./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep.i --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_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/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_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/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_54368a54-645e-4b0a-92c1-3cdd8ca379f5/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 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:28:30,997 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:28:31,065 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:28:31,069 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:28:31,070 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:28:31,093 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:28:31,093 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:28:31,094 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:28:31,094 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:28:31,095 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:28:31,096 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:28:31,096 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:28:31,097 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:28:31,098 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:28:31,098 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:28:31,099 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:28:31,099 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:28:31,100 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:28:31,100 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:28:31,101 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:28:31,101 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:28:31,103 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:28:31,104 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:28:31,104 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:28:31,104 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:28:31,105 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:28:31,105 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:28:31,106 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:28:31,106 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:28:31,107 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:28:31,107 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:28:31,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:28:31,108 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:28:31,108 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:28:31,108 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:28:31,108 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:28:31,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:28:31,109 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:28:31,109 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:28:31,109 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:28:31,109 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:28:31,110 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:28:31,110 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_54368a54-645e-4b0a-92c1-3cdd8ca379f5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac [2023-11-29 04:28:31,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:28:31,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:28:31,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:28:31,353 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:28:31,353 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:28:31,354 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/reducercommutativity/sep.i [2023-11-29 04:28:34,109 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:28:34,303 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:28:34,304 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/sv-benchmarks/c/reducercommutativity/sep.i [2023-11-29 04:28:34,309 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/data/3c0077c8a/6bccc9abfc724a4c8697659cd585942b/FLAG395f526c0 [2023-11-29 04:28:34,323 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/data/3c0077c8a/6bccc9abfc724a4c8697659cd585942b [2023-11-29 04:28:34,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:28:34,327 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:28:34,328 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:28:34,328 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:28:34,333 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:28:34,334 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:28:34" (1/1) ... [2023-11-29 04:28:34,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ebeb9df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:28:34, skipping insertion in model container [2023-11-29 04:28:34,335 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:28:34" (1/1) ... [2023-11-29 04:28:34,355 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:28:34,497 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_54368a54-645e-4b0a-92c1-3cdd8ca379f5/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2023-11-29 04:28:34,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:28:34,509 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:28:34,527 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_54368a54-645e-4b0a-92c1-3cdd8ca379f5/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2023-11-29 04:28:34,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:28:34,541 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:28:34,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:28:34 WrapperNode [2023-11-29 04:28:34,542 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:28:34,543 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:28:34,543 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:28:34,543 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:28:34,548 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:28:34" (1/1) ... [2023-11-29 04:28:34,555 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:28:34" (1/1) ... [2023-11-29 04:28:34,575 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-11-29 04:28:34,575 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:28:34,576 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:28:34,576 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:28:34,576 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:28:34,585 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:28:34" (1/1) ... [2023-11-29 04:28:34,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:28:34" (1/1) ... [2023-11-29 04:28:34,587 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:28:34" (1/1) ... [2023-11-29 04:28:34,600 INFO L175 MemorySlicer]: Split 17 memory accesses to 3 slices as follows [2, 6, 9]. 53 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 4 writes are split as follows [0, 0, 4]. [2023-11-29 04:28:34,600 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:28:34" (1/1) ... [2023-11-29 04:28:34,600 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:28:34" (1/1) ... [2023-11-29 04:28:34,607 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:28:34" (1/1) ... [2023-11-29 04:28:34,610 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:28:34" (1/1) ... [2023-11-29 04:28:34,611 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:28:34" (1/1) ... [2023-11-29 04:28:34,613 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:28:34" (1/1) ... [2023-11-29 04:28:34,615 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:28:34,616 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:28:34,616 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:28:34,616 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:28:34,617 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:28:34" (1/1) ... [2023-11-29 04:28:34,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:28:34,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:34,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:28:34,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:28:34,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:28:34,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:28:34,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:28:34,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 04:28:34,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:28:34,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:28:34,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:28:34,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 04:28:34,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:28:34,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:28:34,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:28:34,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:28:34,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 04:28:34,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:28:34,682 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-11-29 04:28:34,683 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-11-29 04:28:34,770 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:28:34,771 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:28:34,903 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:28:34,926 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:28:34,926 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 04:28:34,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:28:34 BoogieIcfgContainer [2023-11-29 04:28:34,926 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:28:34,929 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:28:34,930 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:28:34,933 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:28:34,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:28:34" (1/3) ... [2023-11-29 04:28:34,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ff82c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:28:34, skipping insertion in model container [2023-11-29 04:28:34,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:28:34" (2/3) ... [2023-11-29 04:28:34,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ff82c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:28:34, skipping insertion in model container [2023-11-29 04:28:34,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:28:34" (3/3) ... [2023-11-29 04:28:34,936 INFO L112 eAbstractionObserver]: Analyzing ICFG sep.i [2023-11-29 04:28:34,956 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:28:34,956 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:28:34,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:28:35,004 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;@79584e1b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:28:35,004 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:28:35,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 04:28:35,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 04:28:35,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:28:35,017 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:28:35,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:28:35,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:35,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1654425845, now seen corresponding path program 1 times [2023-11-29 04:28:35,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:35,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553818458] [2023-11-29 04:28:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:35,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:35,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:28:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:35,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 04:28:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:35,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:28:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:28:35,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:35,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553818458] [2023-11-29 04:28:35,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553818458] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:28:35,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057733828] [2023-11-29 04:28:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:35,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:35,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:35,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:35,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:28:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:35,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 04:28:35,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 04:28:35,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:28:35,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057733828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:28:35,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:28:35,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2023-11-29 04:28:35,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247985373] [2023-11-29 04:28:35,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:28:35,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 04:28:35,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:35,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 04:28:35,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:28:35,585 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 04:28:35,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:28:35,610 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2023-11-29 04:28:35,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 04:28:35,613 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-11-29 04:28:35,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:28:35,619 INFO L225 Difference]: With dead ends: 41 [2023-11-29 04:28:35,619 INFO L226 Difference]: Without dead ends: 19 [2023-11-29 04:28:35,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:28:35,625 INFO L413 NwaCegarLoop]: 23 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, 23 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 04:28:35,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:28:35,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-29 04:28:35,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-29 04:28:35,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 04:28:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-11-29 04:28:35,658 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 24 [2023-11-29 04:28:35,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:28:35,660 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-11-29 04:28:35,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 04:28:35,661 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-11-29 04:28:35,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 04:28:35,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:28:35,662 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:28:35,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:28:35,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:35,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:28:35,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:35,869 INFO L85 PathProgramCache]: Analyzing trace with hash -475344815, now seen corresponding path program 1 times [2023-11-29 04:28:35,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:35,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489190281] [2023-11-29 04:28:35,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:35,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:35,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:28:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:35,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 04:28:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:36,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:28:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:28:36,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:36,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489190281] [2023-11-29 04:28:36,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489190281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:28:36,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950501835] [2023-11-29 04:28:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:36,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:36,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:36,015 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:36,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:28:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:36,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 04:28:36,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:28:36,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:28:36,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950501835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:28:36,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:28:36,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-11-29 04:28:36,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948427567] [2023-11-29 04:28:36,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:28:36,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:28:36,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:36,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:28:36,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:28:36,160 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 04:28:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:28:36,202 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2023-11-29 04:28:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:28:36,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-11-29 04:28:36,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:28:36,204 INFO L225 Difference]: With dead ends: 38 [2023-11-29 04:28:36,204 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 04:28:36,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:28:36,206 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:28:36,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 22 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:28:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 04:28:36,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-11-29 04:28:36,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 04:28:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-29 04:28:36,213 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2023-11-29 04:28:36,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:28:36,214 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-29 04:28:36,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 04:28:36,214 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-29 04:28:36,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 04:28:36,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:28:36,216 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:28:36,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:28:36,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:36,416 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:28:36,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:36,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2026227477, now seen corresponding path program 1 times [2023-11-29 04:28:36,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:36,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581461010] [2023-11-29 04:28:36,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:36,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:36,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:28:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:36,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 04:28:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:36,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-29 04:28:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 04:28:36,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:36,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581461010] [2023-11-29 04:28:36,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581461010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:28:36,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:28:36,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:28:36,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076907070] [2023-11-29 04:28:36,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:28:36,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:28:36,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:36,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:28:36,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:28:36,563 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 04:28:36,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:28:36,597 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-11-29 04:28:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:28:36,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2023-11-29 04:28:36,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:28:36,599 INFO L225 Difference]: With dead ends: 34 [2023-11-29 04:28:36,599 INFO L226 Difference]: Without dead ends: 21 [2023-11-29 04:28:36,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:28:36,601 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:28:36,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 24 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:28:36,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-29 04:28:36,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-29 04:28:36,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 04:28:36,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-29 04:28:36,607 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 33 [2023-11-29 04:28:36,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:28:36,607 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-29 04:28:36,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 04:28:36,607 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-29 04:28:36,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 04:28:36,609 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:28:36,609 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:28:36,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 04:28:36,609 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:28:36,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:36,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1147416046, now seen corresponding path program 1 times [2023-11-29 04:28:36,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:36,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881996793] [2023-11-29 04:28:36,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:36,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:36,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:28:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:36,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 04:28:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:36,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 04:28:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 04:28:36,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:36,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881996793] [2023-11-29 04:28:36,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881996793] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:28:36,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777754507] [2023-11-29 