Elim1Store]: treesize reduction 285, result has 26.2 percent of original size [2023-11-29 04:17:18,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 43 case distinctions, treesize of input 265 treesize of output 259 [2023-11-29 04:17:19,701 INFO L349 Elim1Store]: treesize reduction 289, result has 25.1 percent of original size [2023-11-29 04:17:19,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 43 case distinctions, treesize of input 277 treesize of output 267 [2023-11-29 04:17:21,355 INFO L349 Elim1Store]: treesize reduction 285, result has 26.2 percent of original size [2023-11-29 04:17:21,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 43 case distinctions, treesize of input 189 treesize of output 207 [2023-11-29 04:17:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 22 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:17:22,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:17:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:17:39,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24802380] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:17:39,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:17:39,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 31] total 91 [2023-11-29 04:17:39,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003029936] [2023-11-29 04:17:39,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:17:39,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-11-29 04:17:39,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:17:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-11-29 04:17:39,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=7035, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 04:17:39,740 INFO L87 Difference]: Start difference. First operand 168 states and 191 transitions. Second operand has 91 states, 91 states have (on average 1.3846153846153846) internal successors, (126), 91 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:18:10,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 04:18:44,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 04:20:39,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]