04:28:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:36,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:36,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:36,767 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:36,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:28:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:36,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:28:36,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 04:28:36,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 04:28:37,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777754507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:28:37,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:28:37,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2023-11-29 04:28:37,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485870328] [2023-11-29 04:28:37,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:28:37,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 04:28:37,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:37,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 04:28:37,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 04:28:37,011 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 04:28:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:28:37,091 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2023-11-29 04:28:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:28:37,091 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2023-11-29 04:28:37,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:28:37,092 INFO L225 Difference]: With dead ends: 44 [2023-11-29 04:28:37,092 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 04:28:37,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:28:37,094 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:28:37,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 56 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:28:37,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 04:28:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-11-29 04:28:37,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 04:28:37,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-11-29 04:28:37,100 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 34 [2023-11-29 04:28:37,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:28:37,100 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-11-29 04:28:37,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 04:28:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-11-29 04:28:37,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 04:28:37,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:28:37,102 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:28:37,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:28:37,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:37,308 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:28:37,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:37,309 INFO L85 PathProgramCache]: Analyzing trace with hash -350190832, now seen corresponding path program 2 times [2023-11-29 04:28:37,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:37,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423126491] [2023-11-29 04:28:37,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:37,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:37,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:28:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:38,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 04:28:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:38,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 04:28:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 04:28:38,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:38,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423126491] [2023-11-29 04:28:38,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423126491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:28:38,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108071115] [2023-11-29 04:28:38,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:28:38,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:38,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:38,475 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:38,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:28:38,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:28:38,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:28:38,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 04:28:38,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 04:28:38,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 04:28:39,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108071115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:28:39,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:28:39,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2023-11-29 04:28:39,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685878568] [2023-11-29 04:28:39,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:28:39,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 04:28:39,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:39,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 04:28:39,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:28:39,019 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:28:39,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:28:39,231 INFO L93 Difference]: Finished difference Result 65 states and 93 transitions. [2023-11-29 04:28:39,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:28:39,232 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2023-11-29 04:28:39,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:28:39,235 INFO L225 Difference]: With dead ends: 65 [2023-11-29 04:28:39,235 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 04:28:39,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:28:39,237 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 22 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:28:39,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 364 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:28:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 04:28:39,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2023-11-29 04:28:39,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-29 04:28:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2023-11-29 04:28:39,256 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 43 [2023-11-29 04:28:39,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:28:39,257 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2023-11-29 04:28:39,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:28:39,258 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2023-11-29 04:28:39,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 04:28:39,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:28:39,260 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:28:39,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:28:39,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:39,464 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:28:39,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1159537458, now seen corresponding path program 1 times [2023-11-29 04:28:39,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:39,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810719580] [2023-11-29 04:28:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:39,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:40,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:28:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:40,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 04:28:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:40,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 04:28:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 13 proven. 59 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 04:28:40,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:40,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810719580] [2023-11-29 04:28:40,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810719580] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:28:40,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846236397] [2023-11-29 04:28:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:40,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:40,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:40,688 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:40,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:28:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:40,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 04:28:40,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:41,100 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 23 treesize of output 11 [2023-11-29 04:28:41,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:28:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:28:41,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:41,830 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 19 treesize of output 17 [2023-11-29 04:28:41,835 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 24 treesize of output 20 [2023-11-29 04:28:41,984 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 10 treesize of output 6 [2023-11-29 04:28:42,128 INFO L349 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2023-11-29 04:28:42,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-11-29 04:28:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:28:42,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846236397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:28:42,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:28:42,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 18] total 48 [2023-11-29 04:28:42,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807381815] [2023-11-29 04:28:42,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:28:42,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-29 04:28:42,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:42,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-29 04:28:42,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 04:28:42,373 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 48 states, 44 states have (on average 2.159090909090909) internal successors, (95), 45 states have internal predecessors, (95), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-29 04:28:46,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:28:46,259 INFO L93 Difference]: Finished difference Result 291 states and 454 transitions. [2023-11-29 04:28:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-29 04:28:46,260 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 44 states have (on average 2.159090909090909) internal successors, (95), 45 states have internal predecessors, (95), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 43 [2023-11-29 04:28:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:28:46,264 INFO L225 Difference]: With dead ends: 291 [2023-11-29 04:28:46,264 INFO L226 Difference]: Without dead ends: 231 [2023-11-29 04:28:46,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3938 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2059, Invalid=10373, Unknown=0, NotChecked=0, Total=12432 [2023-11-29 04:28:46,273 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 291 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:28:46,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 177 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 04:28:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-11-29 04:28:46,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2023-11-29 04:28:46,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 136 states have (on average 1.3823529411764706) internal successors, (188), 141 states have internal predecessors, (188), 13 states have call successors, (13), 4 states have call predecessors, (13), 9 states have return successors, (45), 13 states have call predecessors, (45), 13 states have call successors, (45) [2023-11-29 04:28:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 246 transitions. [2023-11-29 04:28:46,331 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 246 transitions. Word has length 43 [2023-11-29 04:28:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:28:46,331 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 246 transitions. [2023-11-29 04:28:46,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 44 states have (on average 2.159090909090909) internal successors, (95), 45 states have internal predecessors, (95), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-29 04:28:46,332 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 246 transitions. [2023-11-29 04:28:46,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 04:28:46,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:28:46,336 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:28:46,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:28:46,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 04:28:46,542 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:28:46,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:46,542 INFO L85 PathProgramCache]: Analyzing trace with hash -288151218, now seen corresponding path program 2 times [2023-11-29 04:28:46,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:46,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549895675] [2023-11-29 04:28:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:46,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:47,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:28:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:47,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 04:28:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:47,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 04:28:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 04:28:47,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:47,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549895675] [2023-11-29 04:28:47,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549895675] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:28:47,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210345957] [2023-11-29 04:28:47,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:28:47,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:47,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:47,873 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:47,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:28:47,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:28:47,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:28:47,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 04:28:47,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:48,109 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 8 treesize of output 1 [2023-11-29 04:28:48,234 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 27 treesize of output 15 [2023-11-29 04:28:48,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:28:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:28:48,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:48,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-29 04:28:48,753 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 26 treesize of output 22 [2023-11-29 04:28:48,999 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 7 treesize of output 5 [2023-11-29 04:28:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:28:49,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210345957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:28:49,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:28:49,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 48 [2023-11-29 04:28:49,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163482452] [2023-11-29 04:28:49,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:28:49,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-29 04:28:49,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:49,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-29 04:28:49,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1965, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 04:28:49,123 INFO L87 Difference]: Start difference. First operand 159 states and 246 transitions. Second operand has 48 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 45 states have internal predecessors, (95), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-29 04:28:52,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:28:52,616 INFO L93 Difference]: Finished difference Result 334 states and 495 transitions. [2023-11-29 04:28:52,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-29 04:28:52,617 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 45 states have internal predecessors, (95), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 43 [2023-11-29 04:28:52,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:28:52,620 INFO L225 Difference]: With dead ends: 334 [2023-11-29 04:28:52,620 INFO L226 Difference]: Without dead ends: 224 [2023-11-29 04:28:52,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3781 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1955, Invalid=10035, Unknown=0, NotChecked=0, Total=11990 [2023-11-29 04:28:52,626 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 189 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:28:52,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 387 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 04:28:52,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-11-29 04:28:52,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 149. [2023-11-29 04:28:52,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 124 states have (on average 1.3064516129032258) internal successors, (162), 129 states have internal predecessors, (162), 14 states have call successors, (14), 5 states have call predecessors, (14), 10 states have return successors, (42), 14 states have call predecessors, (42), 14 states have call successors, (42) [2023-11-29 04:28:52,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 218 transitions. [2023-11-29 04:28:52,671 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 218 transitions. Word has length 43 [2023-11-29 04:28:52,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:28:52,671 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 218 transitions. [2023-11-29 04:28:52,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 45 states have internal predecessors, (95), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-29 04:28:52,672 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 218 transitions. [2023-11-29 04:28:52,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 04:28:52,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:28:52,674 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:28:52,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:28:52,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:52,875 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:28:52,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:52,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1097497844, now seen corresponding path program 3 times [2023-11-29 04:28:52,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:52,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25301055] [2023-11-29 04:28:52,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:52,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:53,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:28:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:53,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 04:28:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:53,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 04:28:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 46 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 04:28:53,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:53,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25301055] [2023-11-29 04:28:53,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25301055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:28:53,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610190087] [2023-11-29 04:28:53,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:28:53,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:53,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:53,959 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:53,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:28:54,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 04:28:54,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:28:54,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 04:28:54,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:54,288 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 32 treesize of output 13 [2023-11-29 04:28:54,434 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 17 treesize of output 9 [2023-11-29 04:28:54,484 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 23 treesize of output 1 [2023-11-29 04:28:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 68 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:28:54,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:55,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610190087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:28:55,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:28:55,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 33 [2023-11-29 04:28:55,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247146608] [2023-11-29 04:28:55,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:28:55,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 04:28:55,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:55,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 04:28:55,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 04:28:55,072 INFO L87 Difference]: Start difference. First operand 149 states and 218 transitions. Second operand has 33 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 04:28:59,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:28:59,289 INFO L93 Difference]: Finished difference Result 725 states and 1002 transitions. [2023-11-29 04:28:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-29 04:28:59,289 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2023-11-29 04:28:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:28:59,295 INFO L225 Difference]: With dead ends: 725 [2023-11-29 04:28:59,295 INFO L226 Difference]: Without dead ends: 649 [2023-11-29 04:28:59,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3925 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1329, Invalid=10443, Unknown=0, NotChecked=0, Total=11772 [2023-11-29 04:28:59,300 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 256 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:28:59,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 365 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 04:28:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2023-11-29 04:28:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 368. [2023-11-29 04:28:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 315 states have (on average 1.3365079365079364) internal successors, (421), 330 states have internal predecessors, (421), 24 states have call successors, (24), 13 states have call predecessors, (24), 28 states have return successors, (78), 24 states have call predecessors, (78), 24 states have call successors, (78) [2023-11-29 04:28:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 523 transitions. [2023-11-29 04:28:59,406 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 523 transitions. Word has length 43 [2023-11-29 04:28:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:28:59,406 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 523 transitions. [2023-11-29 04:28:59,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 04:28:59,407 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 523 transitions. [2023-11-29 04:28:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 04:28:59,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:28:59,410 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:28:59,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:28:59,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:59,612 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:28:59,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:59,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1194196334, now seen corresponding path program 4 times [2023-11-29 04:28:59,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:59,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219448653] [2023-11-29 04:28:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:59,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:59,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:28:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:00,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 04:29:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:00,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 04:29:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:29:00,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:29:00,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219448653] [2023-11-29 04:29:00,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219448653] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:29:00,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802466836] [2023-11-29 04:29:00,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:29:00,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:00,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:29:00,273 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:29:00,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:29:00,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:29:00,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:29:00,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 04:29:00,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:29:00,588 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 42 treesize of output 19 [2023-11-29 04:29:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:29:00,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:29:01,053 INFO L349 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2023-11-29 04:29:01,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2023-11-29 04:29:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 62 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 04:29:01,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802466836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:29:01,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:29:01,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 29 [2023-11-29 04:29:01,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498009515] [2023-11-29 04:29:01,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:29:01,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 04:29:01,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:29:01,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 04:29:01,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2023-11-29 04:29:01,123 INFO L87 Difference]: Start difference. First operand 368 states and 523 transitions. Second operand has 29 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 5 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-29 04:29:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:29:02,254 INFO L93 Difference]: Finished difference Result 662 states and 915 transitions. [2023-11-29 04:29:02,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 04:29:02,255 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 5 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 43 [2023-11-29 04:29:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:29:02,259 INFO L225 Difference]: With dead ends: 662 [2023-11-29 04:29:02,259 INFO L226 Difference]: Without dead ends: 471 [2023-11-29 04:29:02,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=2097, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 04:29:02,261 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:29:02,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 211 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 04:29:02,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-11-29 04:29:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 339. [2023-11-29 04:29:02,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 291 states have (on average 1.3195876288659794) internal successors, (384), 305 states have internal predecessors, (384), 19 states have call successors, (19), 14 states have call predecessors, (19), 28 states have return successors, (47), 19 states have call predecessors, (47), 19 states have call successors, (47) [2023-11-29 04:29:02,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 450 transitions. [2023-11-29 04:29:02,346 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 450 transitions. Word has length 43 [2023-11-29 04:29:02,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:29:02,346 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 450 transitions. [2023-11-29 04:29:02,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 5 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-29 04:29:02,347 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 450 transitions. [2023-11-29 04:29:02,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 04:29:02,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:29:02,348 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:29:02,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 04:29:02,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:02,555 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:29:02,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:29:02,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1941503346, now seen corresponding path program 5 times [2023-11-29 04:29:02,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:29:02,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670000271] [2023-11-29 04:29:02,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:29:02,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:29:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:02,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:29:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:03,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 04:29:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:03,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 04:29:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 04:29:03,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:29:03,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670000271] [2023-11-29 04:29:03,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670000271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:29:03,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417486062] [2023-11-29 04:29:03,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:29:03,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:03,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:29:03,140 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:29:03,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:29:03,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 04:29:03,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:29:03,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 04:29:03,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:29:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 04:29:03,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:29:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 04:29:03,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417486062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:29:03,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:29:03,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2023-11-29 04:29:03,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074563540] [2023-11-29 04:29:03,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:29:03,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:29:03,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:29:03,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:29:03,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:29:03,578 INFO L87 Difference]: Start difference. First operand 339 states and 450 transitions. Second operand has 17 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:29:03,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:29:03,848 INFO L93 Difference]: Finished difference Result 594 states and 880 transitions. [2023-11-29 04:29:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:29:03,849 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2023-11-29 04:29:03,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:29:03,854 INFO L225 Difference]: With dead ends: 594 [2023-11-29 04:29:03,854 INFO L226 Difference]: Without dead ends: 590 [2023-11-29 04:29:03,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:29:03,855 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:29:03,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 350 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:29:03,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-11-29 04:29:03,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 481. [2023-11-29 04:29:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 417 states have (on average 1.3836930455635492) internal successors, (577), 441 states have internal predecessors, (577), 25 states have call successors, (25), 14 states have call predecessors, (25), 38 states have return successors, (81), 25 states have call predecessors, (81), 25 states have call successors, (81) [2023-11-29 04:29:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 683 transitions. [2023-11-29 04:29:03,994 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 683 transitions. Word has length 43 [2023-11-29 04:29:03,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:29:03,994 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 683 transitions. [2023-11-29 04:29:03,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:29:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 683 transitions. [2023-11-29 04:29:03,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 04:29:03,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:29:03,997 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:29:04,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 04:29:04,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:29:04,198 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:29:04,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:29:04,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1240438768, now seen corresponding path program 6 times [2023-11-29 04:29:04,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:29:04,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399434000] [2023-11-29 04:29:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:29:04,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:29:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:04,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:29:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:04,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 04:29:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:04,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 04:29:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:29:05,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:29:05,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399434000] [2023-11-29 04:29:05,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399434000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:29:05,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859546910] [2023-11-29 04:29:05,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:29:05,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:05,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:29:05,074 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:29:05,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:29:05,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-29 04:29:05,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:29:05,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 04:29:05,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:29:05,393 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 32 treesize of output 13 [2023-11-29 04:29:05,524 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 31 treesize of output 22 [2023-11-29 04:29:05,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:29:05,588 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-29 04:29:05,589 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 50 treesize of output 29 [2023-11-29 04:29:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:29:05,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:29:06,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859546910] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:29:06,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:29:06,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2023-11-29 04:29:06,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361343114] [2023-11-29 04:29:06,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:29:06,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 04:29:06,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:29:06,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 04:29:06,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 04:29:06,127 INFO L87 Difference]: Start difference. First operand 481 states and 683 transitions. Second operand has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 25 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:29:08,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:29:08,911 INFO L93 Difference]: Finished difference Result 1116 states and 1619 transitions. [2023-11-29 04:29:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 04:29:08,912 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 25 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2023-11-29 04:29:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:29:08,916 INFO L225 Difference]: With dead ends: 1116 [2023-11-29 04:29:08,916 INFO L226 Difference]: Without dead ends: 816 [2023-11-29 04:29:08,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=596, Invalid=4516, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 04:29:08,920 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 145 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:29:08,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 216 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 04:29:08,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2023-11-29 04:29:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 633. [2023-11-29 04:29:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 546 states have (on average 1.3956043956043955) internal successors, (762), 584 states have internal predecessors, (762), 34 states have call successors, (34), 19 states have call predecessors, (34), 52 states have return successors, (98), 29 states have call predecessors, (98), 34 states have call successors, (98) [2023-11-29 04:29:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 894 transitions. [2023-11-29 04:29:09,090 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 894 transitions. Word has length 43 [2023-11-29 04:29:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:29:09,091 INFO L495 AbstractCegarLoop]: Abstraction has 633 states and 894 transitions. [2023-11-29 04:29:09,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 25 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:29:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 894 transitions. [2023-11-29 04:29:09,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 04:29:09,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:29:09,094 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:29:09,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 04:29:09,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 04:29:09,294 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:29:09,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:29:09,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1109978832, now seen corresponding path program 7 times [2023-11-29 04:29:09,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:29:09,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650862327] [2023-11-29 04:29:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:29:09,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:29:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:09,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:29:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:10,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 04:29:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:10,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 04:29:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 49 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:29:10,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:29:10,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650862327] [2023-11-29 04:29:10,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650862327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:29:10,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399365549] [2023-11-29 04:29:10,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:29:10,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:10,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:29:10,246 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:29:10,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:29:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:10,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 04:29:10,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:29:10,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-29 04:29:10,680 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 26 treesize of output 21 [2023-11-29 04:29:10,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:29:10,742 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-29 04:29:10,742 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 45 treesize of output 28 [2023-11-29 04:29:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 50 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:29:10,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:29:11,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399365549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:29:11,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:29:11,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2023-11-29 04:29:11,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073545914] [2023-11-29 04:29:11,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:29:11,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 04:29:11,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:29:11,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 04:29:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 04:29:11,333 INFO L87 Difference]: Start difference. First operand 633 states and 894 transitions. Second operand has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 04:29:15,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:29:15,029 INFO L93 Difference]: Finished difference Result 1111 states and 1569 transitions. [2023-11-29 04:29:15,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 04:29:15,029 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2023-11-29 04:29:15,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:29:15,035 INFO L225 Difference]: With dead ends: 1111 [2023-11-29 04:29:15,036 INFO L226 Difference]: Without dead ends: 971 [2023-11-29 04:29:15,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1226, Invalid=8476, Unknown=0, NotChecked=0, Total=9702 [2023-11-29 04:29:15,041 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 176 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:29:15,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 259 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 04:29:15,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2023-11-29 04:29:15,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 716. [2023-11-29 04:29:15,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 619 states have (on average 1.3990306946688207) internal successors, (866), 663 states have internal predecessors, (866), 39 states have call successors, (39), 22 states have call predecessors, (39), 57 states have return successors, (103), 30 states have call predecessors, (103), 39 states have call successors, (103) [2023-11-29 04:29:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1008 transitions. [2023-11-29 04:29:15,262 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1008 transitions. Word has length 43 [2023-11-29 04:29:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:29:15,262 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 1008 transitions. [2023-11-29 04:29:15,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 04:29:15,263 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1008 transitions. [2023-11-29 04:29:15,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 04:29:15,264 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:29:15,265 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:29:15,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 04:29:15,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 04:29:15,465 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:29:15,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:29:15,466 INFO L85 PathProgramCache]: Analyzing trace with hash 219730896, now seen corresponding path program 1 times [2023-11-29 04:29:15,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:29:15,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885075801] [2023-11-29 04:29:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:29:15,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:29:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:15,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:29:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:15,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 04:29:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:16,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 04:29:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 04:29:16,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:29:16,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885075801] [2023-11-29 04:29:16,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885075801] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:29:16,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558910505] [2023-11-29 04:29:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:29:16,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:16,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:29:16,097 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:29:16,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:29:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:16,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 04:29:16,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:29:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 04:29:16,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:29:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 04:29:16,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558910505] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:29:16,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:29:16,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2023-11-29 04:29:16,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038143171] [2023-11-29 04:29:16,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:29:16,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:29:16,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:29:16,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:29:16,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:29:16,490 INFO L87 Difference]: Start difference. First operand 716 states and 1008 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:29:16,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:29:16,936 INFO L93 Difference]: Finished difference Result 1095 states and 1680 transitions. [2023-11-29 04:29:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:29:16,937 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2023-11-29 04:29:16,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:29:16,944 INFO L225 Difference]: With dead ends: 1095 [2023-11-29 04:29:16,944 INFO L226 Difference]: Without dead ends: 1091 [2023-11-29 04:29:16,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:29:16,946 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 20 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:29:16,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 490 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:29:16,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2023-11-29 04:29:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 819. [2023-11-29 04:29:17,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 711 states have (on average 1.420534458509142) internal successors, (1010), 762 states have internal predecessors, (1010), 43 states have call successors, (43), 22 states have call predecessors, (43), 64 states have return successors, (132), 34 states have call predecessors, (132), 43 states have call successors, (132) [2023-11-29 04:29:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1185 transitions. [2023-11-29 04:29:17,253 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1185 transitions. Word has length 43 [2023-11-29 04:29:17,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:29:17,253 INFO L495 AbstractCegarLoop]: Abstraction has 819 states and 1185 transitions. [2023-11-29 04:29:17,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:29:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1185 transitions. [2023-11-29 04:29:17,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 04:29:17,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:29:17,257 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:29:17,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 04:29:17,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 04:29:17,457 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:29:17,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:29:17,458 INFO L85 PathProgramCache]: Analyzing trace with hash -977974224, now seen corresponding path program 8 times [2023-11-29 04:29:17,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:29:17,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021210821] [2023-11-29 04:29:17,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:29:17,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:29:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:17,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:29:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:17,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 04:29:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:17,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-29 04:29:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 04:29:17,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:29:17,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021210821] [2023-11-29 04:29:17,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021210821] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:29:17,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096119936] [2023-11-29 04:29:17,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:29:17,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:17,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:29:17,598 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:29:17,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:29:17,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:29:17,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:29:17,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:29:17,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:29:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 46 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 04:29:17,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:29:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 04:29:17,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096119936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:29:17,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:29:17,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2023-11-29 04:29:17,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664107014] [2023-11-29 04:29:17,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:29:17,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 04:29:17,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:29:17,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 04:29:17,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:29:17,811 INFO L87 Difference]: Start difference. First operand 819 states and 1185 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 04:29:18,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:29:18,082 INFO L93 Difference]: Finished difference Result 1025 states and 1465 transitions. [2023-11-29 04:29:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:29:18,083 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 45 [2023-11-29 04:29:18,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:29:18,086 INFO L225 Difference]: With dead ends: 1025 [2023-11-29 04:29:18,086 INFO L226 Difference]: Without dead ends: 798 [2023-11-29 04:29:18,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:29:18,088 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:29:18,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 120 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:29:18,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2023-11-29 04:29:18,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 692. [2023-11-29 04:29:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 599 states have (on average 1.4040066777963272) internal successors, (841), 643 states have internal predecessors, (841), 35 states have call successors, (35), 18 states have call predecessors, (35), 57 states have return successors, (118), 30 states have call predecessors, (118), 35 states have call successors, (118) [2023-11-29 04:29:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 994 transitions. [2023-11-29 04:29:18,242 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 994 transitions. Word has length 45 [2023-11-29 04:29:18,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:29:18,242 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 994 transitions. [2023-11-29 04:29:18,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 04:29:18,242 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 994 transitions. [2023-11-29 04:29:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 04:29:18,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:29:18,244 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:29:18,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 04:29:18,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 04:29:18,445 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:29:18,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:29:18,445 INFO L85 PathProgramCache]: Analyzing trace with hash -347314300, now seen corresponding path program 3 times [2023-11-29 04:29:18,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:29:18,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599517785] [2023-11-29 04:29:18,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:29:18,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:29:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:18,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:29:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:18,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 04:29:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:18,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 04:29:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 31 proven. 57 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:29:18,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:29:18,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599517785] [2023-11-29 04:29:18,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599517785] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:29:18,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566493114] [2023-11-29 04:29:18,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:29:18,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:18,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:29:18,597 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:29:18,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 04:29:18,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 04:29:18,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:29:18,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:29:18,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:29:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 66 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 04:29:18,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:29:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 04:29:18,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566493114] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:29:18,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:29:18,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 18 [2023-11-29 04:29:18,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468422302] [2023-11-29 04:29:18,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:29:18,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 04:29:18,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:29:18,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 04:29:18,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:29:18,904 INFO L87 Difference]: Start difference. First operand 692 states and 994 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 04:29:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:29:19,231 INFO L93 Difference]: Finished difference Result 981 states and 1373 transitions. [2023-11-29 04:29:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:29:19,231 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2023-11-29 04:29:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:29:19,234 INFO L225 Difference]: With dead ends: 981 [2023-11-29 04:29:19,235 INFO L226 Difference]: Without dead ends: 539 [2023-11-29 04:29:19,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2023-11-29 04:29:19,237 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 47 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:29:19,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 212 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:29:19,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2023-11-29 04:29:19,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 466. [2023-11-29 04:29:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 411 states have (on average 1.391727493917275) internal successors, (572), 437 states have internal predecessors, (572), 23 states have call successors, (23), 10 states have call predecessors, (23), 31 states have return successors, (73), 18 states have call predecessors, (73), 23 states have call successors, (73) [2023-11-29 04:29:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 668 transitions. [2023-11-29 04:29:19,461 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 668 transitions. Word has length 46 [2023-11-29 04:29:19,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:29:19,462 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 668 transitions. [2023-11-29 04:29:19,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 04:29:19,462 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 668 transitions. [2023-11-29 04:29:19,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 04:29:19,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:29:19,465 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:29:19,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 04:29:19,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 04:29:19,671 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:29:19,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:29:19,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1884373451, now seen corresponding path program 4 times [2023-11-29 04:29:19,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:29:19,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698546160] [2023-11-29 04:29:19,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:29:19,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:29:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:20,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:29:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:20,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:29:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:20,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 04:29:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 04:29:20,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:29:20,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698546160] [2023-11-29 04:29:20,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698546160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:29:20,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162379953] [2023-11-29 04:29:20,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:29:20,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:20,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:29:20,265 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:29:20,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 04:29:20,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:29:20,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:29:20,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 04:29:20,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:29:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 04:29:20,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:29:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 04:29:20,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162379953] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:29:20,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:29:20,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2023-11-29 04:29:20,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026014089] [2023-11-29 04:29:20,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:29:20,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 04:29:20,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:29:20,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 04:29:20,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:29:20,665 INFO L87 Difference]: Start difference. First operand 466 states and 668 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:29:20,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:29:20,957 INFO L93 Difference]: Finished difference Result 695 states and 1093 transitions. [2023-11-29 04:29:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 04:29:20,958 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2023-11-29 04:29:20,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:29:20,962 INFO L225 Difference]: With dead ends: 695 [2023-11-29 04:29:20,963 INFO L226 Difference]: Without dead ends: 691 [2023-11-29 04:29:20,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:29:20,964 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 26 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:29:20,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 466 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:29:20,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2023-11-29 04:29:21,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 533. [2023-11-29 04:29:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 471 states have (on average 1.414012738853503) internal successors, (666), 502 states have internal predecessors, (666), 26 states have call successors, (26), 10 states have call predecessors, (26), 35 states have return successors, (92), 20 states have call predecessors, (92), 26 states have call successors, (92) [2023-11-29 04:29:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 784 transitions. [2023-11-29 04:29:21,166 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 784 transitions. Word has length 53 [2023-11-29 04:29:21,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:29:21,166 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 784 transitions. [2023-11-29 04:29:21,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:29:21,167 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 784 transitions. [2023-11-29 04:29:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 04:29:21,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:29:21,170 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:29:21,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 04:29:21,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 04:29:21,370 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:29:21,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:29:21,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1601247219, now seen corresponding path program 9 times [2023-11-29 04:29:21,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:29:21,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521071528] [2023-11-29 04:29:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:29:21,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:29:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:22,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:29:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:22,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:29:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:22,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 04:29:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 18 proven. 123 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:29:22,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:29:22,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521071528] [2023-11-29 04:29:22,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521071528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:29:22,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655238355] [2023-11-29 04:29:22,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:29:22,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:22,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:29:22,524 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:29:22,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 04:29:22,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-29 04:29:22,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:29:22,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 04:29:22,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:29:22,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-29 04:29:22,810 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 17 treesize of output 9 [2023-11-29 04:29:22,849 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 23 treesize of output 1 [2023-11-29 04:29:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 74 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 04:29:23,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:29:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 77 proven. 43 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 04:29:23,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655238355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:29:23,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:29:23,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15, 13] total 44 [2023-11-29 04:29:23,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120516424] [2023-11-29 04:29:23,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:29:23,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 04:29:23,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:29:23,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 04:29:23,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1739, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 04:29:23,711 INFO L87 Difference]: Start difference. First operand 533 states and 784 transitions. Second operand has 44 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 6 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-29 04:29:54,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:29:54,112 INFO L93 Difference]: Finished difference Result 2705 states and 4141 transitions. [2023-11-29 04:29:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 449 states. [2023-11-29 04:29:54,112 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 6 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 53 [2023-11-29 04:29:54,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:29:54,125 INFO L225 Difference]: With dead ends: 2705 [2023-11-29 04:29:54,125 INFO L226 Difference]: Without dead ends: 2426 [2023-11-29 04:29:54,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 476 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99799 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=16694, Invalid=211312, Unknown=0, NotChecked=0, Total=228006 [2023-11-29 04:29:54,150 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 618 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:29:54,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 142 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 04:29:54,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2023-11-29 04:29:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1231. [2023-11-29 04:29:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1123 states have (on average 1.421193232413179) internal successors, (1596), 1180 states have internal predecessors, (1596), 39 states have call successors, (39), 20 states have call predecessors, (39), 68 states have return successors, (187), 30 states have call predecessors, (187), 39 states have call successors, (187) [2023-11-29 04:29:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1822 transitions. [2023-11-29 04:29:54,674 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1822 transitions. Word has length 53 [2023-11-29 04:29:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:29:54,675 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1822 transitions. [2023-11-29 04:29:54,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 6 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-29 04:29:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1822 transitions. [2023-11-29 04:29:54,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 04:29:54,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:29:54,679 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:29:54,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 04:29:54,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 04:29:54,880 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:29:54,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:29:54,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1183308873, now seen corresponding path program 10 times [2023-11-29 04:29:54,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:29:54,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299401461] [2023-11-29 04:29:54,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:29:54,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:29:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:55,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:29:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:55,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:29:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:55,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 04:29:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:29:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:29:56,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:29:56,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299401461] [2023-11-29 04:29:56,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299401461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:29:56,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677914100] [2023-11-29 04:29:56,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:29:56,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:29:56,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:29:56,068 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:29:56,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 04:29:56,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:29:56,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:29:56,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 04:29:56,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:29:56,475 INFO L349 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-11-29 04:29:56,475 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 2 case distinctions, treesize of input 36 treesize of output 42 [2023-11-29 04:30:00,597 INFO L349 Elim1Store]: treesize reduction 99, result has 28.3 percent of original size [2023-11-29 04:30:00,598 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 56 treesize of output 70 [2023-11-29 04:30:08,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:30:08,714 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 46 treesize of output 18 [2023-11-29 04:30:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 21 proven. 127 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:30:22,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:23,562 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 81 treesize of output 71 [2023-11-29 04:30:23,603 INFO L349 Elim1Store]: treesize reduction 20, result has 53.5 percent of original size [2023-11-29 04:30:23,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 788 treesize of output 650 [2023-11-29 04:30:23,789 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:30:23,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2023-11-29 04:30:23,798 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 6 [2023-11-29 04:30:23,826 INFO L349 Elim1Store]: treesize reduction 8, result has 80.0 percent of original size [2023-11-29 04:30:23,827 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 47 treesize of output 61 [2023-11-29 04:30:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 8 proven. 137 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:30:24,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677914100] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:24,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:24,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 22] total 57 [2023-11-29 04:30:24,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765484724] [2023-11-29 04:30:24,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:24,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-29 04:30:24,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:24,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-29 04:30:24,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2928, Unknown=7, NotChecked=0, Total=3192 [2023-11-29 04:30:24,123 INFO L87 Difference]: Start difference. First operand 1231 states and 1822 transitions. Second operand has 57 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 56 states have internal predecessors, (116), 6 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-29 04:30:26,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:30:28,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 04:30:31,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.73s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 04:30:33,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 04:30:35,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 04:30:37,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 04:30:39,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 04:30:43,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 04:30:52,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:30:56,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:31:04,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:31:08,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 04:31:13,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 04:31:17,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:31:21,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:31:25,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 04:31:35,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:31:40,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:31:56,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.71s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:32:00,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:32:15,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:32:19,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:32:23,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:32:46,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:32:50,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 04:32:54,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:32:58,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 04:33:02,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:33:06,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:33:10,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:33:15,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:33:23,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 04:33:39,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:33:47,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:33:52,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:33:56,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:00,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:04,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:12,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:33,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:37,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:41,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:45,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:49,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:58,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 04:35:30,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:35:39,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:35:51,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:35:55,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:35:59,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:36:07,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:36:11,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:36:32,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:36:36,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:38:55,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:38:59,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:39:03,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:39:07,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:39:11,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:39:15,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:39:19,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:39:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:39:19,536 INFO L93 Difference]: Finished difference Result 3058 states and 4472 transitions. [2023-11-29 04:39:19,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2023-11-29 04:39:19,536 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 56 states have internal predecessors, (116), 6 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 53 [2023-11-29 04:39:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:39:19,546 INFO L225 Difference]: With dead ends: 3058 [2023-11-29 04:39:19,546 INFO L226 Difference]: Without dead ends: 2317 [2023-11-29 04:39:19,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 16051 ImplicationChecksByTransitivity, 329.3s TimeCoverageRelationStatistics Valid=4301, Invalid=38686, Unknown=69, NotChecked=0, Total=43056 [2023-11-29 04:39:19,551 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 403 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 2241 mSolverCounterSat, 157 mSolverCounterUnsat, 61 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 232.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 2459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2241 IncrementalHoareTripleChecker+Invalid, 61 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 232.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:39:19,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 245 Invalid, 2459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2241 Invalid, 61 Unknown, 0 Unchecked, 232.6s Time] [2023-11-29 04:39:19,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2023-11-29 04:39:20,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 1456. [2023-11-29 04:39:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1292 states have (on average 1.3359133126934986) internal successors, (1726), 1372 states have internal predecessors, (1726), 55 states have call successors, (55), 38 states have call predecessors, (55), 108 states have return successors, (276), 45 states have call predecessors, (276), 55 states have call successors, (276) [2023-11-29 04:39:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 2057 transitions. [2023-11-29 04:39:20,099 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 2057 transitions. Word has length 53 [2023-11-29 04:39:20,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:39:20,099 INFO L495 AbstractCegarLoop]: Abstraction has 1456 states and 2057 transitions. [2023-11-29 04:39:20,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 56 states have internal predecessors, (116), 6 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-29 04:39:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 2057 transitions. [2023-11-29 04:39:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 04:39:20,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:39:20,103 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:20,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 04:39:20,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 04:39:20,304 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:39:20,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:20,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1636226957, now seen corresponding path program 11 times [2023-11-29 04:39:20,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:39:20,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819667885] [2023-11-29 04:39:20,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:20,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:39:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:20,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:39:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:21,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:39:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:21,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 04:39:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 04:39:21,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:39:21,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819667885] [2023-11-29 04:39:21,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819667885] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:39:21,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326922287] [2023-11-29 04:39:21,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:39:21,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:39:21,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:39:21,531 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:39:21,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 04:39:21,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 04:39:21,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:39:21,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 04:39:21,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:21,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 14 [2023-11-29 04:39:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 83 proven. 52 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:39:22,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:39:23,205 INFO L349 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2023-11-29 04:39:23,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2023-11-29 04:39:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:39:23,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326922287] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:39:23,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:39:23,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 17] total 43 [2023-11-29 04:39:23,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855960101] [2023-11-29 04:39:23,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:39:23,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 04:39:23,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:39:23,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 04:39:23,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 04:39:23,406 INFO L87 Difference]: Start difference. First operand 1456 states and 2057 transitions. Second operand has 43 states, 41 states have (on average 2.292682926829268) internal successors, (94), 41 states have internal predecessors, (94), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-29 04:39:34,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:39:34,371 INFO L93 Difference]: Finished difference Result 5379 states and 7840 transitions. [2023-11-29 04:39:34,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-11-29 04:39:34,372 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.292682926829268) internal successors, (94), 41 states have internal predecessors, (94), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 53 [2023-11-29 04:39:34,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:39:34,387 INFO L225 Difference]: With dead ends: 5379 [2023-11-29 04:39:34,387 INFO L226 Difference]: Without dead ends: 4281 [2023-11-29 04:39:34,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7415 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2346, Invalid=18534, Unknown=0, NotChecked=0, Total=20880 [2023-11-29 04:39:34,392 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 498 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:39:34,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 559 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 04:39:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2023-11-29 04:39:35,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 2213. [2023-11-29 04:39:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 1981 states have (on average 1.3619384149419484) internal successors, (2698), 2096 states have internal predecessors, (2698), 72 states have call successors, (72), 49 states have call predecessors, (72), 159 states have return successors, (417), 67 states have call predecessors, (417), 72 states have call successors, (417) [2023-11-29 04:39:35,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 3187 transitions. [2023-11-29 04:39:35,415 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 3187 transitions. Word has length 53 [2023-11-29 04:39:35,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:39:35,416 INFO L495 AbstractCegarLoop]: Abstraction has 2213 states and 3187 transitions. [2023-11-29 04:39:35,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.292682926829268) internal successors, (94), 41 states have internal predecessors, (94), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-29 04:39:35,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 3187 transitions. [2023-11-29 04:39:35,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 04:39:35,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:39:35,420 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:35,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 04:39:35,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:39:35,620 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:39:35,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:35,620 INFO L85 PathProgramCache]: Analyzing trace with hash 988065655, now seen corresponding path program 12 times [2023-11-29 04:39:35,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:39:35,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719634822] [2023-11-29 04:39:35,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:35,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:39:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:35,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:39:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:36,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:39:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:36,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 04:39:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 04:39:36,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:39:36,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719634822] [2023-11-29 04:39:36,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719634822] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:39:36,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045307615] [2023-11-29 04:39:36,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:39:36,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:39:36,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:39:36,238 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:39:36,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 04:39:36,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 04:39:36,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:39:36,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 04:39:36,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 04:39:36,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:39:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 04:39:36,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045307615] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:39:36,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:39:36,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2023-11-29 04:39:36,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046165071] [2023-11-29 04:39:36,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:39:36,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:39:36,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:39:36,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:39:36,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:39:36,852 INFO L87 Difference]: Start difference. First operand 2213 states and 3187 transitions. Second operand has 17 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:39:38,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:39:38,125 INFO L93 Difference]: Finished difference Result 2684 states and 3993 transitions. [2023-11-29 04:39:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:39:38,126 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2023-11-29 04:39:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:39:38,135 INFO L225 Difference]: With dead ends: 2684 [2023-11-29 04:39:38,135 INFO L226 Difference]: Without dead ends: 2680 [2023-11-29 04:39:38,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:39:38,137 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:39:38,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 484 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:39:38,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2023-11-29 04:39:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2261. [2023-11-29 04:39:39,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 2015 states have (on average 1.3602977667493796) internal successors, (2741), 2141 states have internal predecessors, (2741), 76 states have call successors, (76), 49 states have call predecessors, (76), 169 states have return successors, (466), 70 states have call predecessors, (466), 76 states have call successors, (466) [2023-11-29 04:39:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 3283 transitions. [2023-11-29 04:39:39,070 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 3283 transitions. Word has length 53 [2023-11-29 04:39:39,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:39:39,071 INFO L495 AbstractCegarLoop]: Abstraction has 2261 states and 3283 transitions. [2023-11-29 04:39:39,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:39:39,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 3283 transitions. [2023-11-29 04:39:39,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 04:39:39,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:39:39,075 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:39,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 04:39:39,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:39:39,275 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:39:39,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:39,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1063273671, now seen corresponding path program 13 times [2023-11-29 04:39:39,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:39:39,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018137152] [2023-11-29 04:39:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:39,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:39:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:39,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:39:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:39,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:39:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:40,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 04:39:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 10 proven. 133 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:39:40,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:39:40,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018137152] [2023-11-29 04:39:40,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018137152] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:39:40,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451684776] [2023-11-29 04:39:40,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:39:40,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:39:40,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:39:40,505 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:39:40,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 04:39:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:40,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 04:39:40,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:40,759 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 8 treesize of output 1 [2023-11-29 04:39:40,964 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 27 treesize of output 15 [2023-11-29 04:39:41,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:39:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 13 proven. 127 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:39:41,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:39:41,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-29 04:39:41,953 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 26 treesize of output 22 [2023-11-29 04:39:42,413 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 7 treesize of output 5 [2023-11-29 04:39:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 10 proven. 127 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 04:39:42,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451684776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:39:42,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:39:42,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 20] total 52 [2023-11-29 04:39:42,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776248943] [2023-11-29 04:39:42,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:39:42,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-29 04:39:42,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:39:42,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-29 04:39:42,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2364, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 04:39:42,595 INFO L87 Difference]: Start difference. First operand 2261 states and 3283 transitions. Second operand has 52 states, 47 states have (on average 2.276595744680851) internal successors, (107), 49 states have internal predecessors, (107), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 04:39:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:39:49,894 INFO L93 Difference]: Finished difference Result 2855 states and 4079 transitions. [2023-11-29 04:39:49,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-29 04:39:49,895 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 47 states have (on average 2.276595744680851) internal successors, (107), 49 states have internal predecessors, (107), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 53 [2023-11-29 04:39:49,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:39:49,904 INFO L225 Difference]: With dead ends: 2855 [2023-11-29 04:39:49,904 INFO L226 Difference]: Without dead ends: 2769 [2023-11-29 04:39:49,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1765, Invalid=10891, Unknown=0, NotChecked=0, Total=12656 [2023-11-29 04:39:49,906 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 171 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:39:49,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 732 Invalid, 2244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 04:39:49,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2023-11-29 04:39:50,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 2169. [2023-11-29 04:39:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 1927 states have (on average 1.3528801245459263) internal successors, (2607), 2049 states have internal predecessors, (2607), 76 states have call successors, (76), 49 states have call predecessors, (76), 165 states have return successors, (449), 70 states have call predecessors, (449), 76 states have call successors, (449) [2023-11-29 04:39:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3132 transitions. [2023-11-29 04:39:50,863 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3132 transitions. Word has length 53 [2023-11-29 04:39:50,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:39:50,864 INFO L495 AbstractCegarLoop]: Abstraction has 2169 states and 3132 transitions. [2023-11-29 04:39:50,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 47 states have (on average 2.276595744680851) internal successors, (107), 49 states have internal predecessors, (107), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 04:39:50,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3132 transitions. [2023-11-29 04:39:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 04:39:50,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:39:50,869 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:50,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 04:39:51,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 04:39:51,070 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:39:51,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:51,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1872620297, now seen corresponding path program 14 times [2023-11-29 04:39:51,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:39:51,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830079211] [2023-11-29 04:39:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:51,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:39:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:51,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:39:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:51,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:39:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:51,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 04:39:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 04:39:51,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:39:51,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830079211] [2023-11-29 04:39:51,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830079211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:39:51,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055438670] [2023-11-29 04:39:51,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:39:51,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:39:51,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:39:51,683 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:39:51,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 04:39:51,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:39:51,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:39:51,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 04:39:51,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 04:39:51,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:39:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 04:39:52,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055438670] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:39:52,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:39:52,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2023-11-29 04:39:52,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822458474] [2023-11-29 04:39:52,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:39:52,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 04:39:52,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:39:52,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 04:39:52,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:39:52,319 INFO L87 Difference]: Start difference. First operand 2169 states and 3132 transitions. Second operand has 20 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 16 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:39:53,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:39:53,885 INFO L93 Difference]: Finished difference Result 3280 states and 5204 transitions. [2023-11-29 04:39:53,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 04:39:53,885 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 16 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2023-11-29 04:39:53,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:39:53,899 INFO L225 Difference]: With dead ends: 3280 [2023-11-29 04:39:53,899 INFO L226 Difference]: Without dead ends: 3276 [2023-11-29 04:39:53,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-11-29 04:39:53,901 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 21 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:39:53,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 591 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:39:53,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2023-11-29 04:39:55,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2023-11-29 04:39:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2322 states have (on average 1.3738156761412574) internal successors, (3190), 2472 states have internal predecessors, (3190), 90 states have call successors, (90), 49 states have call predecessors, (90), 190 states have return successors, (601), 81 states have call predecessors, (601), 90 states have call successors, (601) [2023-11-29 04:39:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 3881 transitions. [2023-11-29 04:39:55,122 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 3881 transitions. Word has length 53 [2023-11-29 04:39:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:39:55,122 INFO L495 AbstractCegarLoop]: Abstraction has 2603 states and 3881 transitions. [2023-11-29 04:39:55,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 16 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:39:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 3881 transitions. [2023-11-29 04:39:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 04:39:55,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:39:55,128 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:55,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 04:39:55,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:39:55,328 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:39:55,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:55,328 INFO L85 PathProgramCache]: Analyzing trace with hash 999818809, now seen corresponding path program 15 times [2023-11-29 04:39:55,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:39:55,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944170997] [2023-11-29 04:39:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:55,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:39:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:55,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:39:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:55,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:39:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:55,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 04:39:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 04:39:55,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:39:55,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944170997] [2023-11-29 04:39:55,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944170997] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:39:55,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594285736] [2023-11-29 04:39:55,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:39:55,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:39:55,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:39:55,861 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:39:55,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 04:39:56,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-29 04:39:56,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:39:56,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 04:39:56,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 04:39:56,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:39:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 04:39:56,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594285736] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:39:56,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:39:56,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2023-11-29 04:39:56,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039517406] [2023-11-29 04:39:56,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:39:56,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:39:56,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:39:56,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:39:56,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:39:56,746 INFO L87 Difference]: Start difference. First operand 2603 states and 3881 transitions. Second operand has 17 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:39:58,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:39:58,238 INFO L93 Difference]: Finished difference Result 3081 states and 4869 transitions. [2023-11-29 04:39:58,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:39:58,238 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2023-11-29 04:39:58,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:39:58,250 INFO L225 Difference]: With dead ends: 3081 [2023-11-29 04:39:58,250 INFO L226 Difference]: Without dead ends: 3077 [2023-11-29 04:39:58,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:39:58,252 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 18 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:39:58,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 431 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:39:58,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2023-11-29 04:39:59,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2671. [2023-11-29 04:39:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2671 states, 2372 states have (on average 1.370151770657673) internal successors, (3250), 2534 states have internal predecessors, (3250), 97 states have call successors, (97), 49 states have call predecessors, (97), 201 states have return successors, (721), 87 states have call predecessors, (721), 97 states have call successors, (721) [2023-11-29 04:39:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 4068 transitions. [2023-11-29 04:39:59,550 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 4068 transitions. Word has length 53 [2023-11-29 04:39:59,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:39:59,550 INFO L495 AbstractCegarLoop]: Abstraction has 2671 states and 4068 transitions. [2023-11-29 04:39:59,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:39:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 4068 transitions. [2023-11-29 04:39:59,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 04:39:59,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:39:59,555 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:59,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 04:39:59,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:39:59,755 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:39:59,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:59,756 INFO L85 PathProgramCache]: Analyzing trace with hash 54788595, now seen corresponding path program 16 times [2023-11-29 04:39:59,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:39:59,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130750010] [2023-11-29 04:39:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:59,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:39:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:00,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:40:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:00,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:40:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:00,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 04:40:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 36 proven. 97 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 04:40:01,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:40:01,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130750010] [2023-11-29 04:40:01,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130750010] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:40:01,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332972563] [2023-11-29 04:40:01,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:40:01,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:01,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:40:01,160 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:40:01,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 04:40:01,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:40:01,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:40:01,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 04:40:01,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:40:01,721 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 33 treesize of output 14 [2023-11-29 04:40:02,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:02,040 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 04:40:02,040 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 1 case distinctions, treesize of input 32 treesize of output 34 [2023-11-29 04:40:02,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:02,163 INFO L349 Elim1Store]: treesize reduction 20, result has 50.0 percent of original size [2023-11-29 04:40:02,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 60 [2023-11-29 04:40:02,485 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:40:02,486 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 04:40:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 4 proven. 133 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 04:40:03,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:40:03,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332972563] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:40:03,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:40:03,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 41 [2023-11-29 04:40:03,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388081051] [2023-11-29 04:40:03,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:40:03,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 04:40:03,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:40:03,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 04:40:03,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2224, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 04:40:03,815 INFO L87 Difference]: Start difference. First operand 2671 states and 4068 transitions. Second operand has 41 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 04:40:11,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:40:11,152 INFO L93 Difference]: Finished difference Result 4771 states and 7078 transitions. [2023-11-29 04:40:11,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-29 04:40:11,153 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 53 [2023-11-29 04:40:11,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:40:11,163 INFO L225 Difference]: With dead ends: 4771 [2023-11-29 04:40:11,163 INFO L226 Difference]: Without dead ends: 3880 [2023-11-29 04:40:11,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2984 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=892, Invalid=8614, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 04:40:11,167 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 184 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:40:11,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 376 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 04:40:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2023-11-29 04:40:12,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 3147. [2023-11-29 04:40:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3147 states, 2804 states have (on average 1.3605563480741798) internal successors, (3815), 2985 states have internal predecessors, (3815), 116 states have call successors, (116), 60 states have call predecessors, (116), 226 states have return successors, (770), 101 states have call predecessors, (770), 116 states have call successors, (770) [2023-11-29 04:40:12,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3147 states to 3147 states and 4701 transitions. [2023-11-29 04:40:12,589 INFO L78 Accepts]: Start accepts. Automaton has 3147 states and 4701 transitions. Word has length 53 [2023-11-29 04:40:12,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:40:12,589 INFO L495 AbstractCegarLoop]: Abstraction has 3147 states and 4701 transitions. [2023-11-29 04:40:12,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 04:40:12,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3147 states and 4701 transitions. [2023-11-29 04:40:12,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 04:40:12,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:40:12,594 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:40:12,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 04:40:12,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:12,795 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:40:12,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:40:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1938742705, now seen corresponding path program 17 times [2023-11-29 04:40:12,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:40:12,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793802282] [2023-11-29 04:40:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:40:12,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:40:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:13,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:40:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:13,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:40:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:13,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 04:40:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 04:40:13,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:40:13,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793802282] [2023-11-29 04:40:13,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793802282] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:40:13,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194858222] [2023-11-29 04:40:13,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:40:13,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:13,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:40:13,379 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:40:13,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 04:40:13,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 04:40:13,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:40:13,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 04:40:13,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:40:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 04:40:13,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:40:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 04:40:14,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194858222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:40:14,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:40:14,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 21 [2023-11-29 04:40:14,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114915000] [2023-11-29 04:40:14,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:40:14,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 04:40:14,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:40:14,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 04:40:14,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2023-11-29 04:40:14,203 INFO L87 Difference]: Start difference. First operand 3147 states and 4701 transitions. Second operand has 21 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 04:40:16,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:40:16,449 INFO L93 Difference]: Finished difference Result 4412 states and 7359 transitions. [2023-11-29 04:40:16,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 04:40:16,450 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2023-11-29 04:40:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:40:16,467 INFO L225 Difference]: With dead ends: 4412 [2023-11-29 04:40:16,468 INFO L226 Difference]: Without dead ends: 4408 [2023-11-29 04:40:16,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-11-29 04:40:16,470 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 20 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:40:16,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 577 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:40:16,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2023-11-29 04:40:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 3551. [2023-11-29 04:40:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3177 states have (on average 1.377400062952471) internal successors, (4376), 3379 states have internal predecessors, (4376), 128 states have call successors, (128), 59 states have call predecessors, (128), 245 states have return successors, (906), 112 states have call predecessors, (906), 128 states have call successors, (906) [2023-11-29 04:40:18,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 5410 transitions. [2023-11-29 04:40:18,555 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 5410 transitions. Word has length 53 [2023-11-29 04:40:18,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:40:18,555 INFO L495 AbstractCegarLoop]: Abstraction has 3551 states and 5410 transitions. [2023-11-29 04:40:18,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 04:40:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 5410 transitions. [2023-11-29 04:40:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 04:40:18,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:40:18,562 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:40:18,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 04:40:18,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 04:40:18,762 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:40:18,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:40:18,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1950495859, now seen corresponding path program 2 times [2023-11-29 04:40:18,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:40:18,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099265022] [2023-11-29 04:40:18,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:40:18,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:40:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:19,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:40:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:19,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:40:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:19,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 04:40:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 04:40:19,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:40:19,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099265022] [2023-11-29 04:40:19,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099265022] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:40:19,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107378526] [2023-11-29 04:40:19,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:40:19,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:19,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:40:19,408 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:40:19,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 04:40:19,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:40:19,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:40:19,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 04:40:19,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:40:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 04:40:19,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:40:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 04:40:20,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107378526] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:40:20,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:40:20,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2023-11-29 04:40:20,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421623618] [2023-11-29 04:40:20,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:40:20,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 04:40:20,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:40:20,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 04:40:20,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:40:20,230 INFO L87 Difference]: Start difference. First operand 3551 states and 5410 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:40:22,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:40:22,671 INFO L93 Difference]: Finished difference Result 4593 states and 7608 transitions. [2023-11-29 04:40:22,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 04:40:22,672 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2023-11-29 04:40:22,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:40:22,688 INFO L225 Difference]: With dead ends: 4593 [2023-11-29 04:40:22,688 INFO L226 Difference]: Without dead ends: 4589 [2023-11-29 04:40:22,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:40:22,690 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 27 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:40:22,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 601 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:40:22,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2023-11-29 04:40:24,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 3812. [2023-11-29 04:40:24,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3812 states, 3407 states have (on average 1.3845024948635163) internal successors, (4717), 3632 states have internal predecessors, (4717), 139 states have call successors, (139), 59 states have call predecessors, (139), 265 states have return successors, (1075), 120 states have call predecessors, (1075), 139 states have call successors, (1075) [2023-11-29 04:40:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 5931 transitions. [2023-11-29 04:40:24,887 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 5931 transitions. Word has length 53 [2023-11-29 04:40:24,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:40:24,887 INFO L495 AbstractCegarLoop]: Abstraction has 3812 states and 5931 transitions. [2023-11-29 04:40:24,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:40:24,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 5931 transitions. [2023-11-29 04:40:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 04:40:24,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:40:24,897 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:40:24,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 04:40:25,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:25,097 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:40:25,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:40:25,097 INFO L85 PathProgramCache]: Analyzing trace with hash 755412976, now seen corresponding path program 18 times [2023-11-29 04:40:25,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:40:25,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598945093] [2023-11-29 04:40:25,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:40:25,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:40:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:25,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:40:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:25,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:40:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:25,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 04:40:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 4 proven. 86 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-29 04:40:25,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:40:25,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598945093] [2023-11-29 04:40:25,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598945093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:40:25,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810221322] [2023-11-29 04:40:25,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:40:25,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:25,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:40:25,276 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:40:25,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 04:40:25,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-29 04:40:25,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:40:25,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:40:25,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:40:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 116 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 04:40:25,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:40:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 42 proven. 48 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-29 04:40:25,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810221322] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:40:25,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:40:25,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2023-11-29 04:40:25,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965797580] [2023-11-29 04:40:25,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:40:25,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:40:25,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:40:25,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:40:25,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:40:25,879 INFO L87 Difference]: Start difference. First operand 3812 states and 5931 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:40:27,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:40:27,588 INFO L93 Difference]: Finished difference Result 4118 states and 6362 transitions. [2023-11-29 04:40:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 04:40:27,588 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 54 [2023-11-29 04:40:27,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:40:27,599 INFO L225 Difference]: With dead ends: 4118 [2023-11-29 04:40:27,599 INFO L226 Difference]: Without dead ends: 3487 [2023-11-29 04:40:27,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:40:27,603 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:40:27,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 127 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:40:27,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3487 states. [2023-11-29 04:40:29,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3487 to 3033. [2023-11-29 04:40:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3033 states, 2726 states have (on average 1.3910491562729275) internal successors, (3792), 2882 states have internal predecessors, (3792), 109 states have call successors, (109), 47 states have call predecessors, (109), 197 states have return successors, (890), 103 states have call predecessors, (890), 109 states have call successors, (890) [2023-11-29 04:40:29,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3033 states to 3033 states and 4791 transitions. [2023-11-29 04:40:29,081 INFO L78 Accepts]: Start accepts. Automaton has 3033 states and 4791 transitions. Word has length 54 [2023-11-29 04:40:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:40:29,081 INFO L495 AbstractCegarLoop]: Abstraction has 3033 states and 4791 transitions. [2023-11-29 04:40:29,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:40:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3033 states and 4791 transitions. [2023-11-29 04:40:29,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 04:40:29,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:40:29,087 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:40:29,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 04:40:29,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:29,288 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:40:29,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:40:29,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1860247103, now seen corresponding path program 5 times [2023-11-29 04:40:29,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:40:29,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096282121] [2023-11-29 04:40:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:40:29,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:40:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:29,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:40:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:29,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:40:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:29,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 04:40:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 58 proven. 104 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 04:40:29,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:40:29,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096282121] [2023-11-29 04:40:29,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096282121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:40:29,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106426339] [2023-11-29 04:40:29,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:40:29,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:29,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:40:29,515 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:40:29,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 04:40:29,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 04:40:29,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:40:29,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:40:29,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:40:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 82 proven. 80 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 04:40:29,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:40:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 68 proven. 94 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 04:40:30,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106426339] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:40:30,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:40:30,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 20 [2023-11-29 04:40:30,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540507110] [2023-11-29 04:40:30,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:40:30,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 04:40:30,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:40:30,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 04:40:30,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:40:30,285 INFO L87 Difference]: Start difference. First operand 3033 states and 4791 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 04:40:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:40:32,001 INFO L93 Difference]: Finished difference Result 3488 states and 5388 transitions. [2023-11-29 04:40:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 04:40:32,002 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2023-11-29 04:40:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:40:32,010 INFO L225 Difference]: With dead ends: 3488 [2023-11-29 04:40:32,010 INFO L226 Difference]: Without dead ends: 2808 [2023-11-29 04:40:32,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 04:40:32,013 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 76 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:40:32,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 204 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:40:32,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2023-11-29 04:40:33,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2593. [2023-11-29 04:40:33,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2358 states have (on average 1.421119592875318) internal successors, (3351), 2484 states have internal predecessors, (3351), 84 states have call successors, (84), 30 states have call predecessors, (84), 150 states have return successors, (775), 78 states have call predecessors, (775), 84 states have call successors, (775) [2023-11-29 04:40:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 4210 transitions. [2023-11-29 04:40:33,361 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 4210 transitions. Word has length 56 [2023-11-29 04:40:33,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:40:33,361 INFO L495 AbstractCegarLoop]: Abstraction has 2593 states and 4210 transitions. [2023-11-29 04:40:33,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 04:40:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 4210 transitions. [2023-11-29 04:40:33,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 04:40:33,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:40:33,368 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:40:33,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 04:40:33,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:33,569 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:40:33,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:40:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash -789935311, now seen corresponding path program 6 times [2023-11-29 04:40:33,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:40:33,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634529804] [2023-11-29 04:40:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:40:33,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:40:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:33,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:40:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:33,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:40:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:33,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 04:40:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 12 proven. 131 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-11-29 04:40:33,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:40:33,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634529804] [2023-11-29 04:40:33,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634529804] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:40:33,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017974290] [2023-11-29 04:40:33,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:40:33,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:33,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:40:33,740 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:40:33,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 04:40:33,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-29 04:40:33,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:40:33,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:40:33,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:40:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 142 proven. 3 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-11-29 04:40:34,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:40:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 140 proven. 3 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-11-29 04:40:34,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017974290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:40:34,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:40:34,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 22 [2023-11-29 04:40:34,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783430973] [2023-11-29 04:40:34,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:40:34,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 04:40:34,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:40:34,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 04:40:34,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2023-11-29 04:40:34,463 INFO L87 Difference]: Start difference. First operand 2593 states and 4210 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 04:40:35,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:40:35,780 INFO L93 Difference]: Finished difference Result 2642 states and 4265 transitions. [2023-11-29 04:40:35,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 04:40:35,781 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 62 [2023-11-29 04:40:35,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:40:35,786 INFO L225 Difference]: With dead ends: 2642 [2023-11-29 04:40:35,786 INFO L226 Difference]: Without dead ends: 2350 [2023-11-29 04:40:35,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2023-11-29 04:40:35,788 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:40:35,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 158 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:40:35,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2023-11-29 04:40:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 2061. [2023-11-29 04:40:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 1883 states have (on average 1.4391927774827402) internal successors, (2710), 1979 states have internal predecessors, (2710), 64 states have call successors, (64), 18 states have call predecessors, (64), 113 states have return successors, (657), 63 states have call predecessors, (657), 64 states have call successors, (657) [2023-11-29 04:40:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 3431 transitions. [2023-11-29 04:40:36,807 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 3431 transitions. Word has length 62 [2023-11-29 04:40:36,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:40:36,807 INFO L495 AbstractCegarLoop]: Abstraction has 2061 states and 3431 transitions. [2023-11-29 04:40:36,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 04:40:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 3431 transitions. [2023-11-29 04:40:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 04:40:36,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:40:36,815 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:40:36,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 04:40:37,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:37,015 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:40:37,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:40:37,016 INFO L85 PathProgramCache]: Analyzing trace with hash -371391504, now seen corresponding path program 7 times [2023-11-29 04:40:37,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:40:37,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030508669] [2023-11-29 04:40:37,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:40:37,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:40:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:37,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:40:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:37,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:40:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:37,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 04:40:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 04:40:37,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:40:37,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030508669] [2023-11-29 04:40:37,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030508669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:40:37,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644534155] [2023-11-29 04:40:37,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:40:37,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:37,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:40:37,759 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:40:37,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 04:40:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:37,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 04:40:37,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:40:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 04:40:38,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:40:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 04:40:38,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644534155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:40:38,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:40:38,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 22 [2023-11-29 04:40:38,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80609095] [2023-11-29 04:40:38,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:40:38,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 04:40:38,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:40:38,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 04:40:38,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2023-11-29 04:40:38,596 INFO L87 Difference]: Start difference. First operand 2061 states and 3431 transitions. Second operand has 22 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:40:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:40:40,207 INFO L93 Difference]: Finished difference Result 2555 states and 4672 transitions. [2023-11-29 04:40:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 04:40:40,208 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 63 [2023-11-29 04:40:40,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:40:40,214 INFO L225 Difference]: With dead ends: 2555 [2023-11-29 04:40:40,214 INFO L226 Difference]: Without dead ends: 2551 [2023-11-29 04:40:40,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:40:40,216 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 32 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:40:40,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 522 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:40:40,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2023-11-29 04:40:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2233. [2023-11-29 04:40:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2043 states have (on average 1.4434654919236416) internal successors, (2949), 2147 states have internal predecessors, (2949), 68 states have call successors, (68), 18 states have call predecessors, (68), 121 states have return successors, (742), 67 states have call predecessors, (742), 68 states have call successors, (742) [2023-11-29 04:40:41,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 3759 transitions. [2023-11-29 04:40:41,416 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 3759 transitions. Word has length 63 [2023-11-29 04:40:41,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:40:41,416 INFO L495 AbstractCegarLoop]: Abstraction has 2233 states and 3759 transitions. [2023-11-29 04:40:41,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 04:40:41,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 3759 transitions. [2023-11-29 04:40:41,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 04:40:41,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:40:41,422 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:40:41,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 04:40:41,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:41,623 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:40:41,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:40:41,623 INFO L85 PathProgramCache]: Analyzing trace with hash 329673074, now seen corresponding path program 19 times [2023-11-29 04:40:41,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:40:41,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68874523] [2023-11-29 04:40:41,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:40:41,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:40:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:42,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:40:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:42,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:40:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:42,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 04:40:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 59 proven. 162 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 04:40:43,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:40:43,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68874523] [2023-11-29 04:40:43,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68874523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:40:43,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15221406] [2023-11-29 04:40:43,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:40:43,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:43,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:40:43,084 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:40:43,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 04:40:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:43,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 04:40:43,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:40:44,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:40:44,007 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 25 treesize of output 27 [2023-11-29 04:40:44,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:40:44,107 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 36 treesize of output 37 [2023-11-29 04:40:44,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:40:44,208 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 36 treesize of output 30 [2023-11-29 04:40:44,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:44,329 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-29 04:40:44,330 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 44 treesize of output 27 [2023-11-29 04:40:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 63 proven. 187 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:40:44,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:40:46,190 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 63 treesize of output 53 [2023-11-29 04:40:46,194 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 34 treesize of output 26 [2023-11-29 04:40:46,554 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:40:46,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 63 [2023-11-29 04:40:46,564 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 6 [2023-11-29 04:40:46,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:40:46,579 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 40 treesize of output 44 [2023-11-29 04:40:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:40:47,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15221406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:40:47,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:40:47,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 24] total 61 [2023-11-29 04:40:47,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246740380] [2023-11-29 04:40:47,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:40:47,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-29 04:40:47,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:40:47,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-29 04:40:47,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=3368, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 04:40:47,242 INFO L87 Difference]: Start difference. First operand 2233 states and 3759 transitions. Second operand has 61 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 58 states have internal predecessors, (135), 7 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-29 04:40:57,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:40:57,035 INFO L93 Difference]: Finished difference Result 8002 states and 13726 transitions. [2023-11-29 04:40:57,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 04:40:57,036 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 58 states have internal predecessors, (135), 7 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 63 [2023-11-29 04:40:57,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:40:57,050 INFO L225 Difference]: With dead ends: 8002 [2023-11-29 04:40:57,050 INFO L226 Difference]: Without dead ends: 5332 [2023-11-29 04:40:57,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1238, Invalid=10534, Unknown=0, NotChecked=0, Total=11772 [2023-11-29 04:40:57,065 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 205 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 2762 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:40:57,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 751 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2762 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-29 04:40:57,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5332 states. [2023-11-29 04:40:59,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5332 to 3792. [2023-11-29 04:40:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3470 states have (on average 1.4463976945244956) internal successors, (5019), 3648 states have internal predecessors, (5019), 117 states have call successors, (117), 32 states have call predecessors, (117), 204 states have return successors, (1317), 111 states have call predecessors, (1317), 117 states have call successors, (1317) [2023-11-29 04:40:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 6453 transitions. [2023-11-29 04:40:59,096 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 6453 transitions. Word has length 63 [2023-11-29 04:40:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:40:59,096 INFO L495 AbstractCegarLoop]: Abstraction has 3792 states and 6453 transitions. [2023-11-29 04:40:59,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 58 states have internal predecessors, (135), 7 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-29 04:40:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 6453 transitions. [2023-11-29 04:40:59,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 04:40:59,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:40:59,104 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:40:59,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-29 04:40:59,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 04:40:59,305 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:40:59,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:40:59,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1382508754, now seen corresponding path program 20 times [2023-11-29 04:40:59,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:40:59,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208757942] [2023-11-29 04:40:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:40:59,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:40:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:41:00,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:41:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:41:00,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:41:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:41:00,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 04:41:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:41:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 65 proven. 161 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 04:41:00,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:41:00,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208757942] [2023-11-29 04:41:00,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208757942] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:41:00,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766137840] [2023-11-29 04:41:00,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:41:00,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:41:00,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:41:00,974 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:41:00,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 04:41:01,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:41:01,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:41:01,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 04:41:01,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:41:01,802 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:41:01,802 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 25 treesize of output 27 [2023-11-29 04:41:01,902 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:41:01,902 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 36 treesize of output 30 [2023-11-29 04:41:01,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:41:01,984 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 36 treesize of output 30 [2023-11-29 04:41:02,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:41:02,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:41:02,097 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-29 04:41:02,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 34 [2023-11-29 04:41:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 46 proven. 197 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:41:02,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:41:03,729 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 63 treesize of output 53 [2023-11-29 04:41:03,732 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 34 treesize of output 26 [2023-11-29 04:41:04,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:41:04,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 63 [2023-11-29 04:41:04,114 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 6 [2023-11-29 04:41:04,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:41:04,137 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 40 treesize of output 44 [2023-11-29 04:41:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 26 proven. 214 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 04:41:04,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766137840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:41:04,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:41:04,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 22] total 61 [2023-11-29 04:41:04,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79814866] [2023-11-29 04:41:04,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:41:04,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-29 04:41:04,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:41:04,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-29 04:41:04,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=3334, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 04:41:04,763 INFO L87 Difference]: Start difference. First operand 3792 states and 6453 transitions. Second operand has 61 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 58 states have internal predecessors, (137), 7 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-29 04:41:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:41:22,575 INFO L93 Difference]: Finished difference Result 10240 states and 16921 transitions. [2023-11-29 04:41:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2023-11-29 04:41:22,576 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 58 states have internal predecessors, (137), 7 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 63 [2023-11-29 04:41:22,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:41:22,594 INFO L225 Difference]: With dead ends: 10240 [2023-11-29 04:41:22,594 INFO L226 Difference]: Without dead ends: 6428 [2023-11-29 04:41:22,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 112 SyntacticMatches, 4 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10529 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=3128, Invalid=26974, Unknown=0, NotChecked=0, Total=30102 [2023-11-29 04:41:22,613 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 194 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 2915 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 2977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:41:22,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 353 Invalid, 2977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2915 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-29 04:41:22,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6428 states. [2023-11-29 04:41:25,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6428 to 4450. [2023-11-29 04:41:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4450 states, 4067 states have (on average 1.4123432505532334) internal successors, (5744), 4271 states have internal predecessors, (5744), 151 states have call successors, (151), 50 states have call predecessors, (151), 231 states have return successors, (1453), 128 states have call predecessors, (1453), 151 states have call successors, (1453) [2023-11-29 04:41:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4450 states to 4450 states and 7348 transitions. [2023-11-29 04:41:25,294 INFO L78 Accepts]: Start accepts. Automaton has 4450 states and 7348 transitions. Word has length 63 [2023-11-29 04:41:25,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:41:25,294 INFO L495 AbstractCegarLoop]: Abstraction has 4450 states and 7348 transitions. [2023-11-29 04:41:25,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 58 states have internal predecessors, (137), 7 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-29 04:41:25,294 INFO L276 IsEmpty]: Start isEmpty. Operand 4450 states and 7348 transitions. [2023-11-29 04:41:25,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 04:41:25,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:41:25,301 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:41:25,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-29 04:41:25,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:41:25,501 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:41:25,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:41:25,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1959739406, now seen corresponding path program 21 times [2023-11-29 04:41:25,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:41:25,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086492161] [2023-11-29 04:41:25,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:41:25,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:41:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:41:26,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:41:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:41:26,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:41:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:41:26,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 04:41:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:41:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 64 proven. 158 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 04:41:26,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:41:26,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086492161] [2023-11-29 04:41:26,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086492161] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:41:26,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749760092] [2023-11-29 04:41:26,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:41:26,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:41:26,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:41:26,922 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:41:26,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54368a54-645e-4b0a-92c1-3cdd8ca379f5/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 04:41:27,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-29 04:41:27,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:41:27,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 04:41:27,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:41:27,916 INFO L349 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2023-11-29 04:41:27,917 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 2 case distinctions, treesize of input 29 treesize of output 35 [2023-11-29 04:41:28,077 INFO L349 Elim1Store]: treesize reduction 32, result has 42.9 percent of original size [2023-11-29 04:41:28,078 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 7 case distinctions, treesize of input 44 treesize of output 57 [2023-11-29 04:41:28,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:41:28,282 INFO L349 Elim1Store]: treesize reduction 32, result has 42.9 percent of original size [2023-11-29 04:41:28,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 59 treesize of output 75 [2023-11-29 04:41:28,584 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:41:28,585 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 36 treesize of output 23 [2023-11-29 04:41:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 59 proven. 154 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 04:41:29,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:41:30,806 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-29 04:41:30,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2023-11-29 04:41:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 125 proven. 86 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-29 04:41:30,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749760092] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:41:30,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:41:30,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 20] total 60 [2023-11-29 04:41:30,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892769820] [2023-11-29 04:41:30,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:41:30,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 04:41:30,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:41:30,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 04:41:30,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=3260, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 04:41:30,933 INFO L87 Difference]: Start difference. First operand 4450 states and 7348 transitions. Second operand has 60 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 56 states have internal predecessors, (112), 5 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-29 04:41:41,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.77s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:42:08,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]